The 1984 Pacific typhoon season has no official bounds, but most
tropical cyclones
A tropical cyclone is a rapidly rotating storm system characterized by a low-pressure center, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depend ...
tend to form in the northwestern Pacific Ocean between May and November. These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean. Tropical Storms formed in the entire west pacific basin were assigned a name by the
Joint Typhoon Warning Center
The Joint typhoon Warning Center (JTWC) is a joint United States Navy – United States Air Force command in Pearl Harbor, Hawaii. The JTWC is responsible for the issuing of tropical cyclone warnings in the North-West Pacific Ocean, South P ...
. Tropical depressions that enter or form in the Philippine area of responsibility are assigned a name by the
or PAGASA. This can often result in the same storm having two names.
A total of 30 tropical depressions formed in 1984 in the Western Pacific, of which 27 became tropical storms, 16 reached typhoon intensity, and two reached super typhoon strength. Eight tropical cyclones moved into mainland China, four struck
Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
, four moved through the
Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
, and one cyclone moved into
South Korea
South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korea, Korean Peninsula and sharing a Korean Demilitarized Zone, land border with North Korea. Its western border is formed ...
. The second consecutive typhoon season with a late start, all of the season activity was contained between June and December, with August and October the most active months, contributing to half of the seasonal tropical cyclone count.
Season summary
ImageSize = width:1000 height:250
PlotArea = top:10 bottom:80 right:20 left:20
Legend = columns:3 left:30 top:58 columnwidth:270
AlignBars = early
DateFormat = dd/mm/yyyy
Period = from:01/06/1984 till:31/12/1984
TimeAxis = orientation:horizontal
ScaleMinor = grid:black unit:month increment:1 start:01/06/1984
Colors =
id:canvas value:gray(0.88)
id:GP value:red
id:TD value:rgb(0.38,0.73,1) legend:Tropical_Depression_=_≤62_km/h_(≤39_mph)
id:TS value:rgb(0,0.98,0.96) legend:Tropical_Storm_=_63-88_km/h_(39-54_mph)
id:ST value:rgb(0.80,1,1) legend:Severe_Tropical_Storm_=_89-117_km/h_(55-73_mph)
id:TY value:rgb(0.99,0.69,0.6) legend:Typhoon_=_≥118_km/h_(≥74_mph)
Backgroundcolors = canvas:canvas
BarData =
barset:Hurricane
bar:Month
PlotData=
barset:Hurricane width:10 align:left fontsize:S shift:(4,-4) anchor:till
from:06/06/1984 till:11/06/1984 color:TS text:"Vernon"
from:18/06/1984 till:27/06/1984 color:ST text:"Wynne"
from:01/07/1984 till:04/07/1984 color:TY text:"Alex"
from:04/07/1984 till:10/07/1984 color:ST text:"Betty"
from:06/07/1984 till:17/07/1984 color:TY text:"Cary"
from:24/07/1984 till:01/08/1984 color:TY text:"Dinah"
from:24/07/1984 till:02/08/1984 color:TY text:"Ed"
from:30/07/1984 till:03/08/1984 color:TD text:"TD"
from:02/08/1984 till:05/08/1984 color:TD text:"TD"
from:02/08/1984 till:06/08/1984 color:TD text:"TD"
barset:break
from:04/08/1984 till:10/08/1984 color:ST text:"Freda"
from:11/08/1984 till:14/08/1984 color:TD text:"Edeng"
from:14/08/1984 till:15/08/1984 color:TD text:"TD"
from:14/08/1984 till:17/08/1984 color:TD text:"Gloring"
from:15/08/1984 till:22/08/1984 color:ST text:"Gerald"
from:15/08/1984 till:22/08/1984 color:TY text:"Holly
''Ilex'' (), or holly, is a genus of over 570 species of flowering plants in the family Aquifoliaceae, and the only living genus in that family. ''Ilex'' has the most species of any woody dioecious angiosperm genus. The species are evergreen o ...
"
from:17/08/1984 till:20/08/1984 color:TD text:"TD"
from:24/08/1984 till:27/08/1984 color:TD text:"Lusing"
from:26/08/1984 till:06/09/1984 color:TY text:"Ike
Ike or IKE may refer to:
People
* Ike (given name), a list of people with the name or nickname
* Dwight D. Eisenhower (1890–1969), Supreme Commander of the Allied forces in Europe during World War II and President of the United States Surname
...
"
from:26/08/1984 till:01/09/1984 color:TY text:"June
June is the sixth month of the year in the Julian and Gregorian calendars and is the second of four months to have a length of 30 days, and the third of five months to have a length of less than 31 days. June contains the summer solstice in ...
"
barset:break
from:02/09/1984 till:03/09/1984 color:TD text:"Moke"
from:10/09/1984 till:16/09/1984 color:TD text:"TD"
from:13/09/1984 till:19/09/1984 color:TY text:"Kelly"
from:22/09/1984 till:24/09/1984 color:TD text:"TD"
from:23/09/1984 till:27/09/1984 color:TS text:"Lynn"
from:25/09/1984 till:29/09/1984 color:TD text:"Osang"
from:26/09/1984 till:01/10/1984 color:ST text:"Maury"
from:27/09/1984 till:02/10/1984 color:TS text:"Nina"
from:01/10/1984 till:04/10/1984 color:TD text:"TD"
from:03/10/1984 till:03/10/1984 color:TD text:"TD"
barset:break
from:07/10/1984 till:10/10/1984 color:TY text:"Ogden"
from:09/10/1984 till:14/10/1984 color:TY text:"Phyllis"
from:09/10/1984 till:14/10/1984 color:TS text:"Roy"
from:10/10/1984 till:15/10/1984 color:TS text:"Susan"
from:17/10/1984 till:18/10/1984 color:TD text:"23W"
from:18/10/1984 till:20/10/1984 color:TD text:"Paring"
from:18/10/1984 till:23/10/1984 color:TY text:"Thad"
from:22/10/1984 till:30/10/1984 color:TY text:"Vanessa Vanessa may refer to:
Arts and entertainment
* ''Vanessa'' (Millais painting), an 1868 painting by Pre-Raphaelite artist John Everett Millais
* ''Vanessa'', a 1933 novel by Hugh Walpole
* ''Vanessa'', a 1952 instrumental song written by Bernie ...
"
from:23/10/1984 till:02/11/1984 color:ST text:"Warren
A warren is a network of wild rodent or lagomorph, typically rabbit burrows. Domestic warrens are artificial, enclosed establishment of animal husbandry dedicated to the raising of rabbits for meat and fur. The term evolved from the medieval Angl ...
"
from:25/10/1984 till:27/10/1984 color:TD text:"Seniang"
barset:break
from:31/10/1984 till:09/11/1984 color:TY text:" Agnes"
from:08/11/1984 till:23/11/1984 color:TY text:"Bill"
from:14/11/1984 till:21/11/1984 color:TY text:"Clara"
from:03/12/1984 till:12/12/1984 color:TY text:"Doyle"
barset:skip
bar:Month width:5 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas
from:01/06/1984 till:30/06/1984 text:June
from:01/07/1984 till:31/07/1984 text:July
from:01/08/1984 till:31/08/1984 text:August
from:01/09/1984 till:30/09/1984 text:September
from:01/10/1984 till:31/10/1984 text:October
from:01/11/1984 till:30/11/1984 text:November
from:01/12/1984 till:31/12/1984 text:December
Despite its late start, a total of 30 tropical depressions formed this year in the Western Pacific, of which 27 became tropical storms. A total of 16 storms reached typhoon intensity, of which 2 reached super typhoon strength. Three of the systems formed in June, four in July, seven in August, four in September, eight in October, three in November, and one in December. Eight tropical cyclones moved into mainland China, four struck Vietnam, four moved through the Philippines, and one cyclone moved into South Korea. The most damaging and deadly typhoon this season was Ike, which led to significant damage and two-thirds of the overall seasonal death toll, mainly from the Philippines. The longest lived cyclone was Bill, which persisted for two weeks during mid November. Despite the eight tropical cyclones moving into China, Hong Kong received only 18 percent of its annual rainfall from tropical cyclones, which was 35 percent below the annual average.
[Hong Kong Royal Observatory (1985)]
Meteorological Results: 1984.
Retrieved on 2008-12-18.
Systems
Tropical Storm Vernon
Tropical Storm Vernon, the first of the year, developed in the
South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
on June 6. It moved northwest, and then westward in an environment of strong vertical
wind shear
Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizontal ...
, Vernon moved inland into
Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
on June 10. Flooding of rice, sweet potato, and sesame crops in Quảng Nam-Da Nang province was caused by Vernon. Combined with 1983's late formation of Tropical Storm Sarah in June, this is only known time that two consecutive years had their first storm develop as late as June.
Severe Tropical Storm Wynne (Asiang)
The
monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
established itself across the
South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
eastward into the
Philippine Sea
The Philippine Sea is a marginal sea of the Western Pacific Ocean east of the Philippine archipelago (hence the name), the largest in the world, occupying an estimated surface area of . The Philippine Sea Plate forms the floor of the sea. Its ...
on June 14. A tropical disturbance formed within this trough on June 16 in the northern Philippine Sea. Moving westward for much of its existence to the south of a narrow
subtropical ridge
The horse latitudes are the latitudes about 30 degrees north and south of the Equator. They are characterized by sunny skies, calm winds, and very little precipitation. They are also known as Subtropics, subtropical ridges, or highs. It is a h ...
, an upper level high developed over the strengthening low level circulation early on June 19, which became a tropical depression that day. By that evening, the cyclone had strengthened into a tropical storm. Strong upper level ridging over mainland China led to easterly vertical
wind shear
Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizontal ...
, which limited intensification. The cyclone passed by the southern coast of
Taiwan
Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the nort ...
, which caused slight weakening as it entered the
South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
. Passing south of Hong Kong, a U. S. Naval ship and Hong Kong both reported winds of , with gusts to reported at Tate's Cairn and noted out at sea.
Southwest flow to the south of Wynne led to flooding in
Luzon
Luzon (; ) is the largest and most populous island in the Philippines. Located in the northern portion of the Philippines archipelago, it is the economic and political center of the nation, being home to the country's capital city, Manila, as ...
, where of riceland was destroyed. Three fisherman drowned north of Luzon. Late on June 25, Wynne made landfall in China near the
Luichow Peninsula
The Leizhou Peninsula, alternately romanized as the Luichow Peninsula, is a peninsula in the southernmost part of Guangdong province in South China.
History
Qing naval forces were stationed at the Leizhou Peninsula. During the 19th centur ...
, and then weakened rapidly inland.
Typhoon Alex (Biring)
On June 28, a surface circulation formed in the
Philippine Sea
The Philippine Sea is a marginal sea of the Western Pacific Ocean east of the Philippine archipelago (hence the name), the largest in the world, occupying an estimated surface area of . The Philippine Sea Plate forms the floor of the sea. Its ...
. Development of the system began in earnest on June 30, and a tropical depression had formed early on July 1, with tropical storm status attained later in the day. A ridge to its north eroded, allowing Alex to move north-northwest towards
Taiwan
Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the nort ...
. Alex became the first typhoon of the season shortly before moving across the mountainous island. On July 5, extratropical transition of Alex had begun. By late in the day, it was an
extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of ...
along a frontal zone in the
Sea of Japan
The Sea of Japan is the marginal sea between the Japanese archipelago, Sakhalin, the Korean Peninsula, and the mainland of the Russian Far East. The Japanese archipelago separates the sea from the Pacific Ocean. Like the Mediterranean Sea, it h ...
.
Severe Tropical Storm Betty (Konsing)
Development of this system was slow within the eastern portion of the
monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
. By midday on July 2, the disturbance was first noted about southwest of
Guam
Guam (; ch, Guåhan ) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. It is the westernmost point and territory of the United States (reckoned from the geographic cent ...
. The system moved northwest for much of its life cycle, initially following Alex and then the southwest side of the
subtropical ridge
The horse latitudes are the latitudes about 30 degrees north and south of the Equator. They are characterized by sunny skies, calm winds, and very little precipitation. They are also known as Subtropics, subtropical ridges, or highs. It is a h ...
. A broad tropical depression formed on the afternoon on July 5 within the disturbed weather area, weakening as it passed over
Luzon
Luzon (; ) is the largest and most populous island in the Philippines. Located in the northern portion of the Philippines archipelago, it is the economic and political center of the nation, being home to the country's capital city, Manila, as ...
. Late on July 7, ship reports indicated the system had become a tropical storm. The cyclone moved within the radar fence of Hong Kong near its peak intensity before making landfall to its west-southwest during the early afternoon of July 9. Winds gusted to at Green Island.
Weakening over the topography of China was rapid thereafter, and the system dissipated by early on July 10.
Typhoon Cary
Initiated by the tropical tropospheric trough (TUTT), an area of convection was first noted southeast of the upper trough in an area with favorable upper level divergence on July 2 near 18N 168E. The disturbance moved west-southwest and evolved into a tropical depression late on July 6 and a tropical storm soon after. The cyclone moved northwest towards a break in the
subtropical ridge
The horse latitudes are the latitudes about 30 degrees north and south of the Equator. They are characterized by sunny skies, calm winds, and very little precipitation. They are also known as Subtropics, subtropical ridges, or highs. It is a h ...
and reached typhoon status late on July 9 forming a large eye about in diameter. Rapid development continued for another 12 hours as it slowly moved through the ridge axis. The cyclone turned northeast late on July 10 as it began to be sheared significantly from the northwest. Shearing relented on July 11 allowing the eye to reform, this time wide. As the typhoon progressed more poleward, increased vertical wind shear and the entrainment of cooler and drier air began its extratropical transition. By late on July 14, Cary had become an
extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of ...
. The nontropical system then moved westward, eventually dissipating south of Japan.
Typhoon Dinah
For two weeks after Betty and Cary, a high pressure dominated the northwest Pacific, with no sign of a monsoon trough. A cold front dropped into the area from the north, and remained stationary across much of the central North Pacific just north of
Wake Island
Wake Island ( mh, Ānen Kio, translation=island of the kio flower; also known as Wake Atoll) is a coral atoll in the western Pacific Ocean in the northeastern area of the Micronesia subregion, east of Guam, west of Honolulu, southeast of To ...
for nearly a week. An area of convection along the tail of the old frontal boundary formed on July 21, and closed off a wind circulation just northwest of Wake Island. Drifting westward, the system did not develop considerably until July 23. By late on July 24, it became a tropical depression. Intensifying while moving west-southwest, the system became a typhoon late on July 25 with a wide eye.
[Joint Typhoon Warning Center]
Typhoon Dinah.
Retrieved on 2007-02-03.
Meanwhile, Tropical Storm Ed was approaching from the northwest and the ridge north of Dinah moved east, which turned the typhoon northwest. For 48 hours between July 26 and July 28, Dinah and Ed were between and from one another, and
fujiwhara interaction
The Fujiwhara effect, sometimes referred to as the Fujiwara effect, Fujiw(h)ara interaction or binary interaction, is a phenomenon that occurs when two nearby cyclonic vortices move around each other and close the distance between the circulations ...
did impart a slight change onto Dinah's track. On July 27, while the cyclones were at their closest approach, Dinah weakened due to the more dominant outflow from Ed. The westerly shear led to a change in track to the east-northeast for Dinah. On July 28, once the cyclones moved farther apart, Dinah restrengthened rapidly and reached its maximum intensity by noon on July 29. Moving north-northeast around the western fringe of the
subtropical ridge
The horse latitudes are the latitudes about 30 degrees north and south of the Equator. They are characterized by sunny skies, calm winds, and very little precipitation. They are also known as Subtropics, subtropical ridges, or highs. It is a h ...
, Dinah's motion accelerated, moving close to
Marcus Island
, also known as Marcus Island, is an isolated Japanese coral atoll in the northwestern Pacific Ocean, located some southeast of Tokyo and east of the closest Japanese island, South Iwo Jima of the Ogasawara Islands, and nearly on a straight line ...
late that afternoon, causing extensive vegetation damage. The
coast guard
A coast guard or coastguard is a maritime security organization of a particular country. The term embraces wide range of responsibilities in different countries, from being a heavily armed military force with customs and security duties to ...
station on the island sustained US$30,000 in damage (1984 dollars) when sustained winds reached , with gusts to . Weakening as it continued to move north-northeast, Dinah regained tropical storm status on July 31. Veering more northeast and interacting with a nearby upper trough in the Westerlies, Dinah became an
extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of ...
late on August 1. The nontropical cyclone moved off the east, eventually crossing the
International Date Line
The International Date Line (IDL) is an internationally accepted demarcation on the surface of Earth, running between the South and North Poles and serving as the boundary between one calendar day and the next. It passes through the Pacific O ...
.
[
]
Typhoon Ed
Ed formed along the tail of a weakening cold front just south of Japan on July 23. It took a day to become detached on satellite pictures, and become a tropical disturbance. On the morning of July 25 a surface circulation had formed and the cyclone became a tropical depression. By July 26, it became a tropical storm. Initially it moved southeast during this period of strengthening as it approached Typhoon Dinah. As a shortwave trough in the Westerlies approached Ed, the cyclone turned north and moved away from Dinah. Ridging built in quickly behind the shortwave, and the cyclone turned west-northwest; a course it would maintain until landfall in mainland China. Strengthening continued, and Ed became an intense typhoon just south of Kyūshū
is the third-largest island of Japan's five main islands and the most southerly of the four largest islands ( i.e. excluding Okinawa). In the past, it has been known as , and . The historical regional name referred to Kyushu and its surround ...
. As it moved across the East China Sea
The East China Sea is an arm of the Western Pacific Ocean, located directly offshore from East China. It covers an area of roughly . The sea’s northern extension between mainland China and the Korean Peninsula is the Yellow Sea, separated b ...
, cooler waters and drier air led to weakening. Late on July 31, Ed made landfall north of Shang-Hai as a strong tropical storm. Turning northwest after landfall, Ed moved along the Chinese coast and gradually weakened. By late on August 1, it had dissipated as a tropical cyclone. The Korean ship ''Ishlin Glory'' sank in the Korea Strait
The Korea Strait is a sea passage in East Asia between Korea and Japan, connecting the East China Sea, the Yellow Sea and the Sea of Japan in the northwest Pacific Ocean. The strait is split by the Tsushima Island into the Western Channel and t ...
on July 29, which led to one death and 11 others declared missing. The launch of the weather satellite
A weather satellite or meteorological satellite is a type of Earth observation satellite that is primarily used to monitor the weather and climate of the Earth. Satellites can be polar orbiting (covering the entire Earth asynchronously), or ge ...
GMS-3 was delayed by this typhoon's passage nearby Japan.
Severe Tropical Storm Freda (Ditang)
The tail end of a trough extending southwest of Dinah west of Guam led to the development of this system. A tropical disturbance formed there on August 2 and developed a surface cyclone in the Philippine Sea
The Philippine Sea is a marginal sea of the Western Pacific Ocean east of the Philippine archipelago (hence the name), the largest in the world, occupying an estimated surface area of . The Philippine Sea Plate forms the floor of the sea. Its ...
later that day. A broad surface cyclone, the system tracked northwest and slowly developed. By late on August 5, it became a tropical depression. During the morning of August 6, it strengthened into a tropical storm while maintaining its broad center and a pair of circulation centers. The new northern center became dominant overnight. The system jumped northwest and quickly moved through the Formosa Straits
The Taiwan Strait is a -wide strait separating the island of Taiwan and continental Asia. The strait is part of the South China Sea and connects to the East China Sea to the north. The narrowest part is wide.
The Taiwan Strait is itself a s ...
before striking mainland China very early on August 8. Two died in Taiwan due to Freda. After two days inland, Freda finally dissipated as a tropical cyclone, but its cloud pattern remained identifiable for an additional day or two thereafter.
Tropical Depression 09W (Edeng)
A broad surface low formed in the near equatorial trough on August 7 about south of Guam
Guam (; ch, Guåhan ) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. It is the westernmost point and territory of the United States (reckoned from the geographic cent ...
. Moving northwest, the disturbance slowly organized as it moved into the southeast portion of the monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
. On August 10, the low jogged northward for a day towards an upper-level low northwest of Taiwan
Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the nort ...
. Late on August 11, the low became a tropical depression, which was named Edeng by PAGASA and designated 09W by the Joint Typhoon Warning Center. It then moved west-northwest along the northern side of the monsoon trough as a sheared system due to moderate southerly flow aloft. A new circulation center developed, which led to PAGASA renaming the system Gloring as it neared the southern coast of Taiwan. The depression ultimately merged with a low-pressure area over the South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
, which would develop into Tropical Storm Gerald.
Severe Tropical Storm Gerald (Huaning)
Gerald formed within the monsoon trough in the northern South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
, where it meandered for its existence. The initial surface low formed on August 12 near 18N 117E. Slow development continued, and when the remains of Tropical Depression 09W/Gloring became absorbed by this cyclone, thunderstorm activity increased significantly. The system was a monsoon depression, with a central pressure of and winds of up to a bit to the south of the circulation center. The storm's maximum sustained winds began to migrate closer to the center, and it became a tropical storm on the morning of August 16. Drifting west, Gerald slowly intensified for the next couple days. As Holly developed east of Taiwan
Taiwan, officially the Republic of China (ROC), is a country in East Asia, at the junction of the East and South China Seas in the northwestern Pacific Ocean, with the People's Republic of China (PRC) to the northwest, Japan to the nort ...
, its outflow sheared Gerald, keeping the system from becoming a typhoon. Holly's proximity led to Gerald completing a small cyclonic loop on August 17. As Holly turned northwest, Gerald drifted westward once again. By August 20, Holly's large circulation over the East China Sea
The East China Sea is an arm of the Western Pacific Ocean, located directly offshore from East China. It covers an area of roughly . The sea’s northern extension between mainland China and the Korean Peninsula is the Yellow Sea, separated b ...
lured Gerald northeast. Shearing again increased, weakening Gerald. The cyclone made landfall east-northeast of Hong Kong as a tropical depression. Winds gusted to at Tate's Cairn. Once inland, it turned to the north and weakened rapidly.
Typhoon Holly (Isang)
This system formed in the eastern end of the monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
that spawned Gerald. A very large cyclone, it did not close off a wind circulation until it achieved tropical storm strength on the morning of August 16. Like Freda and TD 09W, it had a broad center with light winds for much of its life cycle. Kadena Air Force Base, on Okinawa
is a prefecture of Japan. Okinawa Prefecture is the southernmost and westernmost prefecture of Japan, has a population of 1,457,162 (as of 2 February 2020) and a geographic area of 2,281 km2 (880 sq mi).
Naha is the capital and largest city ...
, measured of rainfall from this cyclone, and two periods of winds exceeding on August 18, and then again late August 19 and early August 20. The cyclone moved westward under the base of the subtropical ridge
The horse latitudes are the latitudes about 30 degrees north and south of the Equator. They are characterized by sunny skies, calm winds, and very little precipitation. They are also known as Subtropics, subtropical ridges, or highs. It is a h ...
and reached typhoon strength on the morning of August 18. The system turned northwest and then north around the ridge's periphery at a relatively slow speed. As the system turned northeast and accelerated out of the East China Sea
The East China Sea is an arm of the Western Pacific Ocean, located directly offshore from East China. It covers an area of roughly . The sea’s northern extension between mainland China and the Korean Peninsula is the Yellow Sea, separated b ...
into the Korea Strait
The Korea Strait is a sea passage in East Asia between Korea and Japan, connecting the East China Sea, the Yellow Sea and the Sea of Japan in the northwest Pacific Ocean. The strait is split by the Tsushima Island into the Western Channel and t ...
, it led to considerable damage in the Korean peninsula
Korea ( ko, 한국, or , ) is a peninsular region in East Asia. Since 1945, it has been divided at or near the 38th parallel, with North Korea (Democratic People's Republic of Korea) comprising its northern half and South Korea (Republic o ...
and across Kyūshū
is the third-largest island of Japan's five main islands and the most southerly of the four largest islands ( i.e. excluding Okinawa). In the past, it has been known as , and . The historical regional name referred to Kyushu and its surround ...
. One perished, eleven were injured, and nine went missing. Miyazake, on Kyūshū, measured of rainfall in a 24‑hour period during Holly's passage. This rainfall led to flooding and landslides. Interaction with nearby landmasses began to weaken Holly, and interaction with a mid-level trough led to its extratropical transition. Holly became an extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of ...
as it approached Hokkaidō
is Japan's second largest island and comprises the largest and northernmost prefecture, making up its own region. The Tsugaru Strait separates Hokkaidō from Honshu; the two islands are connected by the undersea railway Seikan Tunnel.
The la ...
early on August 23.
Tropical Depression 12W (Lusing)
Convection formed in the eastern end of the monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
just north of Guam
Guam (; ch, Guåhan ) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. It is the westernmost point and territory of the United States (reckoned from the geographic cent ...
on August 20, leading to the formation of a weak low-pressure area by late morning August 21. The system slowly consolidated as it moved northwest, and was separating from the monsoon trough on August 23. Although convection increased in organization, the surface wind field did not respond. Nevertheless, it was deemed a tropical depression on the morning of August 24. By the next morning, the surface circulation became exposed as upper-level conditions worsened due to strong southerlies aloft. The cyclone was no longer deemed tropical at that time. The surface cyclone moved northwest, crossing the Ryūkyū Islands
The , also known as the or the , are a chain of Japanese islands that stretch southwest from Kyushu to Taiwan: the Ōsumi, Tokara, Amami, Okinawa, and Sakishima Islands (further divided into the Miyako and Yaeyama Islands), with Yonaguni ...
before it merged with a frontal zone in the northern East China Sea
The East China Sea is an arm of the Western Pacific Ocean, located directly offshore from East China. It covers an area of roughly . The sea’s northern extension between mainland China and the Korean Peninsula is the Yellow Sea, separated b ...
late on August 26.
Typhoon Ike (Nitang)
This tropical cyclone formed on August 27 in the Philippine Sea, and strengthened as it moved westward into the southern Philippines, becoming a typhoon on August 31. Typhoon Ike caused extreme wind and flooding damage when it crossed the Philippines, resulting in 1492 fatalities, one of the Philippines' worst natural disaster in modern times, and its worst typhoon since Amy struck the archipelago in 1951. A total of 200,000 to 480,000 were left homeless. Emerging from the Philippines as a strong tropical storm, Ike restrengthened as it tracked northwest through the South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
across northeast Hainan Island
Hainan (, ; ) is the smallest and southernmost province of the People's Republic of China (PRC), consisting of various islands in the South China Sea. , the largest and most populous island in China,The island of Taiwan, which is slightly l ...
. Weakening back into a tropical storm, Ike moving inland into mainland China. In Hong Kong, winds gusted to at Tate's Cairn. Extensive crop damage was experienced in southern China, with Ike becoming the most significant tropical cyclone to strike Guangxi since 1954. Total damage was reportedly US$111 million (1984 dollars). The name Ike was retired after this season.
Typhoon June (Maring)
A surface low formed within the monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
on August 25. The low drifted westward as convection tried to consolidate around the center. Strong upper level wind shear
Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizontal ...
inhibited development for the next couple of days. It took until late on August 28 for a single circulation center to consolidate, and when it did, gale-force winds around the center forced an upgrade from a monsoon depression to a tropical storm about east of Luzon
Luzon (; ) is the largest and most populous island in the Philippines. Located in the northern portion of the Philippines archipelago, it is the economic and political center of the nation, being home to the country's capital city, Manila, as ...
. Moving westward, it struck Luzon early on August 29. By late morning, the system turned west-northwest over the mountainous island, emerging into the South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
. A total of 121 lives were taken by June across the Philippines, and damage totaled US$5 million (1984 dollars.) A weakness in the subtropical ridge
The horse latitudes are the latitudes about 30 degrees north and south of the Equator. They are characterized by sunny skies, calm winds, and very little precipitation. They are also known as Subtropics, subtropical ridges, or highs. It is a h ...
to its north led to a turn to the northwest, and the system made landfall east of Hong Kong. Winds gusted to at Tate's Cairn, and total rainfall at Cheung Chau reached . When Tropical Storm June hit southeast China on August 30, 67 people were reported dead due to extensive flooding from June's broad circulation.
Tropical Depression Moke
JMA declared that a depression formed from a cold-core low on September 2. Moving eastwards, it crossed the International Date Line
The International Date Line (IDL) is an internationally accepted demarcation on the surface of Earth, running between the South and North Poles and serving as the boundary between one calendar day and the next. It passes through the Pacific O ...
on the next day. Just after crossing it strengthened into a tropical storm, thus receiving the name ''Moke'' from the Central Pacific Hurricane Center
The Central Pacific Hurricane Center (CPHC) of the United States National Weather Service is the official body responsible for tracking and issuing tropical cyclone warnings, watches, advisories, discussions, and statements for the Central Pacifi ...
.
Typhoon Kelly
Developing at the southern end of a shear line, a low level circulation formed on September 13 with increasing convective organization to the south of a cold core cyclone. Completing a cyclonic loop, the cyclone continued to develop despite cool air becoming entrained within its circulation. Approaching the upper-level low, Kelly slowed down its northward motion and reached its maximum intensity. Soon afterwards, it rapidly accelerated northeast. Losing its tropical character late on September 17, it became an extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of ...
on the morning of September 18. This cyclone continued moving northeast for another few days, past the International Date Line
The International Date Line (IDL) is an internationally accepted demarcation on the surface of Earth, running between the South and North Poles and serving as the boundary between one calendar day and the next. It passes through the Pacific O ...
and into the Gulf of Alaska
The Gulf of Alaska (Tlingit: ''Yéil T'ooch’'') is an arm of the Pacific Ocean defined by the curve of the southern coast of Alaska, stretching from the Alaska Peninsula and Kodiak Island in the west to the Alexander Archipelago in the east, ...
.
Tropical Storm Lynn
First noted as an area of poorly organized thunderstorms near Guam
Guam (; ch, Guåhan ) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. It is the westernmost point and territory of the United States (reckoned from the geographic cent ...
on September 19, the disturbance moved westward across the northern Philippine Sea
The Philippine Sea is a marginal sea of the Western Pacific Ocean east of the Philippine archipelago (hence the name), the largest in the world, occupying an estimated surface area of . The Philippine Sea Plate forms the floor of the sea. Its ...
. As an upper tropospheric cyclone weakened east of Luzon
Luzon (; ) is the largest and most populous island in the Philippines. Located in the northern portion of the Philippines archipelago, it is the economic and political center of the nation, being home to the country's capital city, Manila, as ...
on September 22, upper-level conditions improved, but no reflection at the surface was yet witnessed. The thunderstorms entered the South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
on September 23 while a lee side surface low formed along the monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
west of Luzon due to the strong easterly low-level flow. The disturbance rapidly consolidated, and it became a tropical depression early on September 24. Slowly intensifying as it moved west-northwest, Lynn became a tropical storm on September 25. At this point, the storm track became west-southwesterly and upper-level winds began to shear thunderstorms north of the center. Weakening ensued, and Lynn struggled to maintain tropical storm intensity as it made landfall about southeast of Da Nang, Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
. The depression then turned northwest and dissipated near the Vietnam/Laos
Laos (, ''Lāo'' )), officially the Lao People's Democratic Republic ( Lao: ສາທາລະນະລັດ ປະຊາທິປະໄຕ ປະຊາຊົນລາວ, French: République démocratique populaire lao), is a socialist ...
border early on September 28.
Severe Tropical Storm Maury
The system formed near the intersection of the northeast end of the monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
with a frontal boundary near Marcus Island
, also known as Marcus Island, is an isolated Japanese coral atoll in the northwestern Pacific Ocean, located some southeast of Tokyo and east of the closest Japanese island, South Iwo Jima of the Ogasawara Islands, and nearly on a straight line ...
just as Nina was developing 1300 km to its west on September 27. By early on September 28, it had become a tropical depression with tropical storm strength reached by noon as Maury moved north around Nina. Instead of recurving quickly around the subtropical ridge
The horse latitudes are the latitudes about 30 degrees north and south of the Equator. They are characterized by sunny skies, calm winds, and very little precipitation. They are also known as Subtropics, subtropical ridges, or highs. It is a h ...
to its east and southeast, Maury slowed as it entered Nina's larger circulation. Nina absorbed Maury's circulation on October 1 as it overtook the storm from the southwest.
Tropical Storm Nina
Like Maury, Nina formed near the intersection of a frontal zone and the monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
. On September 27, a circulation formed about north-northwest of Guam
Guam (; ch, Guåhan ) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. It is the westernmost point and territory of the United States (reckoned from the geographic cent ...
. An upper level high north of Guam allowed for further development. Moving north, the system detached from the monsoon trough, and it became a tropical depression on September 28. Southerly shear across the system led to an initially subtropical appearance, as thunderstorms moved away from the center. This also prevented significant development. On September 29, the main belt of the Westerlies captured the cyclone, displacing thunderstorms even farther east of the center. With the low level circulation exposed, Nina weakened into a tropical depression. By late on September 30, the low level circulation moved back under the convection, which resulted in reintensification back to a tropical storm at the same time Maury was absorbed into its circulation. By late morning October 1, Nina reached its maximum intensity, but extratropical transition was already underway. Central convection decreased, and Nina became an extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of ...
by October 2.
Typhoon Ogden
A weak surface low formed west of Truk on October 3, which contained little thunderstorm activity. Moving northwest, it joined the eastern section of the monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
. Following the flow around the east side of the trough towards the north, poorly organized convection became associated with the persistent low. Once it neared the northeast fringe of the trough, convective organization improved. Although still a very broad system, it became a tropical depression on the morning of October 7. Moving around the southwest part of a retreating subtropical ridge
The horse latitudes are the latitudes about 30 degrees north and south of the Equator. They are characterized by sunny skies, calm winds, and very little precipitation. They are also known as Subtropics, subtropical ridges, or highs. It is a h ...
, Ogden sharply recurved. By early October 8, it strengthened into a tropical storm and passed just east of Marcus Island
, also known as Marcus Island, is an isolated Japanese coral atoll in the northwestern Pacific Ocean, located some southeast of Tokyo and east of the closest Japanese island, South Iwo Jima of the Ogasawara Islands, and nearly on a straight line ...
. The cyclone attained typhoon intensity partially due to translational motion as it began to undergo extratropical transition on October 9. Southwest shear began to significantly impact the system thereafter, which weakened the system into a tropical storm on October 10. By noon, the system had fully evolved into an extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of ...
. The nontropical storm continued northeast towards the International Date Line
The International Date Line (IDL) is an internationally accepted demarcation on the surface of Earth, running between the South and North Poles and serving as the boundary between one calendar day and the next. It passes through the Pacific O ...
.
Typhoon Phyllis
Phyllis formed within a surface trough left behind by Ogden. By late on October 7, a surface low had formed east of Guam
Guam (; ch, Guåhan ) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. It is the westernmost point and territory of the United States (reckoned from the geographic cent ...
. The system drifted northeast. A compact system, the system became a tropical depression late on October 10 and a tropical storm on the morning of October 11. Northward acceleration had begun, and Phyllis became a typhoon the morning of October 12. A cut off low south of Honshū
, historically called , is the largest and most populous island of Japan. It is located south of Hokkaidō across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyūshū across the Kanmon Straits. The island separa ...
helped lead to strong southerly flow over Phyllis, which weakened the storm. The shear vector changed from southerly to easterly as the main belt of the Westerlies impacted the cyclone, which caused faster weakening. By the morning of October 14, Phyllis became a wave along the cold front approaching the system from the west.
Tropical Storm Roy
Developing southwest of Guam
Guam (; ch, Guåhan ) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. It is the westernmost point and territory of the United States (reckoned from the geographic cent ...
as Phyllis was forming to its northeast, a weak circulation developed on October 9. Upper level wind shear
Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizontal ...
from Ogden slowed development into October 10. Thereafter, convection became better organized with the system and it became a tropical depression by October 11. A compact system, it became a tropical storm later that morning. Strong upper level easterlies halted development due to vertical wind shear. The low-level monsoon flow became diverted from Roy to Phyllis, which removed a potential source of low-level vorticity. Roy was an exposed circulation center on October 12 with decreasing convection when its lowest central pressure was reached. By the morning of October 13, it lost its defined circulation center and had dissipated as a tropical cyclone.
Tropical Storm Susan
On October 10, a circulation had formed in the central South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
. Slow to consolidate, the low accelerated west along the axis of the monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
as it became a tropical depression late on October 11. Developing as it veered west-northwest, Susan became a minimal tropical storm as it made landfall just north of Nha Trang, Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
. The system turned northwest up the Mekong river
The Mekong or Mekong River is a trans-boundary river in East Asia and Southeast Asia. It is the world's twelfth longest river and the third longest in Asia. Its estimated length is , and it drains an area of , discharging of water annuall ...
valley, maintaining its identity as a convective area for the next three days. Extreme flooding struck eastern and central Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
on October 12 and caused 33 casualties and moderate crop damage.
Tropical Depression 23W
Developing within the monsoon trough
The monsoon trough is a portion of the Intertropical Convergence Zone in the Western Pacific,Bin WangThe Asian Monsoon.Retrieved 2008-05-03. as depicted by a line on a weather map showing the locations of minimum sea level pressure, and as such, ...
, convection increased near Truk on October 16. A central convective feature formed, and the system became a tropical depression that afternoon. Moving northwest, the depression weakened as it became sheared from the north and a larger circulation formed to its southeast, which evolved into Thad.
Typhoon Thad
Developing southeast of Guam
Guam (; ch, Guåhan ) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. It is the westernmost point and territory of the United States (reckoned from the geographic cent ...
as Tropical Depression 23W was dissipating, this convective cluster moved north-northwest. Forming a circulation center near Truk, Thad became a tropical storm as it approached Guam
Guam (; ch, Guåhan ) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. It is the westernmost point and territory of the United States (reckoned from the geographic cent ...
on October 19. Moving east of the island, Thad became an intense typhoon very early on October 22. Recurving into the Westerlies thereafter, the cyclone slowly weakened as it accelerated northeast and became an extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of ...
by October 24.
Typhoon Vanessa (Toyang)
This system formed in the near equatorial trough southeast of Ponape a few days after Thad on October 20. The system moved northwest to just north of Ponape as it slowly developed. The disturbance strengthened into a tropical depression by October 22 and a tropical storm October 23 despite some northwesterly shear from Thad. As a minimal typhoon, Vanessa moved about south of Guam
Guam (; ch, Guåhan ) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. It is the westernmost point and territory of the United States (reckoned from the geographic cent ...
, where winds gusted to on Nimitz Hill. Damage on the island totaled US$1.7 million (1984 dollars), mainly to the banana crop. Moving west-northwest, Vanessa continued to strengthen, becoming a super typhoon. Super Typhoon Vanessa was the strongest typhoon of the season, reaching maximum sustained wind
The maximum sustained wind associated with a tropical cyclone is a common
indicator of the intensity of the storm. Within a mature tropical cyclone, it is found within the eyewall at a distance defined as the radius of maximum wind, or RMW. Unl ...
speeds of over the open waters of the West Pacific. At its peak, it had a pressure of 880 mb, only 10 millibars higher than the record-setting Typhoon Tip
Typhoon Tip, known in the Philippines as Typhoon Warling, was the largest and most intense tropical cyclone ever recorded. The forty-third tropical depression, nineteenth tropical storm, twelfth typhoon, and third super typhoon of the 1979 Paci ...
of 1979. Its central pressure fell 100 mb in 48 hours. The intense cyclone recurved on October 27 and October 28 as a cold front approached from the northwest. Vanessa slowly merged with the frontal boundary, becoming a storm-force extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of ...
late on October 30.[Joint Typhoon Warning Center (1985)]
Super Typhoon Vanessa.
Retrieved on 2007-01-13.
Though the storm did not directly impact the Philippines, its outer bands triggered flooding that killed 63 people.
Severe Tropical Storm Warren (Reming)
The initial disturbance formed at the end of a shear line about northeast of Mindanao. Embedded within the monsoon trough, it was a broad depression. It slowly weakened as it moved west-southwest through the Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
into the South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
on October 22. Due to strengthening northeasterly low level flow, the circulation became better defined and conditions aloft favored strengthening. The system formed into a tropical depression late on October 23 despite easterly vertical wind shear
Wind shear (or windshear), sometimes referred to as wind gradient, is a difference in wind speed and/or direction over a relatively short distance in the atmosphere. Atmospheric wind shear is normally described as either vertical or horizontal ...
. By early on October 24, Warren became a tropical storm which then turned to the north. Between October 24 and October 26, the cyclone performed a small cyclonic loop. On October 26, Warren strengthened into a typhoon.
The steering flow weakened around Warren at that time as Vanessa was moving to its northeast. Warren became entrained into Vanessa's southwestern circulation, and turned east-northeast. As Vanessa moved away from Warren, the cyclone performed an anticyclonic loop and turned back to the west on October 28. Clark Air Force Base
Clark Air Base is a Philippine Air Force base on Luzon Island in the Philippines, located west of Angeles City, about northwest of Metro Manila. Clark Air Base was previously a United States military facility, operated by the U.S. Air Forc ...
recorded of rainfall on October 28 and October 29 due to Warren. The heavy rains over the Philippines led to landslides which killed 42 people. The passenger ferry ''MV Venus'' capsized on October 28, which led to an additional 36 deaths. The 930-ton ship ''Lorenzo Container VIII'' sank that day, which led to eight missing crew members.
Another surge in the low-level northeast flow to Warren's north led to an expansion of its wind field. This cooler and drier air was also weakening the cyclone. On October 30, the storm turned west-southwest and continued weakening. By October 31 Warren had weakened to a tropical depression and it dissipated as a tropical cyclone over water. Its remaining convection moved into central Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
on November 1. Its weakening center led to gales along the coast. By November 2, Warren's circulation center dissipated.[Joint Typhoon Warning Center (1985)]
Typhoon Warren.
Retrieved on 2007-02-04.
Tropical Depression Seniang
Typhoon Agnes (Undang)
This system began as an area of convection along the equator on October 28. Moving northwest, the system developed. On November 1, the system became a tropical depression and then strengthened into a tropical storm. The storm turned west-northwest due to a broad ridge to its north. Intensifying into a typhoon, Agnes became an intense typhoon as it approached the Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
. Two months after Typhoon Ike hit the central Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
, Typhoon Agnes struck just south of Borongan on November 4. It crossed the islands and briefly weakened. Strengthening began as it moved through the South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
. It hit Quinhon, Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
as a typhoon on November 7. Once onshore, Anges weakened rapidly before dissipating on November 8.
Across the Philippines, Agnes wrought catastrophic damage. A total of 201,014 homes were destroyed and another 163,506 were damaged, with losses amounting to 1.9 billion pesos (US$96.6 million). At least 895 people perished in the storm while 275 others were reported missing. Another 2,526 people were injured by the storm. Altogether, approximately 1.9 million people were affected by the typhoon. Extensive damage also took place in Vietnam where at least 134 people were killed. At least 30,000 homes were destroyed and another 120,000 were flooded or damaged.
Typhoon Bill (Welpring)
An area of convection organized into a tropical depression on November 8 while east of Guam
Guam (; ch, Guåhan ) is an organized, unincorporated territory of the United States in the Micronesia subregion of the western Pacific Ocean. It is the westernmost point and territory of the United States (reckoned from the geographic cent ...
. It executed a small loop, reached tropical storm strength later on the 8th, and reached typhoon intensity on the 11th. Bill continued to strengthen as it tracked westward, reaching maximum sustained winds of on the 14th. Strong upper-level winds weakened the storm, and as a break in the subtropical ridge brought the storm northward, upper-level winds from Typhoon Clara weakened Bill to a tropical storm on the 18th. It looped southeastward while just east of Luzon
Luzon (; ) is the largest and most populous island in the Philippines. Located in the northern portion of the Philippines archipelago, it is the economic and political center of the nation, being home to the country's capital city, Manila, as ...
, and looped again to the southwest on the 20th. Bill dissipated as a tropical cyclone on the November 22, after causing minor damage on its path.
Typhoon Clara (Yoning)
A large, low-latitude disturbance formed in the eastern Caroline islands
The Caroline Islands (or the Carolines) are a widely scattered archipelago of tiny islands in the western Pacific Ocean, to the north of New Guinea. Politically, they are divided between the Federated States of Micronesia (FSM) in the centra ...
on November 11. By November 13, the surface low was gaining significant amounts of convection. Its circulation was aided by a tropical disturbance to its south in the Solomon islands
Solomon Islands is an island country consisting of six major islands and over 900 smaller islands in Oceania, to the east of Papua New Guinea and north-west of Vanuatu. It has a land area of , and a population of approx. 700,000. Its capita ...
which enhanced westerly flow between the two systems, increasing the low level vorticity within the northern hemisphere system. Consolidation of the system began, and the system became a tropical depression on November 14. Further development of this system into a tropical storm and typhoon was accompanied by an expansion in the size of its circulation. As Clara recurved east of 132E, it passed within of Bill, which radically changed Bill's course and weakened both cyclones. Once Bill moved farther away, Clara reintensified into a strong typhoon by November 20. Recurvature of Clara continued, and it became an extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of ...
along an approaching frontal zone, and was able to be followed through November 22. Iwo-Jima reported winds with gusts to as Clara passed by to the north.
Typhoon Doyle (Aring)
Its initial tropical disturbance was first noted near 5N 156E on December 1. The system moved west-northwest, slowly developing. A low-level circulation in the Coral Sea
The Coral Sea () is a marginal sea of the South Pacific off the northeast coast of Australia, and classified as an interim Australian bioregion. The Coral Sea extends down the Australian northeast coast. Most of it is protected by the Fre ...
helped enhance westerly flow to its south, which developed into a tropical depression late on December 4 and a tropical storm early on December 5. Intensification continued, and typhoon strength was reached late on December 6. Turning more northwest, the typhoon became intense early on December 8. As it recurved northward, the cyclone weakened quickly late on December 9 and early on December 10. The cyclone became an exposed circulation, and dissipated as a tropical cyclone over water late on December 11.[Joint Typhoon Warning Center]
Typhoon Doyle.
Retrieved on 2007-02-03.
Storm names
During the season 27 named tropical cyclones developed in the Western Pacific and were named by the Joint Typhoon Warning Center, when it was determined that they had become tropical storms. These names were contributed to a revised list which started on 1979.
Philippines
The uses its own naming scheme for tropical cyclones in their area of responsibility. PAGASA assigns names to tropical depressions that form within their area of responsibility and any tropical cyclone that might move into their area of responsibility. Should the list of names for a given year prove to be insufficient, names are taken from an auxiliary list, the first 6 of which are published each year before the season starts. Names not retired from this list will be used again in the 1988 season. This is the same list used for the 1980 season. PAGASA uses its own naming scheme that starts in the Filipino alphabet
The modern Filipino alphabet ( fil, makabagong alpabetong Filipino), otherwise known as the Filipino alphabet ( fil, alpabetong Filipino), is the alphabet of the Filipino language, the official national language and one of the two official langua ...
, with names of Filipino female names ending with "ng" (A, B, K, D, etc.). Names that were not assigned/going to use are marked in .
Retirement
International
Due to a high death toll caused by Typhoon Ike, the name ''Ike'' was later retired and was replaced by ''Ian'' and was first used in the 1987 season.
Philippines
PAGASA retired the names '' Nitang'' and ''Undang
An Undang is a ruling chief or territorial chief who still play an important role in the state of Negeri Sembilan, Malaysia. The name is believed to be derived from the Malay word ''undang-undang'' meaning "law".
The Minangkabau who settled at N ...
'', and was replaced with ''Ningning'' and ''Unsang'' for the 1988 season. The name ''Aring'' was also decommissioned from the auxiliary list and replaced with ''Apiang'', possibly because of a storm with the same name that caused destruction in Luzon in 1980
Season effects
This is a table of all of the storms that have formed in the 1984 Pacific typhoon season. It includes their duration, names, affected areas, damages, and death totals. Deaths in parentheses are additional and indirect (an example of an indirect death would be a traffic accident), but were still related to that storm. Damage and deaths include totals while the storm was extratropical, a wave, or a low, and all of the damage figures are in 1984 USD. Names listed in parentheses were assigned by PAGASA.
, -
, Vernon , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Vietnam, , None , , None , ,
, -
, Wynne (Asiang) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Philippines, Taiwan, South China, , None , , , ,
, -
, Alex (Biring) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Philippines, Taiwan, East China, South Korea , , None , , None , ,
, -
, Betty (Konsing) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Philippines, South China, , None , , None , ,
, -
, Cary , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Mariana Islands , , None , , None , ,
, -
, Dinah , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , , , None , ,
, -
, Ed , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Japan, Northeast China , , None , , , ,
, -
, TD , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Vietnam, South China , , None , , None , ,
, -
, TD , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , South China , , None , , None , ,
, -
, TD , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, Freda (Ditang) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Philippines, Taiwan, China, Ryukyu Islands , , None , , , ,
, -
, 09W (Edeng) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Philippines, Taiwan , , None , , None , ,
, -
, TD , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, Gloring , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, Gerald (Huaning) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , South China , , None , , , ,
, -
, Holly (Isang) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Japan, Korean Peninsula , , None , , , ,
, -
, TD , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Mariana Islands, Japan , , None , , None , ,
, -
, 12W (Lusing) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, Ike (Nitang) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Caroline Islands, Philippines, South China , , , , , ,
, -
, June (Maring) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Philippines, Taiwan, China , , None , , , ,
, -
, Moke , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, TD , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, Kelly , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, TD , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Mariana Islands , , None , , None , ,
, -
, Lynn , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Vietnam , , None , , None , ,
, -
, Osang , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Caroline Islands , , None , , None , ,
, -
, Maury , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, Nina , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, TD , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, TD , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None, , None , , None , ,
, -
, Ogden , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, Phyllis , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , None , , None , , None , ,
, -
, Roy , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Mariana Islands , , None , , None , ,
, -
, Susan , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Vietnam , , None , , , ,
, -
, 23W , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Caroline Islands , , None , , None , ,
, -
, Paring , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Philippines , , None , , None , ,
, -
, Thad , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Caroline Islands, Mariana Islands , , None , , None , ,
, -
, Vanessa (Toyang) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Caroline Islands, Mariana Islands, Philippines , , , , , ,
, -
, Warren (Reming) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Philippines, Vietnam , , None , , , ,
, -
, Seniang , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Philippines, Taiwan , , None , , None , ,
, -
, Agnes (Undang) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Caroline Islands, Philippines, Vietnam, Cambodia , , , , , ,
, -
, Bill (Welpring) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Caroline Islands, Mariana Islands, Philippines , , None , , None , ,
, -
, Clara (Yoning) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Caroline Islands , , None , , None , ,
, -
, Doyle (Aring) , , , , bgcolor=#, , , bgcolor=#, , , bgcolor=#, , , Caroline Islands , , None , , None , ,
, -
See also
* 1984 Pacific hurricane season
The 1984 Pacific hurricane season featured numerous tropical cyclones, several of which were impactful to land. It was a busy hurricane season with 21 named storms, 13 hurricanes, and 7 major hurricanes, the latter of which are Category 3 or ...
* 1984 Atlantic hurricane season
The 1984 Atlantic hurricane season was the most active since 1971, though the season was below average in hurricanes and major hurricanes. It officially began on June 1, 1984, and lasted until November 30, 1984. These dates conventionally delimi ...
* 1984 North Indian Ocean cyclone season
The 1984 North Indian Ocean cyclone season was part of the annual cycle of tropical cyclone formation. The season has no official bounds but cyclones tend to form between April and December. These dates conventionally delimit the period of each yea ...
* Southern Hemisphere tropical cyclone seasons: 1983–84, 1984–85
References
External links
Japan Meteorological Agency
Joint Typhoon Warning Center
.
National Weather Service Guam
Macau Meteorological Geophysical Services
Philippine Atmospheric, Geophysical and Astronomical Services Administration
1984 Pacific typhoon season satellite movie
{{DEFAULTSORT:1984 Pacific Typhoon Season
Articles which contain graphical timelines
1984 WPAC