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The 1998 Pacific hurricane season was a below average
Pacific hurricane season A Pacific hurricane is a mature tropical cyclone that develops within the northeastern and central Pacific Ocean to the east of 180°W, north of the equator. For tropical cyclone warning purposes, the northern Pacific is divided into three regio ...
. Despite this, it had nine hurricanes and six major hurricanes, which was well above average. The season officially started on May 15 in the eastern Pacific and on June 1 in the central Pacific, and ended on November 30; these dates conventionally delimit the period during which most tropical cyclones form in that region. The first tropical cyclone developed on June 11, about ten days later than the normal start of the season. The final storm of the year, Hurricane Madeline, dissipated on October 20. Storm activity in 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 ...
's warning zone was low, with just one tropical depression observed in the region. Two tropical cyclones from the eastern Pacific (Darby and Estelle) also entered the central Pacific; the former did so as a hurricane. The most notable
tropical cyclone 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 ...
of the year was Hurricane Isis, which killed fourteen people when it made
landfall Landfall is the event of a storm moving over land after being over water. More broadly, and in relation to human travel, it refers to 'the first land that is reached or seen at the end of a journey across the sea or through the air, or the fact ...
on southern
Baja California Sur Baja California Sur (; 'South Lower California'), officially the Free and Sovereign State of Baja California Sur ( es, Estado Libre y Soberano de Baja California Sur), is the least populated state and the 31st admitted state of the 32 federal ent ...
and coastal
Sinaloa Sinaloa (), officially the Estado Libre y Soberano de Sinaloa ( en, Free and Sovereign State of Sinaloa), is one of the 31 states which, along with Mexico City, comprise the Administrative divisions of Mexico, Federal Entities of Mexico. It is d ...
in Mexico. Isis caused considerable damage in the nation while destroying more than 700 homes and damaging dozens of cars. It later produced sporadic rainfall in the southwestern United States, leading to some traffic accidents. In addition to Isis, Tropical Storm Javier moved ashore the coast of
Jalisco Jalisco (, , ; Nahuatl: Xalixco), officially the Free and Sovereign State of Jalisco ( es, Estado Libre y Soberano de Jalisco ; Nahuatl: Tlahtohcayotl Xalixco), is one of the 31 states which, along with Mexico City, comprise the 32 Federal En ...
in Mexico; the country also experienced indirect effects from four other storms, all of which remained offshore. One tropical cyclone, Hurricane Lester, affected Central America, causing two deaths in
Guatemala Guatemala ( ; ), officially the Republic of Guatemala ( es, República de Guatemala, links=no), is a country in Central America. It is bordered to the north and west by Mexico; to the northeast by Belize and the Caribbean; to the east by H ...
, and later brought heavy rains to southern Mexico. Three tropical cyclones brought light to moderate rainfall to the southwestern United States, and one hurricane produced rough surf along the coast of California. Hurricane Madeline contributed to a deadly and costly flood in southern Texas.


Seasonal summary

ImageSize = width:800 height:215 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:01/06/1998 till:01/12/1998 TimeAxis = orientation:horizontal ScaleMinor = grid:black unit:month increment:1 start:01/06/1998 Colors = id:canvas value:gray(0.88) id:GP value:red id:TD value:rgb(0.38,0.73,1) legend:Tropical_Depression_=_≤39_mph_(≤62_km/h) id:TS value:rgb(0,0.98,0.96) legend:Tropical_Storm_=_39–73_mph_(63–117_km/h) id:C1 value:rgb(1,1,0.80) legend:Category_1_=_74–95_mph_(118–153_km/h) id:C2 value:rgb(1,0.91,0.46) legend:Category_2_=_96–110_mph_(154–177_km/h) id:C3 value:rgb(1,0.76,0.25) legend:Category_3_=_111–129_mph_(178–208_km/h) id:C4 value:rgb(1,0.56,0.13) legend:Category_4_=_130–156_mph_(209–251_km/h) id:C5 value:rgb(1,0.38,0.38) legend:Category_5_=_≥157_mph_(≥252_km/h) Backgroundcolors = canvas:canvas BarData = barset:Hurricane bar:Month PlotData= barset:Hurricane width:10 align:left fontsize:S shift:(4,-4) anchor:till from:11/06/1998 till:16/06/1998 color:TS text:"Agatha (TS)" from:19/06/1998 till:22/06/1998 color:TD text:"Two-E (TD)" from:22/06/1998 till:30/06/1998 color:C4 text:"Blas (C4)" from:17/07/1998 till:21/07/1998 color:TS text:"Celia (TS)" from:23/07/1998 till:01/08/1998 color:C3 text:"Darby (C3)" from:29/07/1998 till:08/08/1998 color:C4 text:"Estelle (C4)" from:06/08/1998 till:10/08/1998 color:TS text:"Frank (TS)" from:11/08/1998 till:17/08/1998 color:C3 text:"Georgette (C3)" barset:break from:16/08/1998 till:18/08/1998 color:TD text:"One-C" from:20/08/1998 till:30/08/1998 color:C4 text:"Howard (C4)" from:01/09/1998 till:03/09/1998 color:C1 text:" Isis (C1)" from:06/09/1998 till:14/09/1998 color:TS text:"Javier (TS)" from:01/10/1998 till:03/10/1998 color:TD text:"Twelve-E (TD)" from:13/10/1998 till:17/10/1998 color:C1 text:"Kay (C1)" from:15/10/1998 till:26/10/1998 color:C3 text:" Lester (C3)" from:16/10/1998 till:20/10/1998 color:C1 text:" Madeline (C1)" bar:Month width:5 align:center fontsize:S shift:(0,-20) anchor:middle color:canvas from:01/06/1998 till:01/07/1998 text:June from:01/07/1998 till:01/08/1998 text:July from:01/08/1998 till:01/09/1998 text:August from:01/09/1998 till:01/10/1998 text:September from:01/10/1998 till:01/11/1998 text:October from:01/11/1998 till:01/12/1998 text:November TextData = pos:(570,30) text:"(From the" pos:(617,30) text:" Saffir–Simpson hurricane wind scale)"
The season produced 13 named storms, slightly below the average of 15 named storms per season. However, the season total of nine hurricanes was one above the average, and the total of six major hurricanes surpassed the average of three. Activity during the season was hindered by the northward movement of the
Intertropical Convergence Zone The Intertropical Convergence Zone (ITCZ ), known by sailors as the doldrums or the calms because of its monotonous windless weather, is the area where the northeast and the southeast trade winds converge. It encircles Earth near the thermal e ...
(ITCZ). The ITCZ, which is normally situated south of the
Gulf of Tehuantepec Gulf of Tehuantepec () is a large body of water on the Pacific coast of the Isthmus of Tehuantepec, southeastern Mexico, at . Many (but not all) Pacific hurricanes form in or near this body of water. A strong, gale-force wind called the Tehuan ...
, shifted northward into Central and Southern Mexico, making the cyclone closer to cooler
sea surface temperatures Sea surface temperature (SST), or ocean surface temperature, is the ocean temperature close to the surface. The exact meaning of ''surface'' varies according to the measurement method used, but it is between and below the sea surface. Air masse ...
, hence limiting the number of storms that formed during the season. Although a semi-permanent
anticyclone An anticyclone is a weather phenomenon defined as a large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere as viewed from abov ...
persisted through the summer of 1998, causing most of the storms to remain at sea, some storm did threaten the Baja California Peninsula due to a weakness in the anticyclone. Except for
Hurricane Kay The name Kay has been used for seven tropical cyclones in the Eastern Pacific Ocean and for one in the Australian region. In the Eastern Pacific: * Hurricane Kay (1980) – Category 4 hurricane that tracked along an irregular but generally west-no ...
, all of the storms of the season originated from
tropical waves A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
.
Accumulated Cyclone Energy Accumulated cyclone energy (ACE) is a metric used by various agencies to express the energy released by a tropical cyclone during its lifetime. It is calculating by summing the square of a tropical cyclone's maximum sustained winds, measured ever ...
is, broadly speaking, a measure of the power of a storm multiplied by its duration, so longer-lived hurricanes have higher ACEs. The total ACE for the season was 133.97 × 104 kt2. Because several storms in 1998 were long-lasting or intense, the season's ACE was near-normal. Hurricane Howard had the highest ACE, measuring 29.27 x 104 kt2.


Systems


Tropical Storm Agatha

A poorly defined
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
crossed Central America into the eastern Pacific Ocean on June 8. As it tracked westward under the influence of a
ridge A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The line ...
to its north, a broad circulation developed. Gradually, the dominant center of circulation became better defined, with increasingly organized convection and developing banding features. By early on June 11, the center became sufficiently associated with the convection for the
National Hurricane Center The National Hurricane Center (NHC) is the division of the United States' NOAA/National Weather Service responsible for tracking and predicting tropical weather systems between the Prime Meridian and the 140th meridian west poleward to the 3 ...
(NHC) to classify the system as Tropical Depression One-E. This occurred while the area of unsettled weather was about 460 miles (765 km) south-southwest of
Acapulco Acapulco de Juárez (), commonly called Acapulco ( , also , nah, Acapolco), is a city and major seaport in the state of Guerrero on the Pacific Coast of Mexico, south of Mexico City. Acapulco is located on a deep, semicircular bay and has bee ...
, Mexico. The center of the depression was not initially well defined, with restricted
outflow Outflow may refer to: *Capital outflow, the capital leaving a particular economy *Bipolar outflow, in astronomy, two continuous flows of gas from the poles of a star *Outflow (hydrology), the discharge of a lake or other reservoir system * Outflow ...
in the eastern half of the circulation. As such, the depression failed to attain any significant organization in the days subsequent to its formation. Later, an approaching tropical wave merged with the depression, resulting in a trend of intensification and increased organization. By June 13, the NHC upgraded the depression to
tropical storm 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 ...
status, and gave it the name "Agatha". Agatha was about 650 miles (1050 km) south-southeast of
Cabo San Lucas Cabo San Lucas (, "Saint Luke Cape"), or simply just Cabo, is a resort city at the southern tip of the Baja California Peninsula, in the Mexican state of Baja California Sur. As at the 2020 Census, the population of the city was 202,694 inhabitan ...
when it became a tropical storm. As Agatha became a tropical storm, forecasters predicted that it would not strengthen further, due to its forecast track passing over cooler waters. However, Agatha quickly strengthened, developing a curved band of
convection Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). When the cause of the convec ...
wrapping around its center, and early on June 11 it attained a peak intensity of 65 mph (100 km/h) while about 615 miles (985 km) southwest of the southern tip of
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
. Agatha maintained peak winds for about 12 hours before moving over colder waters and gradually weakening. On June 15, it degenerated back into a tropical depression, and a day later, it dissipated over the open waters of the Pacific Ocean. The storm never affected land.


Tropical Depression Two-E

A few days later, another westward-moving tropical disturbance paralleled the southern coast of Central America and
Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...
. Convection in the area organized steadily, and late on June 19, the system developed into Tropical Depression Two-E about 260 miles (420 km) south-southwest of Manzanillo, Mexico. On becoming a tropical depression, the system maintained a large, elongated, low-level circulation with some banding features and restricted
outflow Outflow may refer to: *Capital outflow, the capital leaving a particular economy *Bipolar outflow, in astronomy, two continuous flows of gas from the poles of a star *Outflow (hydrology), the discharge of a lake or other reservoir system * Outflow ...
due to
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 ...
. The
National Hurricane Center The National Hurricane Center (NHC) is the division of the United States' NOAA/National Weather Service responsible for tracking and predicting tropical weather systems between the Prime Meridian and the 140th meridian west poleward to the 3 ...
first predicted that the depression would intensify, reaching winds of 50 mph (80 km/h), though two
computer models Computer simulation is the process of mathematical modelling, performed on a computer, which is designed to predict the behaviour of, or the outcome of, a real-world or physical system. The reliability of some mathematical models can be deter ...
projected it to quickly dissipate. Under the influence of a
ridge A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The line ...
over Mexico, the depression moved to the west-northwest, and, under the influence of increasing wind shear, the depression failed to organize significantly. By June 20, the circulation center was partially exposed, and was located to the northeast of the primary convection – traits that signal a weak storm. Two-E approached tropical storm status, though deep convection waned after the system moved over cooler waters. On June 21, the National Hurricane Center issued the last advisory on the depression, stating that the depression maintained a very well-defined, low-level circulation, but had no convection associated with the system. Locally heavy rains fell across southwest Mexico in association with this system, peaking at at Las Gaviotas/Compostela.


Hurricane Blas

On June 8, a
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
emerged off the coast of Africa. The wave remained weak and nondescript as it crossed the Atlantic Ocean and entered the eastern Pacific Ocean on June 19. An area of convection developed and organized along the wave's axis, and the National Hurricane Center began to employ Dvorak classifications on June 20. Convective banding features increased as the broad circulation became better defined, and on June 22, the disturbance developed into Tropical Depression Three-E about 575 miles (925 km) south of the
Gulf of Tehuantepec Gulf of Tehuantepec () is a large body of water on the Pacific coast of the Isthmus of Tehuantepec, southeastern Mexico, at . Many (but not all) Pacific hurricanes form in or near this body of water. A strong, gale-force wind called the Tehuan ...
. Well-defined steering currents resulted in a general west-northwestward movement. Deep convection concentrated near the center, and about 12 hours after becoming a tropical depression, the system strengthened into Tropical Storm Blas about 400 miles (640 km) south of
Puerto Angel, Oaxaca Puerto, a Spanish word meaning ''seaport'', may refer to: Places *El Puerto de Santa María, Andalusia, Spain *Puerto, a seaport town in Cagayan de Oro City, Philippines *Puerto Colombia, Colombia *Puerto Cumarebo, Venezuela *Puerto Galera, Orient ...
. Tropical Storm Blas continued to organize as it moved parallel to the
Mexican Mexican may refer to: Mexico and its culture *Being related to, from, or connected to the country of Mexico, in North America ** People *** Mexicans, inhabitants of the country Mexico and their descendants *** Mexica, ancient indigenous people ...
coast. Banding features increased, and on June 23 the storm attained hurricane status about 345 miles (555 km) southwest of
Acapulco Acapulco de Juárez (), commonly called Acapulco ( , also , nah, Acapolco), is a city and major seaport in the state of Guerrero on the Pacific Coast of Mexico, south of Mexico City. Acapulco is located on a deep, semicircular bay and has bee ...
. The next day, an
eye Eyes are organs of the visual system. They provide living organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and conv ...
developed and became apparent on satellite imagery, while upper-level outflow became better defined. Blas quickly strengthened and reached its peak intensity on June 25, with maximum sustained winds of 140 mph (225 km/h), while about 575 miles (925 km) south-southeast of the southern tip of
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
. Temperatures warmed in the convection around the eye, though the eye remained visible for several days as Blas turned west under the influence of a
ridge A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The line ...
to its north. On June 28, it degenerated into a tropical storm after entering an area of cooler water. Blas weakened to a tropical depression on June 30, and a day later was considered to have dissipated due to a lack of convection near the center. A remnant low-level cloud swirl persisted for several days, passing well to the south of Hawaii on July 5 before dissipating. The
Associated Press The Associated Press (AP) is an American non-profit news agency headquartered in New York City. Founded in 1846, it operates as a cooperative, unincorporated association. It produces news reports that are distributed to its members, U.S. newspa ...
attributed 4 deaths from a
mudslide A mudflow or mud flow is a form of mass wasting involving fast-moving flow of debris that has become liquified by the addition of water. Such flows can move at speeds ranging from 3 meters/minute to 5 meters/second. Mudflows contain a significa ...
in
Michoacán Michoacán, formally Michoacán de Ocampo (; Purépecha: ), officially the Free and Sovereign State of Michoacán de Ocampo ( es, Estado Libre y Soberano de Michoacán de Ocampo), is one of the 32 states which comprise the Federal Entities of ...
to Blas. However, as the primary convection remained offshore, the National Hurricane Center did not consider the deaths related to the hurricane. The threat of Blas prompted officials in
Acapulco Acapulco de Juárez (), commonly called Acapulco ( , also , nah, Acapolco), is a city and major seaport in the state of Guerrero on the Pacific Coast of Mexico, south of Mexico City. Acapulco is located on a deep, semicircular bay and has bee ...
to close the port to all navigation.


Tropical Storm Celia

On July 1, another
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
emerged off the coast of Africa. It moved westward due to strong
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 ...
without further organization, and crossed Central America into the eastern Pacific Ocean on July 11. An area of organizing
convection Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). When the cause of the convec ...
developed along the wave axis, and Dvorak classifications began on July 13, while the tropical wave was south of the
Gulf of Tehuantepec Gulf of Tehuantepec () is a large body of water on the Pacific coast of the Isthmus of Tehuantepec, southeastern Mexico, at . Many (but not all) Pacific hurricanes form in or near this body of water. A strong, gale-force wind called the Tehuan ...
. The cloud pattern soon became disorganized, and the area of disturbed weather continued west-northwestward. On July 16, convection increased and organized into banding features; early on July 17, the system developed into Tropical Depression Four-E about 150 miles (240 km) south of
Manzanillo, Mexico Manzanillo () is a city and seat of Manzanillo Municipality, in the Mexican state of Colima. The city, located on the Pacific Ocean, contains Mexico's busiest port, responsible for handling Pacific cargo for the Mexico City area. It is the large ...
. Soon after becoming a tropical depression, the storm rapidly organized and intensified into Tropical Storm Celia six hours after becoming a tropical depression. The tropical storm initially moved northwestward, and briefly threatened southern
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
. As a result, the government of
Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...
issued a
tropical storm warning Tropical cyclone warnings and watches are alerts issued by national weather forecasting bodies to coastal areas threatened by the imminent approach of a tropical cyclone of tropical storm or hurricane intensity. They are notices to the local popul ...
on July 18 for
La Paz La Paz (), officially known as Nuestra Señora de La Paz (Spanish pronunciation: ), is the seat of government of the Bolivia, Plurinational State of Bolivia. With an estimated 816,044 residents as of 2020, La Paz is the List of Bolivian cities ...
southward. Shortly thereafter, a mid- to upper-level
anticyclone An anticyclone is a weather phenomenon defined as a large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere as viewed from abov ...
turned Celia to the west-northwest and forced it to pass about 150 miles (240 km) south-southwest of
Cabo San Lucas Cabo San Lucas (, "Saint Luke Cape"), or simply just Cabo, is a resort city at the southern tip of the Baja California Peninsula, in the Mexican state of Baja California Sur. As at the 2020 Census, the population of the city was 202,694 inhabitan ...
. On July 19, Celia attained maximum sustained winds of 60 mph (95 km/h) before moving over cooler waters and diminishing in convection. The storm degenerated into a tropical depression on July 20, and Celia dissipated early on July 21, well away from the Mexican coastline. The precursor tropical disturbance produced locally heavy rainfall along the south coast of
Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...
. Authorities in Mexico closed the port at
Acapulco Acapulco de Juárez (), commonly called Acapulco ( , also , nah, Acapolco), is a city and major seaport in the state of Guerrero on the Pacific Coast of Mexico, south of Mexico City. Acapulco is located on a deep, semicircular bay and has bee ...
to small fishing and recreational boats, and advised larger craft to use caution. Damage from the storm, if any, is unknown.


Hurricane Darby

A
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
moved off the coast of Africa on July 4. It tracked westward across the Atlantic Ocean with little increase in
convection Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). When the cause of the convec ...
, and crossed Central America into the Pacific Ocean on July 16. Three days later, convection began to increase along the wave axis while the wave was well to the south of
Acapulco Acapulco de Juárez (), commonly called Acapulco ( , also , nah, Acapolco), is a city and major seaport in the state of Guerrero on the Pacific Coast of Mexico, south of Mexico City. Acapulco is located on a deep, semicircular bay and has bee ...
, Mexico. On July 21, Dvorak classifications began as the cloud pattern displayed curvature on satellite images. Convective banding features gradually developed, and it is estimated that the system organized into Tropical Depression Five-E early on July 23 about 720 miles (1160 km) south of the southern tip of the Baja California peninsula. Under the influence of a mid- to upper-level
ridge A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The line ...
to its north, the depression tracked west-northwestward. Convection became more concentrated as
outflow Outflow may refer to: *Capital outflow, the capital leaving a particular economy *Bipolar outflow, in astronomy, two continuous flows of gas from the poles of a star *Outflow (hydrology), the discharge of a lake or other reservoir system * Outflow ...
organized further, and 18 hours after the depression first developed, it intensified into Tropical Storm Darby. Located in an area conducive to further development, Darby attained hurricane status on July 24, subsequent to the development of a 17-mile (27 km)-wide
eye Eyes are organs of the visual system. They provide living organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and conv ...
. The eye became more distinct while surrounded by an area of deep convection, and on July 25 the hurricane reached peak winds of 115 mph (185 km/h) about 850 miles (1370 km) southwest of
Cabo San Lucas Cabo San Lucas (, "Saint Luke Cape"), or simply just Cabo, is a resort city at the southern tip of the Baja California Peninsula, in the Mexican state of Baja California Sur. As at the 2020 Census, the population of the city was 202,694 inhabitan ...
. The eye soon disappeared on satellite imagery, believed to be from an
eyewall replacement cycle In meteorology, eyewall replacement cycles, also called concentric eyewall cycles, naturally occur in intense tropical cyclones, generally with winds greater than , or major hurricanes ( Category 3 or above). When tropical cyclones reach this int ...
, and Darby's winds weakened to about 105 mph (170 km/h). A 25-mile (40 km) eye next developed, and on July 26, the hurricane re-intensified to reach peak winds of 115 mph (185 km/h). For a 30-hour period, Darby attained the characteristics of an
annular hurricane An annular tropical cyclone is a tropical cyclone that features a normal to large, symmetric eye surrounded by a thick and uniform ring of intense convection, often having a relative lack of discrete rainbands, and bearing a symmetric appearance ...
, retaining a well-defined structure with few banding features for an extended period. The hurricane began to weaken while entering an area of cooler water and increased
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 ...
, and after crossing into the jurisdiction of 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 ...
, Darby weakened to a tropical storm on July 29. The storm degenerated into a tropical depression on July 31, and early on August 1, Darby dissipated a moderate distance north of the
Hawaiian Islands The Hawaiian Islands ( haw, Nā Mokupuni o Hawai‘i) are an archipelago of eight major islands, several atolls, and numerous smaller islets in the North Pacific Ocean, extending some from the island of Hawaii in the south to northernmost Kur ...
. It never affected land.


Hurricane Estelle

On July 18, a
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
exited the western coast of Africa, and moved westward across the Atlantic Ocean with sporadic convection but no development. The wave moved across the
Caribbean Sea The Caribbean Sea ( es, Mar Caribe; french: Mer des Caraïbes; ht, Lanmè Karayib; jam, Kiaribiyan Sii; nl, Caraïbische Zee; pap, Laman Karibe) is a sea of the Atlantic Ocean in the tropics of the Western Hemisphere. It is bounded by Mexico ...
and the southern
Gulf of Mexico The Gulf of Mexico ( es, Golfo de México) is an oceanic basin, ocean basin and a marginal sea of the Atlantic Ocean, largely surrounded by the North American continent. It is bounded on the northeast, north and northwest by the Gulf Coast of ...
before crossing Central America into the eastern Pacific Ocean on July 28. Early on July 29, Dvorak classifications began on the system, and subsequent to the formation of banding features and a surface circulation, the system developed into Tropical Depression Six-E about 170 miles (275 km) southeast of
Manzanillo, Mexico Manzanillo () is a city and seat of Manzanillo Municipality, in the Mexican state of Colima. The city, located on the Pacific Ocean, contains Mexico's busiest port, responsible for handling Pacific cargo for the Mexico City area. It is the large ...
. The depression continued to organize, with increasing
convection Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). When the cause of the convec ...
and distinct upper-level
outflow Outflow may refer to: *Capital outflow, the capital leaving a particular economy *Bipolar outflow, in astronomy, two continuous flows of gas from the poles of a star *Outflow (hydrology), the discharge of a lake or other reservoir system * Outflow ...
, and early on July 30 the depression intensified into Tropical Storm Estelle. Tropical Storm Estelle gradually intensified as it tracked west-northwestward, a motion caused by a large
anticyclone An anticyclone is a weather phenomenon defined as a large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere as viewed from abov ...
to its north. On July 31, the storm attained hurricane status about 550 miles (885 km) south-southeast of the southern tip of
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
. Its intensification continued as a well-defined
eye Eyes are organs of the visual system. They provide living organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and conv ...
about 30 miles (48 km) in diameter became visible on satellite imagery, and on August 2 Estelle reached its peak intensity of 135 mph (215 km/h). The hurricane soon began to weaken as deep convection diminished and the eye disappeared on satellite imagery. Two days after peaking in intensity, Estelle weakened to tropical storm status. Late on August 4, the convection associated with the storm dissipated, and the next day the storm weakened to tropical depression status. Convection briefly re-developed on August 6, though increased
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 ...
and cooler water weakened the depression further. Two days later, Estelle dissipated about 400 miles (645 km) east-northeast of the
Hawaiian Islands The Hawaiian Islands ( haw, Nā Mokupuni o Hawai‘i) are an archipelago of eight major islands, several atolls, and numerous smaller islets in the North Pacific Ocean, extending some from the island of Hawaii in the south to northernmost Kur ...
. High surf from Estelle impacted southern California, resulting in a number of lifeguard rescues. The storm disrupted the
trade wind The trade winds or easterlies are the permanent east-to-west prevailing winds that flow in the Earth's equatorial region. The trade winds blow mainly from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisph ...
s around Hawaii, resulting in light winds and rain showers on
Kauai Kauai, () anglicized as Kauai ( ), is geologically the second-oldest of the main Hawaiian Islands (after Niʻihau). With an area of 562.3 square miles (1,456.4 km2), it is the fourth-largest of these islands and the 21st largest island ...
and
Oahu Oahu () (Hawaiian language, Hawaiian: ''Oʻahu'' ()), also known as "The Gathering place#Island of Oʻahu as The Gathering Place, Gathering Place", is the third-largest of the Hawaiian Islands. It is home to roughly one million people—over t ...
.


Tropical Storm Frank

On July 19, a
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
moved off the coast of Africa. A mid-level circulation developed to the south of
Cape Verde , national_anthem = () , official_languages = Portuguese , national_languages = Cape Verdean Creole , capital = Praia , coordinates = , largest_city = capital , demonym ...
on July 22, though the wave became less distinct as it continued westward. The wave axis crossed Central America into the eastern Pacific Ocean on July 31. Convection steadily increased, though it was not until August 4 that the convection began to organize. Dvorak classifications began on August 4, and subsequent to the formation of a low-level circulation the system developed into Tropical Depression Seven-E on August 6 about 550 miles (885 km) south of the southern tip of the Baja California Peninsula. The depression tracked generally northward, under the influence of a
ridge A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The line ...
over
Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...
and a mid-level
trough Trough may refer to: In science * Trough (geology), a long depression less steep than a trench * Trough (meteorology), an elongated region of low atmospheric pressure * Trough (physics), the lowest point on a wave * Trough level (medicine), the l ...
to its west. The center of the depression was initially elongated, with northerly
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 ...
impacting the structure of the cyclone. This at first prevented further strengthening, though convection increased and organized into banding features as it moved through an area of warm water. On August 8, the depression intensified into Tropical Storm Frank, and it soon turned to the north-northwest, brushing the western coastline of
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
. On August 9, Frank reached peak winds of 45 mph (75 km/h) about 105 miles (170 km) west-northwest of
Ciudad Constitución Ciudad Constitución is a city in the Mexican state of Baja California Sur. It is the seat of Comondú Municipality. As of 2019, the city had a total population of 45,888 inhabitants. Ciudad Constitución is a small city which serves as a gateway ...
. It turned to the northwest, with a portion of the circulation of the land, and steadily weakened after moving over cooler water. On August 10, Frank dissipated a short distance off Baja California. On August 8, the government of Mexico issued a
tropical storm warning Tropical cyclone warnings and watches are alerts issued by national weather forecasting bodies to coastal areas threatened by the imminent approach of a tropical cyclone of tropical storm or hurricane intensity. They are notices to the local popul ...
for portions of the southwestern Baja California Peninsula. Officials ordered the evacuation of some residents near
Cabo San Lucas Cabo San Lucas (, "Saint Luke Cape"), or simply just Cabo, is a resort city at the southern tip of the Baja California Peninsula, in the Mexican state of Baja California Sur. As at the 2020 Census, the population of the city was 202,694 inhabitan ...
, whose port was closed, due to the threat of mudslides. Gusty winds and moderate rainfall were reported in a localized area of Baja California Sur, with rainfall peaking at 9.61 inches (244 mm) at Santa Anita, near
Los Cabos LOS, or Los, or LoS may refer to: Science and technology * Length of stay, the duration of a single episode of hospitalisation * Level of service, a measure used by traffic engineers * Level of significance, a measure of statistical significance ...
. Moisture from Frank extended into the southwestern United States, producing more than 2 inches (50 mm) of rain in southern California and
Arizona Arizona ( ; nv, Hoozdo Hahoodzo ; ood, Alĭ ṣonak ) is a state in the Southwestern United States. It is the 6th largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is part of the Fou ...
. One news agency attributed three deaths to the storm, though elsewhere there were no reports of damage.


Hurricane Georgette

A
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
was first observed in the eastern Pacific Ocean on August 4 in association with the
Intertropical Convergence Zone The Intertropical Convergence Zone (ITCZ ), known by sailors as the doldrums or the calms because of its monotonous windless weather, is the area where the northeast and the southeast trade winds converge. It encircles Earth near the thermal e ...
. It tracked westward, and by August 9 a low-level circulation formed well to the south of
Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...
. Banding features increased as the system detached from the Intertropical Convergence Zone, and on August 11, the system developed into Tropical Depression Eight-E about 730 miles (1170 km) southwest of
Acapulco Acapulco de Juárez (), commonly called Acapulco ( , also , nah, Acapolco), is a city and major seaport in the state of Guerrero on the Pacific Coast of Mexico, south of Mexico City. Acapulco is located on a deep, semicircular bay and has bee ...
. On becoming a tropical cyclone, the depression maintained an area of concentrated deep convection near the center. The
National Hurricane Center The National Hurricane Center (NHC) is the division of the United States' NOAA/National Weather Service responsible for tracking and predicting tropical weather systems between the Prime Meridian and the 140th meridian west poleward to the 3 ...
initially predicted that the depression would slowly intensify and reach winds of 70 mph (115 km/h) within 72 hours. For much of the rest of the storm's duration, the National Hurricane Center underestimated the intensity of the cyclone. The depression tracked steadily northwestward, caused by its location along the western periphery of a
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 ...
. It would retain that direction for most of its remaining duration. Late on August 11, it intensified into Tropical Storm Georgette, and two days later it attained hurricane status after developing a 40-mile (65 km)
eye Eyes are organs of the visual system. They provide living organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and conv ...
about 615 miles (990 km) south-southwest of
Cabo San Lucas Cabo San Lucas (, "Saint Luke Cape"), or simply just Cabo, is a resort city at the southern tip of the Baja California Peninsula, in the Mexican state of Baja California Sur. As at the 2020 Census, the population of the city was 202,694 inhabitan ...
. The eye became increasingly distinct while banding features became very well organized. Georgette attained peak winds of 115 mph (185 km/h) while centered 690 miles (1110 km) west-southwest of the southern tip of
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
. The hurricane soon moved over cooler water, and began to weaken as convection warmed and decreased. On August 16, it degenerated into a tropical storm, and Georgette dissipated on August 17 without ever affecting land.


Tropical Depression One-C

An area of convection developed in association with a northward bulge of the near-equatorial
convergence zone A convergence zone in meteorology is a region in the atmosphere where two prevailing flows meet and interact, usually resulting in distinctive weather conditions. This causes a mass accumulation that eventually leads to a vertical movement and ...
. It tracked west-northwestward under the influence of a
ridge A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The line ...
to its north, and organized into Tropical Depression One-C on August 19, about 1000 miles (1600 km) southeast of the
Hawaiian Islands The Hawaiian Islands ( haw, Nā Mokupuni o Hawai‘i) are an archipelago of eight major islands, several atolls, and numerous smaller islets in the North Pacific Ocean, extending some from the island of Hawaii in the south to northernmost Kur ...
. The depression failed to organize significantly as it turned westward. High
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 an upper-level
trough Trough may refer to: In science * Trough (geology), a long depression less steep than a trench * Trough (meteorology), an elongated region of low atmospheric pressure * Trough (physics), the lowest point on a wave * Trough level (medicine), the l ...
continually weakened the system, and on August 19, 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 ...
issued the final advisory on the tropical depression about 365 miles (585 km) south of
Hilo Hilo () is a census-designated place (CDP) and the largest settlement in Hawaii County, Hawaii, Hawaii County, Hawaii, United States, which encompasses the Hawaii (island), Island of Hawaii. The population was 44,186 according to the 2020 United ...
on the island of
Hawaii Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only stat ...
. It never affected land.


Hurricane Howard

A
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
moved off the coast of Africa on August 7. As it moved across the Atlantic Ocean, it failed to organize. On reaching the eastern Pacific Ocean on August 17, however, an area of
convection Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). When the cause of the convec ...
developed along the wave axis. Dvorak classifications began the next day, and a broad center of circulation gradually formed. Convection was intermittent at first, though it gradually organized and persisted near the center, and on August 20, the disturbance developed into Tropical Depression Nine-E about south of Puerto Angel, Mexico. It tracked generally west-northwestward, developing more pronounced banding features, and on August 21, the depression intensified into Tropical Storm Howard. The center of Howard became embedded within the deep convection, and the storm quickly strengthened to attain hurricane status late on the 21st. An
eye Eyes are organs of the visual system. They provide living organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and conv ...
developed as
outflow Outflow may refer to: *Capital outflow, the capital leaving a particular economy *Bipolar outflow, in astronomy, two continuous flows of gas from the poles of a star *Outflow (hydrology), the discharge of a lake or other reservoir system * Outflow ...
organized further, and Howard began to rapidly intensify to reach peak winds of 150 mph (240 km/h) about 600 miles (965 km) south-southeast of the southern tip of
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
. At the time of its peak intensity, the eye was small and located within a very cold
central dense overcast The central dense overcast, or CDO, of a tropical cyclone or strong subtropical cyclone is the large central area of thunderstorms surrounding its circulation center, caused by the formation of its eyewall. It can be round, angular, oval, or irr ...
. Shortly after peaking in intensity, the eye of Hurricane Howard gradually became larger, resulting in a slight weakening trend. After weakening to winds of 125 mph (200 km/h), the eye reached a diameter of about 30 miles (50 km), and the structure of the hurricane transitioned into that of an
annular hurricane An annular tropical cyclone is a tropical cyclone that features a normal to large, symmetric eye surrounded by a thick and uniform ring of intense convection, often having a relative lack of discrete rainbands, and bearing a symmetric appearance ...
, similar to that of Darby earlier in the season. Howard strengthened again into a
Category 4 hurricane Category, plural categories, may refer to: Philosophy and general uses *Categorization, categories in cognitive science, information science and generally *Category of being * ''Categories'' (Aristotle) *Category (Kant) *Categories (Peirce) *C ...
on August 25 before weakening slightly the following day. The hurricane retained annular characteristics for about 48 hours before moving over cooler water. On August 28, it weakened to a tropical storm, and early on August 30, Howard was considered to have
dissipated In thermodynamics, dissipation is the result of an irreversible process that takes place in homogeneous thermodynamic systems. In a dissipative process, energy (internal, bulk flow kinetic, or system potential) transforms from an initial form to a ...
. A small, low-level swirl of clouds devoid of convection persisted for a few days before dissipating. Howard never affected land.


Hurricane Isis

Isis developed on September 1 out of the interaction between a
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
and a large, low-level circulation to the southwest of
Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...
. It moved northward, striking the extreme southeastern portion of the Baja California Peninsula before attaining hurricane status in the
Gulf of California The Gulf of California ( es, Golfo de California), also known as the Sea of Cortés (''Mar de Cortés'') or Sea of Cortez, or less commonly as the Vermilion Sea (''Mar Bermejo''), is a marginal sea of the Pacific Ocean that separates the Baja Ca ...
. Isis made landfall at
Topolobampo Topolobampo () is a port on the Gulf of California in northwestern Sinaloa, Mexico. It is the fourth-largest town in the municipality of Ahome (after Los Mochis, Ahome, and Higuera de Zaragoza), reporting a 2010 census population of 6,361 inhabit ...
in the state of
Sinaloa Sinaloa (), officially the Estado Libre y Soberano de Sinaloa ( en, Free and Sovereign State of Sinaloa), is one of the 31 states which, along with Mexico City, comprise the Administrative divisions of Mexico, Federal Entities of Mexico. It is d ...
on September 3 and quickly lost its low-level circulation. The remnants persisted for several days before dissipating in the US state of
Idaho Idaho ( ) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyom ...
. In Mexico, Isis destroyed more than 700 houses and killed 14 people, primarily due to heavy rainfall of more than 20 inches (500 mm) in southern Baja California Sur. The rainfall caused widespread damage to roads and railways, stranding thousands of people. Moisture from the remnants of Isis extended into the southwestern United States, resulting in light rainfall, dozens of traffic accidents, and power outages for thousands of residents in
San Diego County San Diego County (), officially the County of San Diego, is a county in the southwestern corner of the U.S. state of California. As of the 2020 census, the population was 3,298,634, making it California's second-most populous county and the fi ...
.


Tropical Storm Javier

Javier is believed to have originated from a
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
that moved off the coast of Africa on August 22. A convective disturbance along the northern portion of the wave developed into Atlantic Hurricane Danielle on August 24, while the southern portion of the wave axis continued westward. The wave remained inactive and difficult to track as it crossed the Atlantic. On September 3, an area of convection began to develop near
Acapulco Acapulco de Juárez (), commonly called Acapulco ( , also , nah, Acapolco), is a city and major seaport in the state of Guerrero on the Pacific Coast of Mexico, south of Mexico City. Acapulco is located on a deep, semicircular bay and has bee ...
, at the same time and location where the wave would have been based on extrapolation. The disturbance became better defined on September 5 as it tracked west-northwestward, and on September 6 the convection became sufficiently organized and persistent for the
National Hurricane Center The National Hurricane Center (NHC) is the division of the United States' NOAA/National Weather Service responsible for tracking and predicting tropical weather systems between the Prime Meridian and the 140th meridian west poleward to the 3 ...
to classify it as Tropical Depression Eleven-E, while it was located about 200 miles (330 km) southwest of
Manzanillo, Mexico Manzanillo () is a city and seat of Manzanillo Municipality, in the Mexican state of Colima. The city, located on the Pacific Ocean, contains Mexico's busiest port, responsible for handling Pacific cargo for the Mexico City area. It is the large ...
. Easterly
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 ...
initially dislocated the circulation center to the eastern edge of the convection. 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 resulted in a general west-northwest motion, and the depression slowly intensified into Tropical Storm Javier late on September 7. Banding features in the system did not organize significantly, and on September 8, Javier attained a peak intensity of 60 mph (95 km/h), which coincided with a sharp increase in convection over the center. Steering currents soon weakened, and the storm turned to the east while convection quickly decreased. By September 9, the center was exposed from the diminishing deep convection, and that night it degenerated into a tropical depression. On September 11, the
National Hurricane Center The National Hurricane Center (NHC) is the division of the United States' NOAA/National Weather Service responsible for tracking and predicting tropical weather systems between the Prime Meridian and the 140th meridian west poleward to the 3 ...
issued its final advisory on Javier, though later analysis indicates that it remained a tropical cyclone as it turned southeastward. At times, it became difficult to distinguish Javier from the broader area of disturbed weather that persisted over the tropical eastern Pacific, though a brief increase in convection and a ship report of winds exceeding 40 mph (65 km/h) indicate that Javier strengthened again into a tropical storm late on September 12. It turned to the northeast, and reached winds of 50 mph (80 km/h) before weakening due to waning convection. Javier made
landfall Landfall is the event of a storm moving over land after being over water. More broadly, and in relation to human travel, it refers to 'the first land that is reached or seen at the end of a journey across the sea or through the air, or the fact ...
about 35 miles (55 km) east-southeast of
Cabo Corrientes, Jalisco Cabo Corrientes is a cape on the Pacific coast of the Mexican state of Jalisco. It marks the southernmost point of the Bahía de Banderas (Bay of Flags), upon which the port and resort city of Puerto Vallarta stands. The municipality in which ...
early on September 14, and dissipated within 12 hours of moving ashore. The National Hurricane Center advised small craft along coastal areas of Mexico to monitor the progress of the storm. Javier produced moderate rainfall along coastal regions of Mexico, including a 24-hour peak of 7.36 inches (187 mm) in
Colima Colima (), officially the Free and Sovereign State of Colima ( es, Estado Libre y Soberano de Colima), is one of the 31 states that make up the Political divisions of Mexico, 32 Federal Entities of Mexico. It shares its name with its capital and ...
, 6.69 inches (170 mm) in
Michoacán Michoacán, formally Michoacán de Ocampo (; Purépecha: ), officially the Free and Sovereign State of Michoacán de Ocampo ( es, Estado Libre y Soberano de Michoacán de Ocampo), is one of the 32 states which comprise the Federal Entities of ...
, and 3.34 inches (85 mm) in
Jalisco Jalisco (, , ; Nahuatl: Xalixco), officially the Free and Sovereign State of Jalisco ( es, Estado Libre y Soberano de Jalisco ; Nahuatl: Tlahtohcayotl Xalixco), is one of the 31 states which, along with Mexico City, comprise the 32 Federal En ...
. Puerto Vallarta reported the highest total rainfall, at 17.33 inches (440 mm). Damage, if any, is unknown.


Tropical Depression Twelve-E

A tropical disturbance developed persistent convection in association with a low-level circulation, and organized into Tropical Depression Twelve-E late on October 1 about 350 miles (565 km) west-northwest of
Manzanillo, Mexico Manzanillo () is a city and seat of Manzanillo Municipality, in the Mexican state of Colima. The city, located on the Pacific Ocean, contains Mexico's busiest port, responsible for handling Pacific cargo for the Mexico City area. It is the large ...
. Within an environment of weak steering currents, the depression was initially forecast to track slowly west-northwestward and reach winds of 60 mph (95 km/h), but instead it drifted eastward before turning slowly to the west. The depression failed to organize and gradually worsened in appearance. Early on October 2, two ships reported southwest winds much further to the north, with the
National Hurricane Center The National Hurricane Center (NHC) is the division of the United States' NOAA/National Weather Service responsible for tracking and predicting tropical weather systems between the Prime Meridian and the 140th meridian west poleward to the 3 ...
indicating that either the center was exceedingly small, that no center existed at the time, or that the center was located far to the north of the thunderstorm activity. Operationally, the center was relocated further to the north, then relocated about to the south six hours later based on visible satellite images, then again relocated to the north, coinciding with officials issuing the last advisory on the system. By early October 3, the depression possessed only intermittent convection, and later that day it dissipated to the southwest of the Baja California peninsula. Heavy rains from its eastern periphery fell across southwest Mexico, with a maximum total of at Las Gaviotas/Compostela.


Hurricane Kay

A small, low-level circulation separated itself from the
Intertropical Convergence Zone The Intertropical Convergence Zone (ITCZ ), known by sailors as the doldrums or the calms because of its monotonous windless weather, is the area where the northeast and the southeast trade winds converge. It encircles Earth near the thermal e ...
on October 10, several hundred miles southwest of
Baja California Baja California (; 'Lower California'), officially the Free and Sovereign State of Baja California ( es, Estado Libre y Soberano de Baja California), is a state in Mexico. It is the northernmost and westernmost of the 32 federal entities of Mex ...
. The circulation was well defined, though its convection was initially minimal and disorganized. On October 12, the convection increased greatly, and the system was sufficiently organized to be classified Tropical Depression Thirteen-E early on October 13, about 715 miles (1150 km) southwest of
Cabo San Lucas Cabo San Lucas (, "Saint Luke Cape"), or simply just Cabo, is a resort city at the southern tip of the Baja California Peninsula, in the Mexican state of Baja California Sur. As at the 2020 Census, the population of the city was 202,694 inhabitan ...
. Dvorak classifications also indicated winds of about 35 mph (55 km/h). Operationally, the depression was forecast to intensify to reach peak winds of 45 mph (70 km/h) while tracking steadily west-northwestward. The storm center was at first ill-defined, and post-season analysis estimates that it intensified into Tropical Storm Kay about 6 hours after developing. After becoming a tropical storm, Kay rapidly organized as it tracked generally westward. A pinhole
eye Eyes are organs of the visual system. They provide living organisms with vision, the ability to receive and process visual detail, as well as enabling several photo response functions that are independent of vision. Eyes detect light and conv ...
developed in the center of the convection, and Kay attained hurricane status late on October 13, about 18 hours after developing. After remaining a hurricane for about 12 hours, the eye disappeared and the convection weakened, and early on October 14 Kay degenerated into a tropical storm. Within an environment of weak steering currents, the storm turned to the southwest, then to the south, after weakening to a tropical depression on October 15. Convection sporadically redeveloped, but failed to persist. Kay turned to the southeast and later to the east, and the system dissipated on October 17, about 330 miles (530 km) south-southwest of its origin. Kay never affected land.


Hurricane Lester

A
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
moved off the coast of Africa on September 29, and on October 5, an area of convection along the wave developed into Atlantic Hurricane Lisa. The wave axis continued westward, and after crossing Central America convection increased as it tracked northwestward, and the system organized into Tropical Depression Fourteen-E on October 15, about 200 miles (320 km) south of Guatemala. It moved northwestward and late on the 15th it intensified into Tropical Storm Lester, about 115 miles (185 km/h) south of the border of
Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...
and Guatemala, before attaining hurricane status on October 16. Lester continued westward and strengthened to reach a peak intensity of 115 mph (185 km/h) on October 22. Late on October 23, it degenerated into a tropical storm, and several days later, Lester dissipated on October 26. Early in its lifetime, Lester produced heavy rainfall across southwestern
Guatemala Guatemala ( ; ), officially the Republic of Guatemala ( es, República de Guatemala, links=no), is a country in Central America. It is bordered to the north and west by Mexico; to the northeast by Belize and the Caribbean; to the east by H ...
. The rainfall destroyed some houses and killed livestock, and a mudslide from the heavy precipitation killed two children. In
Honduras Honduras, officially the Republic of Honduras, is a country in Central America. The republic of Honduras is bordered to the west by Guatemala, to the southwest by El Salvador, to the southeast by Nicaragua, to the south by the Pacific Oce ...
, rainfall from the hurricane destroyed a bridge in
Tegucigalpa Tegucigalpa (, , ), formally Tegucigalpa, Municipality of the Central District ( es, Tegucigalpa, Municipio del Distrito Central or ''Tegucigalpa, M.D.C.''), and colloquially referred to as ''Tegus'' or ''Teguz'', is the capital and largest city ...
, affecting about 1,000 people. Moisture brought around the northeast periphery of the
Sierra Madre Occidental The Sierra Madre Occidental is a major mountain range system of the North American Cordillera, that runs northwest–southeast through northwestern and western Mexico, and along the Gulf of California. The Sierra Madre is part of the American C ...
led to a narrow band of heavy rainfall along the upslope side of the mountain range, with a local precipitation maximum exceeding 14 inches (360 mm). Though no surface reports are available, it is estimated that tropical-storm-force winds occurred along coastal areas of southern Mexico.


Hurricane Madeline

A
tropical wave A tropical wave (also called easterly wave, tropical easterly wave, and African easterly wave), in and around the Atlantic Ocean, is a type of atmospheric trough, an elongated area of relatively low air pressure, oriented north to south, which ...
moved off the coast of Africa on September 25, and remained disorganized while crossing the Atlantic Ocean before crossing Central America into the Pacific Ocean. It continued westward, and on October 15 began to steadily organize until developing into Tropical Depression Fifteen-E on October 16, about 230 miles (370 km) west-southwest of Manzanillo, Mexico. At the western end of a mid-level
ridge A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The line ...
, the depression tracked north-northwestward. 12 hours after first developing, the depression intensified into Tropical Storm Madeline. Banding features gradually improved in organization, and late on October 17, Madeline attained hurricane status. On October 18, Madeline attained peak winds of 85 mph (140 km/h) about 95 miles (150 km) southwest of
San Blas, Nayarit San Blas is both a municipality and municipal seat located on the Pacific coast of Mexico in Nayarit. City San Blas is a port and popular tourist destination, located about north of Puerto Vallarta, and west of the state capital Tepic, and th ...
. Late on October 19, the hurricane degenerated into a tropical storm, and early on October 20, Madeline dissipated in the southern portion of the
Gulf of California The Gulf of California ( es, Golfo de California), also known as the Sea of Cortés (''Mar de Cortés'') or Sea of Cortez, or less commonly as the Vermilion Sea (''Mar Bermejo''), is a marginal sea of the Pacific Ocean that separates the Baja Ca ...
. Some of the rainbands from Madeline moved over portions of southwest Mexico, with close to 9 inches (560 mm) falling at Cabo Corrientes. No damage or casualties were reported as a result of the storm in Mexico. Moisture from Madeline contributed to heavy rainfall across southeastern Texas, reaching over 22 inches (560 mm) in some locations. Thirty-one people died due to the flooding, and damage totaled $750 million (1998 USD).


Storm names

The following names were used to name storms that formed in the northeastern Pacific Ocean during 1998. No retired names were announced by the
World Meteorological Organization The World Meteorological Organization (WMO) is a specialized agency of the United Nations responsible for promoting international cooperation on atmospheric science, climatology, hydrology and geophysics. The WMO originated from the Internati ...
in the spring of 1999, so they were used again in the 2004 season. This is the same list used in the
1992 season Year 199 ( CXCIX) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was sometimes known as year 952 ''Ab urbe condita''. The denomination 199 for this year has been used since the ...
. For storms that form in 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 ...
's area of responsibility, encompassing the area between 140 degrees west and 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 ...
, all names are used in a series of four rotating lists. The next four names that were slated for use in 1998 are shown below, however none of them were used.


Season effects

This is a table of all the tropical cyclones that formed in the 1998 Pacific hurricane season. It includes their duration, names, intensities, areas affected, 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 the damage figures are in 1998 USD.


See also

*
1998 Atlantic hurricane season The 1998 Atlantic hurricane season was one of the most disastrous Atlantic hurricane seasons on record, featuring the highest number of storm-related fatalities in over 218 years and one of the costliest ever at the time. The season had above a ...
* 1998 North Indian Ocean cyclone season *
1998 Pacific typhoon season The 1998 Pacific typhoon season was at the time the least active Pacific typhoon season on record, until the record was surpassed 12 years later, spawning 16 tropical storms and 8 typhoons. The scope of this article is limited to the Pacific Oc ...
* Australian region cyclone seasons: 1997–98, 1998–99 * South Pacific cyclone seasons: 1997–98, 1998–99 * South-West Indian Ocean cyclone seasons: 1997–98, 1998–99 *
List of Pacific hurricanes This is a list of notable Pacific hurricanes, subdivided by reason for notability. Notability means that it has met some criterion or achieved some statistic, or is part of a top ten for some superlative. It includes lists and rankings of Pacific ...
*
Pacific hurricane season A Pacific hurricane is a mature tropical cyclone that develops within the northeastern and central Pacific Ocean to the east of 180°W, north of the equator. For tropical cyclone warning purposes, the northern Pacific is divided into three regio ...


References


External links


NHC 1998 Pacific hurricane season archive



Central Pacific Hurricane Center archive
{{DEFAULTSORT:1998 Pacific Hurricane Season Pacific hurricane seasons