Cyclone Seroja
   HOME

TheInfoList



OR:

Severe Tropical Cyclone Seroja was a deadly
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. Depen ...
that brought historic flooding and landslides to portions of southern
Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
and
East Timor East Timor (), also known as Timor-Leste (), officially the Democratic Republic of Timor-Leste, is an island country in Southeast Asia. It comprises the eastern half of the island of Timor, the exclave of Oecusse on the island's north-west ...
and later went on to make landfall in
Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...
's
Mid West The Midwestern United States, also referred to as the Midwest or the American Midwest, is one of four Census Bureau Region, census regions of the United States Census Bureau (also known as "Region 2"). It occupies the northern central part of ...
region, becoming the first to do so since Cyclone Elaine in 1999. The twenty-second tropical low, seventh tropical cyclone, and third severe tropical cyclone of the
2020–21 Australian region cyclone season The 2020–21 Australian region cyclone season was a below average but very deadly season when most tropical cyclones formed in the Southern Indian Ocean and Pacific Oceans between 90°E and 160°E. It produced 8 tropical cyclones with 3 stren ...
, the precursor of Seroja formed off the south coast of
Timor island Timor is an island at the southern end of Maritime Southeast Asia, in the north of the Timor Sea. The island is divided between the sovereign states of East Timor on the eastern part and Indonesia on the western part. The Indonesian part, also ...
as Tropical Low 22U at 18:00 UTC on 3 April 2021. The tropical low moved very slowly near the island, while the system's
thunderstorm A thunderstorm, also known as an electrical storm or a lightning storm, is a storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere, known as thunder. Relatively weak thunderstorms are some ...
s increased in organization. The low intensified into Tropical Cyclone Seroja by 4 April, while it was passing north of
Rote Island Rote Island ( id, Pulau Rote, also spelled ''Roti'') is an island of Indonesia, part of the East Nusa Tenggara province of the Lesser Sunda Islands. According to legend, this island got its name accidentally when a lost Portuguese sailor arrive ...
, while continuing its slow strengthening trend. Due to the presence of Tropical Cyclone Odette in Seroja's vicinity, interaction was anticipated as the storm moved away from Indonesia and East Timor. Its intensity fluctuated as it moved southwest, with its strengthening being highly hindered due to interaction with Odette. This caused the system to weaken as Seroja moved closer to it, due to a phenomenon known as the
Fujiwhara effect 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 ...
. Eventually, Seroja began to restrengthen and weaken Odette, with Seroja absorbing Odette into its circulation on 10 April. Due to Odette, Seroja was steered to the southeast towards Australia, before strengthening even further. At around 8 p.m. local time on 11 April, Seroja made landfall on the western coastline of Western Australia as a Category 3 severe tropical cyclone, slightly south of the coastal town of Kalbarri, bringing heavy rain and
hurricane-force The Beaufort scale is an empirical measure that relates wind speed to observed conditions at sea or on land. Its full name is the Beaufort wind force scale. History The scale was devised in 1805 by the Irish hydrographer Francis Beaufo ...
wind gusts (about 170 km/h, or 110 mph). Later that day, Seroja began accelerating southeastward while weakening. On 12 April, Seroja emerged off the southern coast of Western Australia while beginning to undergo an
extratropical transition 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 ...
, before being absorbed into another larger extratropical cyclone to the south. The name ''Seroja'' means lotus in Indonesian. As of May 2021, it is estimated that at least 272 people were killed by the storm, with 183 people in
Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
, 42 in
East Timor East Timor (), also known as Timor-Leste (), officially the Democratic Republic of Timor-Leste, is an island country in Southeast Asia. It comprises the eastern half of the island of Timor, the exclave of Oecusse on the island's north-west ...
, and one in Australia. At least 72 people from Indonesia and 30 from East Timor are still missing. The cyclone damaged or destroyed more than 20,000 houses and five bridges in Indonesia's
East Nusa Tenggara East Nusa Tenggara ( id, Nusa Tenggara Timur – NTT; pt, Sonda Oriental) is the southernmost province of Indonesia. It comprises the eastern portion of the Lesser Sunda Islands, facing the Indian Ocean in the south and the Flores Sea in the nor ...
province while more than 12,000 people were evacuated to government-owned shelters. Around 9,000 people were displaced on East Timor, while at least 10,000 homes have been submerged. Damage reports from Kalbarri, Western Australia started coming in soon after the storm 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 ...
. The storm is estimated to have caused over $490.7 million (2021
USD The United States dollar (symbol: $; code: USD; also abbreviated US$ or U.S. Dollar, to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official ...
) in damages, a majority across
Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
. The damage caused by Cyclone Seroja in Indonesia was described as catastrophic. Efforts to relieve the devastating effects of the cyclone came a short time after Seroja left Indonesia. They included almost a million USD in donations, methods to help fight COVID-19, evacuations, local governments sending aid to their respective areas, and more. East Timor also was given outside assistance from other organizations and nations. The Indonesian government's response was criticized due to the slow nature of the response, resulting in some high-ranking officials being fired.


Meteorological history

On 29 March, the BoM began to mention that Tropical Low 22U was developing to the south of
Timor Timor is an island at the southern end of Maritime Southeast Asia, in the north of the Timor Sea. The island is divided between the sovereign states of East Timor on the eastern part and Indonesia on the western part. The Indonesian part, also ...
. By 3 April, the tropical low fully developed as it was within an active trough. The low was located in a generally favorable environment with deep moisture, low 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 horizont ...
, and defined outflow. The low drifted close to the coast of Timor very slowly with persistent spiraling bands 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 conve ...
occupying the storm's circulation, producing prolific rainfall in the surrounding regions on 3–4 April. At this time, the low pressure system was located inside the Area of Responsibility (AoR) of
TCWC Jakarta Meteorology, Climatology, and Geophysical Agency ( id, Badan Meteorologi, Klimatologi, dan Geofisika, abbreviated BMKG) is an Indonesian non-departmental government agency for meteorology, climatology, and geophysics. History Its history began ...
. By the early morning of 4 April, the presentation of its structure had improved with spiral bands of deep convection and tight curvature at its center. Although there were fluctuations in central convection, a favorable environment of deep moisture, low vertical wind shear, and good outflow meant further development of the system was expected. Meanwhile, the Joint Typhoon Warning Center (JTWC) issued their first warning on the storm as ''Tropical Cyclone 26S'' at 15:00 on UTC 4 April''.'' The tropical low slowly gained strength, intensifying to a Category 1 tropical cyclone, and was given the name ''Seroja'' by the Tropical Cyclone Warning Centre (TCWC) Jakarta at 20:00 UTC on 4 April, about 95 km (60 mi) north-northwest of
Rote Island Rote Island ( id, Pulau Rote, also spelled ''Roti'') is an island of Indonesia, part of the East Nusa Tenggara province of the Lesser Sunda Islands. According to legend, this island got its name accidentally when a lost Portuguese sailor arrive ...
. During 5 April, Seroja continued to move at in a west-southwest direction, away from the Indonesian coastline. The storm intensified to a Category 2 tropical cyclone at 19:00 UTC, with 10-minute sustained winds of and its central pressure deepening to . Long term uncertainty in both track and intensity persisted in the forecasting of Seroja's track, due to interaction with Tropical Low 23U, to the far west of the storm. Seroja held this strength for roughly 12 hours, before unexpectedly weakening to a Category 1 tropical cyclone yet again on 6 April, due to southeasterly
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 horizont ...
, and dry air partially exposing the low level circulation (LLC) and degrading its thunderstorm activity. Seroja fluctuated in strength for several hours, intensifying slightly on 7 April, as it continued in a generally southwesterly direction. Seroja became disorganized on satellite imagery as convection became dislocated to the south on 8 April, while it began to closely interact with Tropical Cyclone Odette (formerly Tropical Low 23U) just to the northwest, as a result of the
Fujiwhara effect 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 ...
, complicating the forecasts for the tropical cyclone and causing it to weaken again. Seroja resumed intensification by the next day, re-intensifying into a Category 2 tropical cyclone at 13:16 UTC on 9 April, as the storm began to absorb Odette and as wind shear started to ease off. By 10 April, Seroja had absorbed most of Odette's remaining thunderstorms and began to accelerate to the southeast towards
Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...
, maintaining a relatively organized structure. Later that day, Seroja fully absorbed Odette into its circulation. Seroja continued to steadily intensify as it approached the Gascoyne Region; the JTWC upgraded Seroja to a Category 1–equivalent tropical cyclone on the
Saffir–Simpson scale The Saffir–Simpson hurricane wind scale (SSHWS) classifies hurricanes—which in the Western Hemisphere are tropical cyclones that exceed the intensities of tropical depressions and tropical storms—into five categories distinguished b ...
, with sustained winds of 120 km/h (75 mph), at 18:00 UTC on 10 April. By early on 11 April, Seroja had intensified into a Category 3 severe tropical cyclone, the third severe tropical cyclone of the season, as a ragged eye began to emerge from the cyclone's
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 ...
. Seroja continued rapidly accelerating to the southeast at 53 km/h (32 mph), with its eye becoming more defined on infrared and
Doppler weather radar Weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, and estimate its type (rain, snow, hail etc.). Modern weather radars are mostly pulse- ...
images before making
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 ...
near Gregory,
Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...
, or just north of
Geraldton Geraldton ( Wajarri: ''Jambinu'', Wilunyu: ''Jambinbirri'') is a coastal city in the Mid West region of the Australian state of Western Australia, north of the state capital, Perth. At June 2018, Geraldton had an urban population of 37,648. ...
at peak strength with 1-minute sustained winds of 130 km/h (80 mph), 10-minute sustained winds of 120 km/h (75 mph), and a minimum central pressure of 971 hPa (28.76 inHg), with observations of gusts as high as 150 km/h (90 mph). Following landfall, Seroja quickly moved to the southeast over Australia, while gradually weakening. Early on 12 April, Seroja's extratropical remnant entered the
Great Australian Bight The Great Australian Bight is a large oceanic bight, or open bay, off the central and western portions of the southern coastline of mainland Australia. Extent Two definitions of the extent are in use – one used by the International Hydrog ...
, while beginning to transition into an extratropical cyclone, before being absorbed into a larger extratropical cyclone to the south later that day.


Preparations


Indonesia

The Indonesian
Meteorology, Climatology, and Geophysical Agency Meteorology, Climatology, and Geophysical Agency ( id, Badan Meteorologi, Klimatologi, dan Geofisika, abbreviated BMKG) is an Indonesian non-departmental government agency for meteorology, climatology, and geophysics. History Its history began ...
declared two days before the cyclone's formation that they were already anticipating the possibility of tropical cyclone development over the
Savu Sea The Savu Sea (or the Sawu Sea) ( id, Laut Sawu, pt, Mar de Savu, tet, Tasi Savu) is a small sea within Indonesia named for the island of Savu (Sawu) on its southern boundary. It is bounded by Savu and Rai Jua to the south, the islands of ...
. On 4 April 2021, the agency issued an early warning. On 8 April 2021, the agency again issued warnings to other provinces such as Bali,
East Java East Java ( id, Jawa Timur) is a Provinces of Indonesia, province of Indonesia located in the easternmost hemisphere of Java island. It has a land border only with the province of Central Java to the west; the Java Sea and the Indian Ocean bord ...
, Central Java, and
West Nusa Tenggara West Nusa Tenggara ( id, Nusa Tenggara Barat – NTB) is a province of Indonesia. It comprises the western portion of the Lesser Sunda Islands, with the exception of Bali which is its own province. Mataram, on Lombok, is the capital and largest ...
.


Australia

The
Australian Bureau of Meteorology Australian(s) may refer to: Australia * Australia, a country * Australians, citizens of the Commonwealth of Australia ** European Australians ** Anglo-Celtic Australians, Australians descended principally from British colonists ** Aboriginal Au ...
(BOM) warned on 5 April 2021 that Seroja could approach the West
Pilbara The Pilbara () is a large, dry, thinly populated region in the north of Western Australia. It is known for its Aboriginal peoples; its ancient landscapes; the red earth; and its vast mineral deposits, in particular iron ore. It is also a g ...
or
Gascoyne The Gascoyne region is one of the nine administrative regions of Western Australia. It is located in the northwest of Western Australia, and consists of the local government areas of Carnarvon, Exmouth, Shark Bay and Upper Gascoyne. The Gasc ...
coastline. It was also advised that tourists be ready to change plans, in case the cyclone impacts the area and brings unsafe conditions to go home. Due to the cyclone's uncertain track from its
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 ...
with Tropical Cyclone Odette, the chance of impacts on Western Australia was uncertain as to where it would go; out to sea or into land. As the storm approached Australia, the price of Australian commodities such as coals and iron ores were expected to rise. In addition, there was concern that it would disrupt or delay shipments and trades from the region. The BOM also issued a tropical cyclone watch early on 9 April for much of the region between Coral Bay and Lancelin.
Department of Fire and Emergency Services The Department of Fire and Emergency Services (DFES) is a government department that is responsible for fire and emergency services in Western Australia. The department came into being in 2012 as a result of the Perth Hills Bush Fire review.DFES ...
(DFES) Acting Commissioner Craig Waters advised all people in the watch area to 'leave immediately' as many of the homes in the area would be under significant risk with pre-saturated soil allowing flooding to likely occur much more easily. BOM also mentioned that this region was not accustomed to tropical cyclone impacts, making the risk of Seroja's impacts more dangerous than usual with a month's worth of rain expected to fall within a day. A tropical cyclone warning was then issued for Cape Cuvier to Geraldton on 10 April as Seroja neared, albeit strengthening slower than anticipated. All people between Coral Bay and
Geraldton Geraldton ( Wajarri: ''Jambinu'', Wilunyu: ''Jambinbirri'') is a coastal city in the Mid West region of the Australian state of Western Australia, north of the state capital, Perth. At June 2018, Geraldton had an urban population of 37,648. ...
were eventually told to evacuate immediately on 11 April as homes were not built to withstand such high winds. Premier
Mark McGowan Mark McGowan (born 13 July 1967) is an Australian politician, the 30th premier of Western Australia, and the leader of the Western Australian branch of the Labor Party. McGowan was born and raised in Newcastle, New South Wales. He attended t ...
said that Seroja was "like nothing we have seen before in decades". There was a Red Alert placed along an 800 kilometer stretch of coastline south of Carnarvon and Lancelin. The people under the alert were required to stay in their houses or in an evacuation center. The latter structures were open in Port Denison, Carnarvon and Denham. The cyclone was expected to impact the area until midnight. High tides, intense rainfall, flash flooding, dangerous surf and beach erosion were among the warned dangers of Seroja.


Impact


East Timor

In
East Timor East Timor (), also known as Timor-Leste (), officially the Democratic Republic of Timor-Leste, is an island country in Southeast Asia. It comprises the eastern half of the island of Timor, the exclave of Oecusse on the island's north-west ...
, a landslide and floods displaced more than 8,000 people and was initially claimed to have led to the deaths of 42 people in total. The storm caused power outages in the entirety of
East Timor East Timor (), also known as Timor-Leste (), officially the Democratic Republic of Timor-Leste, is an island country in Southeast Asia. It comprises the eastern half of the island of Timor, the exclave of Oecusse on the island's north-west ...
, in addition to damaging the presidential palace. Flood caused by the storm damaged the national laboratory of Guido Valadares National Hospital, the only laboratorium in the country, causing concern that it would affect East Timor's effort to mitigate the
COVID-19 pandemic The COVID-19 pandemic, also known as the coronavirus pandemic, is an ongoing global pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The novel virus was first identi ...
. The floods also seemed to have damaged the country's central pharmacy, where vaccine stocks for East Timor population were stored. Other damaged facilities include two COVID-19 isolation facilities. It is thought that many more people in East Timor have died due to the storm's widespread flooding. At least 30 people remain missing in the country. Preliminary reports from 7 April 2021 showed that approximately 10,325 people were affected by the storm. 76% of those people were in the Dili municipality. The rains were so heavy that the capital was referred to as a "mud pit". Damage from Seroja in East Timor was expected to exceed US$100 million, according to Prime Minister
Taur Matan Ruak José Maria Vasconcelos (born 10 October 1956), popularly known as Taur Matan Ruak (Tetum for "Two Sharp Eyes"), is an East Timorese politician who has served as the prime minister of East Timor since 22 June 2018. He was also President of E ...
. According to a report published in January 2022 by the
United Nations Office for Disaster Risk Reduction The United Nations Office for Disaster Risk Reduction (UNDRR) was created in December 1999 to ensure the implementation of the International Strategy for Disaster Reduction (General Assembly (GA) resolution 54/219).
(UNDRR), the flooding in East Timor affected 13 municipalities and 30,322 households, destroyed 4,212 houses, took 34 lives, and was "... said to be the worst the country has seen in 50 years ...". The East Timor country coordinator for the Australian Humanitarian Partnership consortium said that it was "anything but typical". The country manager of
Australian People for Health, Education and Development Abroad Australian People for Health, Education and Development Abroad (APHEDA), also known as Union Aid Abroad, is a non-government organisation of the Australian union movement. The non-government organisation was established in 1984 as the internatio ...
(APHEDA) attributed it to the obstruction of waterways by housing erected along them. She said that such housing blocks water canals, and that the government needed to enforce the country's pre-independence rule against building within of bodies of water.


Indonesia

As a tropical low, Seroja caused widespread rainfall and thunderstorms in the West Nusa Tenggara and
East Nusa Tenggara East Nusa Tenggara ( id, Nusa Tenggara Timur – NTT; pt, Sonda Oriental) is the southernmost province of Indonesia. It comprises the eastern portion of the Lesser Sunda Islands, facing the Indian Ocean in the south and the Flores Sea in the nor ...
provinces in
Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
. In the early hours of 4 April, floods struck the island, hours before people intended to gather for
Easter Easter,Traditional names for the feast in English are "Easter Day", as in the '' Book of Common Prayer''; "Easter Sunday", used by James Ussher''The Whole Works of the Most Rev. James Ussher, Volume 4'') and Samuel Pepys''The Diary of Samuel ...
celebrations. In the immediate aftermath, 41 people were killed and 28 were seriously injured. Bridges and roads connecting to Flores Island and Adonara Island were destroyed. The banks of two rivers in Ende district burst, killing two people and resulting in extensive flooding in East Flores. Dozens of homes were buried under mudslides in the village of Lamenele on
Adonara Adonara is an island in the Lesser Sunda Islands of Indonesia, located east of the larger island of Flores in the Solor Archipelago. To the east lies Lembata, formerly known as Lomblen. Adonara is the highest of the islands of the archipelago, re ...
island. In the East Flores Regency, fourteen villages were hit by flash flooding as a result of runoff of volcanic materials from Mount Ile Lewotolok. A local chief of a village in East Flores reported that hundreds of hectares of crops were destroyed. Dozens of farm animals were also reportedly swept away by flash floods. A majority of the casualties in East Flores were from the Nelelamadike village in Adonara Island after a massive rockslide struck the village. The village reported 55 deaths, of whom 15 were children. More than 600 residents of the village were left homeless by the cyclone. In the city of
Kupang Kupang ( id, Kota Kupang, ), formerly known as Koepang, is the capital of the Indonesian province of East Nusa Tenggara. At the 2020 C ensus, it had a population of 442,758; the official estimate as at mid 2021 was 455,850. It is the largest ci ...
, 734 houses were damaged, affecting 2,190 people, while in Rote Ndao, around 30 houses were flooded. A bridge connecting the cities of Kupang and Malaka Regency was destroyed, making travel between the two regions extremely difficult. A passenger ship, the ''Jatra I'', sunk on a port in Kupang city, after experiencing a leak. No casualties were reported from the sinking. Another ship, the ''Namparnos'', went adrift and grounded on Kambing Island. Trans-Timor roads were flooded, cutting off access between regencies. The office building of the governor of East Nusa Tenggara, commonly known as "Sasando Building," was also damaged by the cyclone. In East Nusa Tenggara and West Nusa Tenggara, approximately 11,406 people were displaced, while 66,036 homes were damaged. Five cities and regencies experienced power outages, but electricity was partially restored later. At least 98
base transceiver station A base transceiver station (BTS) is a piece of equipment that facilitates wireless communication between user equipment (UE) and a network. UEs are devices like mobile phones (handsets), WLL phones, computers with wireless Internet connectivity, ...
s in East Nusa Tenggara province were damaged, although some were restored later by the Ministry of Communication and Information Technology. Four fuel trucks owned by Pertamina were damaged. A
dam A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use ...
in East Sumba overflowed, causing a flood in a neighboring city. The cyclone affected areas as far as the city of
Bima Bima (Indonesia: ''Kota Bima'') is a city on the eastern coast of the island of Sumbawa in central Indonesia's province West Nusa Tenggara. It is the largest city on the island of Sumbawa, with a population of 142,443 at the 2010 census and 155,1 ...
in West Nusa Tenggara, where it caused floods, submerging 10,000 homes and affecting more than 27,000 people. On Lembata, the rain loosened solidified lava from an eruption in November of Ili Lewotolok volcano. The stone tumbled into several villages, killing at least 11 people. A garden which had belonged to several residents of Sikumana Village in
Kupang Kupang ( id, Kota Kupang, ), formerly known as Koepang, is the capital of the Indonesian province of East Nusa Tenggara. At the 2020 C ensus, it had a population of 442,758; the official estimate as at mid 2021 was 455,850. It is the largest ci ...
was severely flooded and turned into a two-
hectare The hectare (; SI symbol: ha) is a non-SI metric unit of area equal to a square with 100- metre sides (1 hm2), or 10,000 m2, and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is ...
wide karst lake, after the composition of limestone and karst rock was eroded. The karst lake was given the name "Tuaknatun Lake" by local residents due to the presence of teak trees nearby. There were fears of a looming food crisis across East Nusa Tenggara as there were multiple reports of extensive damage on crops and stored food from harvests. Hundreds of livestock were reported as dead due to the flooding. Residents reported that more than 10,000 hectares of crops had been destroyed by the flood. In Malaka Regency, more than 4,000 hectares of crops were destroyed. This was worsened by the collapse of a spillway in the nearby Benanain Dam in the regency, which also serves as the main source of water for locals. The regency was one of the main food producer in East Nusa Tenggara. The extensive damage on crops and livestock in the regency may further worsen the crisis in the region. As of 14 April, the death toll in the country had risen to 183. The high death toll was most likely because most people were sleeping when the cyclone made landfall, meaning that it was unexpected. In total, as much as 29 regencies and city across East Nusa Tenggara were affected by the cyclone. More than 70,000 structures across the region were damaged or destroyed and nearly half a million people were affected. Farmers in the seaweed industry in Kupang Regency lost an estimated 7 billion
rupiah The rupiah (symbol: Rp; currency code: IDR) is the official currency of Indonesia. It is issued and controlled by Bank Indonesia. The name " rupiah" is derived from the Sanskrit word for silver, (). Sometimes, Indonesians also informally use ...
(US$482,101) due to crop failure and destruction of cultivation facilities/infrastructure attributed to Seroja. Total preliminary estimated losses in
East Nusa Tenggara East Nusa Tenggara ( id, Nusa Tenggara Timur – NTT; pt, Sonda Oriental) is the southernmost province of Indonesia. It comprises the eastern portion of the Lesser Sunda Islands, facing the Indian Ocean in the south and the Flores Sea in the nor ...
, according to the
Indonesian National Board for Disaster Management The National Agency for Disaster Countermeasure (Indonesian: ''Badan Nasional Penanggulangan Bencana''; officially National Disaster Management Agency), abbreviated as BNPB, is the Indonesian board for natural disaster affairs. It was establishe ...
, amounted to at least 3.4 trillion
rupiah The rupiah (symbol: Rp; currency code: IDR) is the official currency of Indonesia. It is issued and controlled by Bank Indonesia. The name " rupiah" is derived from the Sanskrit word for silver, (). Sometimes, Indonesians also informally use ...
(US$235.7 million) as of May 2021.


Australia

After Seroja made landfall, around 4,350 people in Western Australia lost electricity as the storm's high winds downed power lines, particularly around Kalbarri. A wind gust of , which was likely being one of the strongest wind gusts recorded in the city in more than 50 years. Rain up to was also reported in the town. This number of power outages soon increased to over 25,000 within hours of landfall as Seroja accelerated further inland. Shortly after, unconfirmed reports claimed that buildings had already had their roofs torn off and even entire homes and sheds were completely destroyed. Carnarvon's famous 124-year old "One Mile
Jetty A jetty is a structure that projects from land out into water. A jetty may serve as a breakwater, as a walkway, or both; or, in pairs, as a means of constricting a channel. The term derives from the French word ', "thrown", signifying some ...
" collapsed and floated out to sea. Some residents were required to barricade themselves within bathrooms or cupboards as their homes were damaged. In the daytime,
Department of Fire and Emergency Services The Department of Fire and Emergency Services (DFES) is a government department that is responsible for fire and emergency services in Western Australia. The department came into being in 2012 as a result of the Perth Hills Bush Fire review.DFES ...
(DFES) reported that around 70% of structures in Kalbarri were damaged, while around 40% of those properties had been completely destroyed. The department also received around 175 calls by the morning of 12 April. Businesses based around the tourist industry in Kalbarri were afraid they might never be able to reopen. News reporters reported that some houses had been completely flattened by the cyclone. Heavily damaged structures which previously used asbestos as a building material in Kalbarri left the presence of asbestos fibres on the ground and airborne, which can be deadly when inhaled. Widespread damage was also reported in Northampton.
Shire of Northampton The Shire of Northampton is a local government area in the Mid West region of Western Australia, about north of Geraldton and about north of the state capital, Perth. The Shire covers an area of , and its seat of government is the town of N ...
President Craig Simkins described the damage as if a "bomb had gone off", with many structures having lost their roofs or being severely damaged, leaving Simkins perplexed as to whether there should be a new building code to accommodate future cyclones in the region. Recovery was estimated to take several months or even years in the small town. Access and communication to towns further north impacted by the cyclone, such as
Geraldton Geraldton ( Wajarri: ''Jambinu'', Wilunyu: ''Jambinbirri'') is a coastal city in the Mid West region of the Australian state of Western Australia, north of the state capital, Perth. At June 2018, Geraldton had an urban population of 37,648. ...
, were cut off, leaving the scale of damage in the city largely unknown. The cyclone was later declared as an 'insurance catastrophe', according to the Insurance Council of Australia. During the cyclone, one person died; a 38-year-old maintenance worker who was electrocuted in Coral Bay after attempting to secure a caravan park’s private power pole which had fallen down in the wind. There were no other reports of casualties or severe injuries. Australian Prime Minister
Scott Morrison Scott John Morrison (; born 13 May 1968) is an Australian politician. He served as the 30th prime minister of Australia and as Leader of the Liberal Party of Australia from 2018 to 2022, and is currently the member of parliament (MP) for th ...
offered federal government support for recovery in Kalbarri. A fundraiser by Lord Mayor's Distress Fund in Western Australia raised
AUD The Australian dollar (sign: $; code: AUD) is the currency of Australia, including its external territories: Christmas Island, Cocos (Keeling) Islands, and Norfolk Island. It is officially used as currency by three independent Pacific Island s ...
$2.75 million (US$2.12 million) in a little over a day to help families impacted by the cyclone. Australian footballer Jamie Cripps reportedly lost his family home which was destroyed in Northampton due to Seroja. DFES commissioner Darren Klemm said on 15 April that damage from Seroja could cost up to AUD$200 million (
US$ The United States dollar (symbol: $; code: USD; also abbreviated US$ or U.S. Dollar, to distinguish it from other dollar-denominated currencies; referred to as the dollar, U.S. dollar, American dollar, or colloquially buck) is the official ...
155 million) to repair. A total of 875 buildings were damaged by the cyclone, while at least 32 buildings were destroyed beyond repair. Around 5,840 homes remained without power over a week after the cyclone, according to
Western Power The Western world, also known as the West, primarily refers to the various nations and states in the regions of Europe, North America, and Oceania.
.


Aftermath


East Timor

East Timor Prime Minister
Taur Matan Ruak José Maria Vasconcelos (born 10 October 1956), popularly known as Taur Matan Ruak (Tetum for "Two Sharp Eyes"), is an East Timorese politician who has served as the prime minister of East Timor since 22 June 2018. He was also President of E ...
cited the floods as one of the most devastating incidents to affect the country in 40 years. The
East Timor East Timor (), also known as Timor-Leste (), officially the Democratic Republic of Timor-Leste, is an island country in Southeast Asia. It comprises the eastern half of the island of Timor, the exclave of Oecusse on the island's north-west ...
government later held an emergency meeting to assess the situation. The Civil Protection Agency of Timor Leste planned an emergency response. According to the
Lusa News Agency The Lusa News Agency ( pt, Lusa – Agência de Notícias de Portugal, SA; ) is the largest news agency in Portugal, as well as the largest news agency in the Portuguese language, incorporated on 28 November 1986 under the name of ''Agência Lus ...
, it is impossible for East Timor to currently balance the damage mitigation with the limited resources the country has. United Nations developmental coordinator Alex Tilman said East Timor would not have the necessary resources alone to recover from the cyclone.
Portugal Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of ...
was ready to send assistance to East Timor, according to Foreign Minister Augusto Santos Silva. The
European Union The European Union (EU) is a supranational political and economic union of member states that are located primarily in Europe. The union has a total area of and an estimated total population of about 447million. The EU has often been de ...
and
United Nations The United Nations (UN) is an intergovernmental organization whose stated purposes are to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and be a centre for harmoniz ...
also expressed sympathy and said that they were ready to assist the East Timor government to repair damaged infrastructure and provide assistance for victims. The East Timorese Minister of Interior distributed foods to victims in a hotel, which he said had been cooked by his wife. TSF Radio said the assistance was symbolic and far from enough to assist the victims. Local churches in Dili mobilized priests & pastors to help the victims voluntarily. The Government of East Timor declared a state of emergency to speed up the mitigation process. In addition, the government asked the
World Bank The World Bank is an international financial institution that provides loans and grants to the governments of low- and middle-income countries for the purpose of pursuing capital projects. The World Bank is the collective name for the Inte ...
for support in assessing damages, and advice on longer-term implications for disaster risk management. The World Bank published its report in December 2021. The leader of
Fretilin The Revolutionary Front for an Independent East Timor ( pt, Frente Revolucionária de Timor-Leste Independente, abbreviated as Fretilin) is a centre-left political party in East Timor. They presently hold 23 of 65 seats in the National Parliam ...
,
Mari Alkatiri Mari bin Amude Alkatiri, GCIH ( ar, مرعي بن عمودة الكثيري '; born 26 November 1949) is a Timorese politician. He was Prime Minister of East Timor from May 2002 until his resignation on 26 June 2006 following weeks of politi ...
, urged East Timor government to ask for more international assistance such as helicopter and military cargo. He said he already met with United Nations ambassador on Dili to discuss about more assistance. The Government of East Timor reintroduced COVID-19 lockdown on three cities; Dili,
Baucau Baucau ( pt, Baucau, tet, Baukau) is the second-largest city in East Timor, after Dili, the capital, which lies to its west. Baucau has about 16,000 inhabitants, and is the capital of Baucau municipality, located in the eastern part of th ...
, and Viqueque amid rising infection case after the disaster until 2 May. Transmission of other waterborne diseases such as cholera, dengue fever, and
malaria Malaria is a mosquito-borne infectious disease that affects humans and other animals. Malaria causes symptoms that typically include fever, tiredness, vomiting, and headaches. In severe cases, it can cause jaundice, seizures, coma, or death. S ...
was also expected to quickly rise due to the immense floods. The first COVID-19 death recorded in the country occurred shortly after the cyclone. Prime Minister of Australia
Scott Morrison Scott John Morrison (; born 13 May 1968) is an Australian politician. He served as the 30th prime minister of Australia and as Leader of the Liberal Party of Australia from 2018 to 2022, and is currently the member of parliament (MP) for th ...
promised additional COVID-19 vaccine doses would be diverted to East Timor.


Indonesia

Several schools on the Indonesia-Timor Leste border were evacuated by the Indonesian Army stationed there before they collapsed. Police in
Kefamenanu Kefamenanu is a town and capital of the administrative district (''kecamatan'') of Kota Kefamenanu and of the North Central Timor Regency in West Timor, Indonesia. A road connects it to Halilulik and Kota Atambua to the northeast. It had a popula ...
assisted by the army evacuated most of the town residents amid flooding in the region. Evacuation processes in the East Flores Regency was hampered by the lack of heavy equipment, limited access to the sea, and a lack of effective shelter in the area. The Indonesian electricity company PLN was only able to repair 82% of damaged power infrastructure in residential areas, while the rest was difficult to repair because of the extreme weather and floods. The City of Kupang declared a state of emergency, but they lacked emergency response funds and had limited personnel to provide a response. An emergency bridge was constructed to help victims evacuate in East Flores. Indonesian President Joko Widodo at a press conference on 5 April 2021, offered his condolences "in the name of all Indonesian people". He also urged all government institutions to mitigate the damage caused by the cyclone. In addition, the
Nasdem Party The Nasdem Party ( id, Partai NasDem) is a political party in Indonesia. It is partly funded by media baron Surya Paloh who founded the similarly named organization, National Democrats ( id, Nasional Demokrat). Despite this, and logo similarity, N ...
set up public kitchens for the victims. The chief of the
Indonesian National Board for Disaster Management The National Agency for Disaster Countermeasure (Indonesian: ''Badan Nasional Penanggulangan Bencana''; officially National Disaster Management Agency), abbreviated as BNPB, is the Indonesian board for natural disaster affairs. It was establishe ...
(BNPB), Doni Monardo planned to visit the affected regions on 5 April 2021. After the visit, he concluded that health infrastructures & facilities in most of East Nusa Tenggara are adequate, but lacked health workers & doctors. Later, the president also held a brief meeting to address the disaster.In addition to rubber boats, shelters, and personnel, the Indonesian government sent food, blankets, masks, and
COVID-19 Coronavirus disease 2019 (COVID-19) is a contagious disease caused by a virus, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The first known case was identified in Wuhan, China, in December 2019. The disease quickly ...
rapid tests. Pertamina responded by replacing 4 damaged fuel trucks, which would be used to help distribute fuel to victims in the region. As of 5 April 11:00 a.m. Western Indonesian Time (WIB), a logistical route for fuel to Adonara Island has been restored.
El Tari International Airport El Tari International Airport ( id, Bandar Udara Internasional El Tari) is an airport in Kupang, East Nusa Tenggara, Indonesia. The airport is named after El Tari (1926–1978), the governor of East Nusa Tenggara from 1966 to 1978. The airpo ...
has resumed its operations on 5 April 10:00 WIB after being closed since the night before. Indonesia's navy readied hospital ships to help treat injured survivors. Helicopters also dropped food and other essentials into remote villages, while sniffer dogs were deployed to search for the dozens missing from the cyclone. Distribution of aid was limited by the severe weather and damaged infrastructure. As the result, the government sent four helicopters and one cargo airplane to assist distribution. The People's Representative Council urged the government to speed up the distribution of relief and suggested using Indonesian army personnel to help overcome logistical hurdles. The
Ministry of Social Affairs A Ministry of Social Affairs or Department of Social Affairs is the common name for a government department found in states where the government is divided into ministries or departments. While there is some variation in the responsibilities of ...
sent aid to flood victims in the city of Bima.
Kodam IX/Udayana Kodam IX/Udayana (IX ''Military Regional Command/Udayana'') is a military area command of the Indonesian Army which is responsible for the Lesser Sunda Islands. It was established as part of the 1985 reorganisation of the Indonesian National Armed ...
personnel constructed eight shelter center, 20 field kitchens, and six field hospitals.
Hadi Tjahjanto Air Chief Marshal (Ret.) Hadi Tjahjanto (born 8 November 1963) is the Minister of Agrarian and Spatial Planning of Indonesia under President Joko Widodo's Onward Indonesia Cabinet. He is a former officer in the Indonesian Air Force who previousl ...
, the Commander of Armed Forces, sent a navy ship known as KRI Oswald Siahaan (354), a
Lockheed C-130 Hercules The Lockheed C-130 Hercules is an American four-engine turboprop military transport aircraft designed and built by Lockheed (now Lockheed Martin). Capable of using unprepared runways for takeoffs and landings, the C-130 was originally desig ...
, a helicopter, and several battalions of military engineers from Kodam IX/Udayana and
Kodam XIV/Hasanuddin (XIV Military Regional Command/Hasanuddin) is a military command area (effectively a military district) of the Military of Indonesia. It oversees the following provinces on Sulawesi island: South Sulawesi, Southeast Sulawesi and West Sulawesi. ...
to assist evacuation & reconstruction of infrastructures. The central government of Indonesia prepared additional state funds to assist victims and the reconstruction of cities and villages in the province. Indonesians organized a donation campaign for victims, especially for East Nusa Tenggara, and gathered almost 1,000,000,000 rupiahs or around $70,000 as of 6 April.
Ministry of Social Affairs A Ministry of Social Affairs or Department of Social Affairs is the common name for a government department found in states where the government is divided into ministries or departments. While there is some variation in the responsibilities of ...
gave compensation of around $1,000 each for deceased victims and $300 each to injured victims, in addition of other aids totaling around $760,000. Each family of a victim also received 500,000 rupiahs or $35 per month for them to pay rent on family's houses or local homestay, as to minimize amount of shelter camps amid COVID-19 until their house was reconstructed by the government. In addition, there's also compensation for each damaged houses; around $3,500 for heavily damaged, $1,500 for moderately damaged, and around $700 for lightly damaged. Governor of
East Java East Java ( id, Jawa Timur) is a Provinces of Indonesia, province of Indonesia located in the easternmost hemisphere of Java island. It has a land border only with the province of Central Java to the west; the Java Sea and the Indian Ocean bord ...
,
Khofifah Indar Parawansa Khofifah Indar Parawansa (born 19 May 1965) is an Indonesian politician who is the current Governor of East Java. Previously she served as the 27th Minister of Social Affairs. She resigned from the position in January 2018 in order to run in the ...
also send additional assistance & aid to affected region. COVID-19 Task Force personnel were sent to the affected regions & shelters to limit the spread of COVID-19, using experience from 2021 South Kalimantan floods and
2021 West Sulawesi earthquake An earthquake struck Majene Regency in the province of West Sulawesi, on the Indonesian island of Sulawesi on 15 January 2021, at 02:28 WITA (18:28 UTC), with a moment magnitude of 6.2. This earthquake was felt as far away as Makassar, the ca ...
. The regional police of the province inspected all of the building material stores in the region to prevent sellers putting high prices for reconstruction. As of 6 April, more than 8,400 residents across the province had been evacuated. The majority of those who evacuated (at least 7,000 people) were residents in
East Sumba Regency East Sumba Regency ( id, Kabupaten Sumba Timur) is geographically the largest of the four regencies which divide the island of Sumba, within East Nusa Tenggara Province of Indonesia. It occupies 64% (nearly two-thirds) of the entire island, being ...
. The BNPB stated that at least 12 administrative regions in East Nusa Tenggara had been affected by the cyclone, of which 8 were severely affected. Chinese President
Xi Jinping Xi Jinping ( ; ; ; born 15 June 1953) is a Chinese politician who has served as the general secretary of the Chinese Communist Party (CCP) and chairman of the Central Military Commission (CMC), and thus as the paramount leader of China, ...
offered his condolences on the disaster. On Friday, president Joko Widodo paid a visit to Adonara Island and
Lembata Regency Lembata Regency is a regency in East Nusa Tenggara province of Indonesia. Established on 4 October 1999 (under administrative Law UU 52/1999) from part of East Flores Regency, the regency covers the island of Lembata (formerly known as Lomblen), to ...
. Multiple local governments sent aids to affected areas. The government of West Sumatra sent 1.5 tons of
rendang Rendang ( ; ) is a Minang dish originating from the Minangkabau region in West Sumatra, Indonesia. It has spread across Indonesian cuisine to the cuisines of neighbouring Southeast Asian countries such as Malaysia, Singapore, Brunei and the ...
, a signature dish from the province, to East Nusa Tenggara. Additional funds of Rp 750 million were sent through BNPB, adding that funds will be allocated for the relief efforts in the region. Funds were also received from West Java, with a total of Rp 1 billion. The West Java regional government later stated: “The Governor of West Java and his administration would like to express our deepest condolences to the people of East Nusa Tenggara.” The government of Central Java sent logistical aids worth at least Rp 306 million rupiah and donated Rp 457 million rupiah to East Nusa Tenggara. The European Union provided €200,000 (over 3.4 billion Indonesian rupiah) to Indonesia. Vincent Piket, the EU ambassador to Indonesia, stated: “With this assistance, the EU is expressing its solidarity with Indonesia for the many people afflicted by Cyclone Seroja. The EU stands ready to support those in need in times of crisis,” Currently, regions affected in Indonesia already moved into rehabilitation and reconstruction process as more missing victims were found and the cyclone is moving away. After receiving orders from President Joko Widodo to relocate the survivors, Governor of East Nusa Tenggara Viktor Laiskodat urged local leaders to immediately choose the suitable locations for the relocation efforts. Reconstruction on the damaged buildings will be compensated by the government through the Indonesian Ministry of Public Works and Housing. Despite calls from several prominent public figures in the province to declare Cyclone Seroja as a national disaster, Governor of East Nusa Tenggara Viktor Laiskodat refused to do so, stating that efforts from the central government were sufficient enough to meet with the needs of the survivors.


Controversy

The lack of warnings by the government prior to the cyclone and no direct response by the local government was criticized by Indonesian netizens and
NGO A non-governmental organization (NGO) or non-governmental organisation (see spelling differences) is an organization that generally is formed independent from government. They are typically nonprofit entities, and many of them are active in h ...
s, such as WALHI, for worsening the effects of the cyclone. The hashtag ''#PrayforNTT'' became viral in Indonesia on
Twitter Twitter is an online social media and social networking service owned and operated by American company Twitter, Inc., on which users post and interact with 280-character-long messages known as "tweets". Registered users can post, like, and ...
. WALHI pressured the provincial government of the province of
East Nusa Tenggara East Nusa Tenggara ( id, Nusa Tenggara Timur – NTT; pt, Sonda Oriental) is the southernmost province of Indonesia. It comprises the eastern portion of the Lesser Sunda Islands, facing the Indian Ocean in the south and the Flores Sea in the nor ...
to declare a state of emergency and criticized the lack of a response from the governor there, Viktor Laiskodat. The
Prosperous Justice Party The Prosperous Justice Party ( id, Partai Keadilan Sejahtera, sometimes called the Justice and Prosperity Party), frequently abbreviated to PKS, is an IslamistAl-Hamdi, Ridho. (2017). ''Moving towards a Normalised Path: Political Islam in Contempo ...
criticized Indonesian president Joko Widodo for attending the marriage of Indonesian celebrity
Atta Halilintar Muhammad Attamimi Halilintar (born 20 November 1994), professionally known as Atta Halilintar or simply as Atta is an Indonesian YouTuber, content creator, social media personality, actor, singer and businessman. He is the first YouTuber in Sou ...
instead of addressing the disaster of Seroja. The governor of East Nusa Tenggara declared a state of emergency on 6 April 2021, which was thought to be too late by many. People in the affected regions asked President Joko Widodo to come instead of asking local officials to assist because they are considered too slow and uncoordinated. A member of the Indonesia National Student Movement from the region harshly criticized the local government and asked the President to directly see and discipline them. The destruction that was caused by Cyclone Seroja further exposed the lack of mitigation efforts and the vulnerability of Indonesia to natural disasters. On 7 April, due to the perceived unresponsiveness and incompetence from East Nusa Tenggara provincial disaster mitigation agency on the aftermath of Cyclone Seroja, the head of the agency, Thomas Bangke, was fired by the governor. A similar course of action was taken by the mayor of Kupang, where the head of the city's regional mitigation agency was fired for being "slow".


Retirement

Due to its onslaught, the name ''Seroja'' was retired from the naming list and was replaced by ''Rambutan''.


See also

*
Tropical cyclones in 2021 During 2021, tropical cyclones formed in seven major bodies of water, commonly known as tropical cyclone basins. Tropical cyclones will be assigned names by various weather agencies if they attain maximum sustained winds of . During the year, one ...
*
1973 Flores cyclone The 1973 Flores cyclone was the deadliest known tropical cyclone in the Southern Hemisphere, having killed 1,653 people in Indonesia in April 1973. The cyclone formed in the Banda Sea on 26 April as a tropical low pressure area, l ...
– Deadliest known tropical cyclone in the Southern Hemisphere; affected similar areas * Cyclone Guba – Brought severe damage to
Papua New Guinea Papua New Guinea (abbreviated PNG; , ; tpi, Papua Niugini; ho, Papua Niu Gini), officially the Independent State of Papua New Guinea ( tpi, Independen Stet bilong Papua Niugini; ho, Independen Stet bilong Papua Niu Gini), is a country i ...
, killing 149 * Cyclone Cempaka – Severely impacted
Java Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mos ...
and Bali, stalling just offshore * Cyclone Lili – Passed through similar areas, bringing mild to moderate impact * Cyclone Savannah – Brought significant damage to Java and Bali despite remaining well offshore


References


External links


Australian Bureau of Meteorology



Tropical Cyclone Warning Center Jakarta

Papua New Guinea National Weather Service
{{DEFAULTSORT:Seroja (2021) Tropical cyclones in 2021 2020–21 Australian region cyclone season 2021 disasters in Indonesia 2021 in East Timor April 2021 events in Asia Tropical cyclones in Indonesia Natural disasters in Indonesia Tropical cyclones in East Timor Tropical cyclones in Australia 2021 in Australia April 2021 events in Australia 2021 disasters in Australia Retired Australian region cyclones Category 3 Australian region cyclones