Meteorological history | |
---|---|
Formed | October 17,2023 |
Dissipated | October 20,2023 |
Tropical storm | |
10-minute sustained (JMA) | |
Highest winds | 75 km/h (45 mph) |
Lowest pressure | 1000 hPa (mbar);29.53 inHg |
Tropical storm | |
1-minute sustained (SSHWS/JTWC) | |
Highest winds | 85 km/h (50 mph) |
Lowest pressure | 999 hPa (mbar);29.50 inHg |
Overall effects | |
Casualties | 7 dead,12 missing |
Damage | $818 million (2023 USD) |
Areas affected | Vietnam,South China |
IBTrACS | |
Part of the 2023 Pacific typhoon season |
Tropical Storm Sanba was a weak but destructive tropical cyclone which brought heavy rains to Vietnam and South China. The sixteenth named storm of the annual typhoon season,the precursor of Sanba formed as a low-pressure area on October 13,west of the Philippines. The system moved north-northwest ward and gradually gaining strength due to favourable atmospheric condition. On October 17,the system intensified to a tropical depression,and became Tropical Storm Sanba the following day. Sanba later re-curved to the north-northeast,striking the western coast of Hainan. On October 20,Sanba decelerated and hit the western coast of the Leizhou Peninsula. The system weakened due to hostile environment and dissipated later that day.
The precursor of Sanba interacted with the Intertropical Convergence Zone (ITCZ),which brought heavy rains to Vietnam,sinking two fishing boats,killing three people and 12 other were missing. Due to its slow-paced movement,Sanba brought strong winds and heavy rains in Hainan and Liangguang region. The stotm killed four people and caused a damage of nearly US$800 million in China.
On October 13, a low-pressure area formed in the South China Sea, west of the Philippines, in which the system interact with the Intertropical Convergence Zone (ITCZ). [1] [2] The Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert (TCFA) at 22:00 UTC for the low-pressure area, while the system located just off the coast of Central Vietnam, analyzing the system in a favorable environment such as high sea surface temperature of 28–29 °C (82–84 °F), extremely strong divergence, and moderate wind shear. [3] Early on October 17, the Japan Meteorological Agency (JMA) said that the system had strengthened into a tropical depression. [4] The JTWC followed suit later that day, and assigned the system the number 16W. [5] Infrared satellite imagery depicts a central dense overcast (CDO) obscuring the circulation of a poorly organized depression. [5] Early on October 18, the JMA upgraded the system to a tropical storm, and assigned the name Sanba, forecasting that the storm would move north in the next few days and entered the Gulf of Tonkin. [6] The JTWC also upgraded the system strengthen to a tropical storm at the same time. [7]
A ridge to the east brought deep-layer southward wind shear, and caused the upper and the mid-level clouds being displaced. [8] Sanba made the first landfall in Dongfang, Hainan at 9 a.m. (local time, 01:00 UTC) on October 19. [9] [10] Afterwards, Sanba accelerated to the north-northeast and entered the Gulf of Tonkin. The storm benefited from favorable environmental conditions including high sea surface temperatures, displayed scattered high cloud tops in a radial direction. [11] Later that day, Sanba attained its peak intensity with 10-minute sustained winds of 45 mph (75 km/h) and a barometric pressure of 1,000 hPa (29.53 inHg). [12] At 9:45 a.m. (local time, 01:45 UTC) on October 20, Sanba made the second landfall in Zhanjiang, Guangdong. [13] The system began to turn southward and gradually weakened because of unfavorable conditions such as land interaction, cold together with dry air, and strong wind shear. [14] [15] The JTWC soon downgraded the system to a tropical depression. [15] At 7:40 p.m. (local time, 11:40 UTC), Sanba made the third and final landfall in Lingao County, Hainan. [16] The JMA downgraded the system to a tropical depression shortly thereafter and stopped issuing advisories for the system. [17] The depression continued to weaken, with the JMA declared that the depression dissipated later that day. [12] The JTWC also issued its final warning bulletin on the same day. [18]
The precursor of Sanba interacted with the ITCZ and brought thunderstorms, tornadoes and strong waves in the South China Sea, sinking two Vietnamese fishing boats near the Spratly Islands. [19] [20] [21] After two fishing boat sinked, search and rescue forces were mobilized to search for victims of the two sinking boats. [22] Searchers stopped looking for victims on October 23. [23] Three people were killed and 12 others were missing in this incident. [24] [25] The interaction between Sanba and the ITCZ, along with cold air and easterly winds blowing in from the sea, caused heavy rain in Central Vietnam, with many places recording rainfall of 120–175 mm (4.7–6.9 in) in 8 hours. [26] [27] A level 4 disaster risk warning has been issued for Thừa Thiên Huế and Da Nang, the first time that Vietnam has issued a level 4 disaster risk warning due to heavy rain. [28] [29] After Sanba intensified to a tropical storm, the National Center for Hydro-Meteorological Forecasting (NCHMF) issued an "emergency storm bulletin" due to concerns that Sanba would cause notable impacts in Vietnam, [30] [31] though the warning was later cancelled as Sanba began to weaken and unlikely to bring significant impact to Vietnam. [32] [33] The impact of Sanba in northern Vietnam is relatively minor, only Bạch Long Vĩ Island recorded near gale-force winds. [34] Total damage in Vietnam amounted to 549 billion đồng (US$22.4 million). [35]
On October 18, Sanya issued a Level III emergency response warning for flood and wind prevention. Kindergartens and nurseries in the city were closed in the afternoon, sightseeing was also suspended. [36] [37] At 17:30 (local time, 09:30 UTC), the Hainan Provincial General Department of National Defense upgraded the flood prevention emergency response level from level IV to level III. Haikou New Port, Xiuying Port and South Port were closed from 4:00 a.m. (local time) on October 19. [38] Many places on the island experienced strong winds, with the highest gust on Hainan Island reaching 52 mph (83 km/h) in Yazhou, Sanya, and the highest gust in the entire province reaching 70 mph (112 km/h) in Qizhou Liedao . Rainfall in the past 4 days on Hainan Island was generally between 100 and 300 mm (3.9 and 11.8 in), with the highest being 333.2 mm (13.12 in), recorded in Hele, Hainan. [39]
On October 18, the Guangxi Flood Prevention and Drought Relief Department launched a level IV emergency response for flood and typhoon prevention and control. [40] Some places recorded rainfall of 400–600 mm (16–24 in) and gale-force winds. The highest rainfall was 780.3 mm (30.72 in), recorded in Yinhai District, Beihai, which broke the record of highest rainfall in 24-hour timespan. [41] [42] An oil platform near Weizhou Island observed sustained winds of 64 mph (103 km/h) and a gust of 75 mph (120 km/h). [43] Heavy rain flooded roads in many places, leaving many people stranded, and saver were mobilized to rescue trapped people. [44] [45] A motor vehicle in Bobai County, Yulin was stuck while crossing a bridge flooded with 30 cm (12 in) deep. 4 people in the car were rescued. [45] A village in Bobai County was isolated, clean water and electricity were cut off. Rescue forces and necessary equipment arrived and provided necessities to more than 100 trapped households. [46] More than 30 people stranded along the road in Luchuan County were also rescued. [46] In addition, due to the effects of Sanba offshore, a Chinese cargo ship were trapped in the Gulf of Tonkin, west of Weizhou Island. The ship and 5 crew members were rescued. [47]
In Guangdong, the flood control and emergency response alert level in Zhanjiang was raised to level II, and in Maoming it was raised to level III. [48] [49] Due to Sanba, many places in Zhanjiang and Maoming were affected by heavy rains, with an average rainfall of over 200 mm (7.9 in) in 24 hours, and a maximum rainfall of over 400 mm (16 in) in 24 hours. [49] The highest one-hour rainfall in Maoming was 158.5 mm (6.24 in), recorded at a village in Maonan District, which broke the record in the city. [42] Schools in Chikan, Xiashan, Mazhang, Potou, and other places in Zhanjiang were closed on October 19. [50] Maoming has also asked schools and kindergartens in some areas to temporarily closed. [48] Several roads in Zhanjiang were heavily flooded, leaving many elderly people and children trapped. [51] Water levels exceeded the alarming levels in the upper course of Jian River and some other river sections. [44] [49] Gaozhou Reservoir discharged floodwaters because the water level at the reservoir exceeded the allowable limit. [52] Overall, 4 people were killed and more than 2 million people were affected by the storm. More than 300 houses collapsed, 138,700 ha (343,000 acres) of crops were damaged, and the damage was calculated at 5.82 billion yuan (US$796 million). [44]
Due to the combined effects of Sanba (including its precursor) and the northeast monsoon, Hong Kong and Macau experienced some rainfall and gusty winds. [53] [54] [55]
The 2010 Pacific typhoon season, with 14 named storms, was the least active Pacific typhoon season on record. Seven of them strengthened into typhoons while one reached super typhoon intensity. All of the 14 named storms developed west of 150°E.
The 2016 Pacific typhoon season is considered to have been the fourth-latest start for a Pacific typhoon season since reliable records began. It was an average season, with a total of 26 named storms, 13 typhoons, and six super typhoons. The season ran throughout 2016, though typically most tropical cyclones develop between May and October. The season's first named storm, Nepartak, developed on July 3, while the season's last named storm, Nock-ten, dissipated on December 28.
The 2018 Pacific typhoon season was at the time, the costliest Pacific typhoon season on record, until the record was beaten by the following year. The season was well above-average, producing twenty-nine storms, thirteen typhoons, seven super typhoons and six Category 5 tropical cyclones. The season ran throughout 2018, though most tropical cyclones typically develop between May and October. The season's first named storm, Bolaven, developed on January 3, while the season's last named storm, Man-yi, dissipated on November 28. The season's first typhoon, Jelawat, reached typhoon status on March 29, and became the first super typhoon of the year on the next day.
Typhoon Conson, known in the Philippines as Typhoon Basyang, was the second tropical cyclone during the 2010 Pacific typhoon season to impact the Philippines. Developing out of a tropical disturbance east of the Philippines on July 11, 2010, Conson quickly developed as it tracked nearly due west. Favorable environmental conditions, such as low wind shear and warm sea surface temperatures, allowed the system to intensify into a severe tropical storm by July 12. Around the same time, the JTWC assessed the storm to have been equivalent to a Category 1 hurricane. The following day, Conson struck Quezon Province with winds of 100 km/h (60 mph) before weakening. After crossing the archipelago, the storm entered the South China Sea where it was able to re-strengthen. By July 16, Conson attained typhoon status as it neared the southern Chinese island of Hainan. After brushing the island at peak intensity with sustained winds estimated at 130 km/h (80 mph), the storm weakened in the Gulf of Tonkin due to less favorable conditions. The storm eventually made landfall near Hanoi, Vietnam on July 17 and dissipated the following day.
The 2020 Pacific typhoon season was the first of a series of four below average Pacific typhoon seasons, and became the first with below-average tropical cyclone activity since 2014, with 23 named storms, 10 of which became typhoons and only 2 became super typhoons. This low activity was a consequence of La Niña that persisted from the summer of the year. It had the sixth-latest start in the basin on record, slightly behind 1973, and was the first to start that late since 2016. The first half of the season was unusually inactive, with only four systems, two named storms and one typhoon at the end of July. Additionally, the JTWC recorded no tropical cyclone development in the month of July, the first such occurrence since reliable records began. Despite that, this season featured Super Typhoon Goni, which made the strongest landfall worldwide in terms of 1-minute wind speed. The season's first named tropical cyclone, Vongfong, developed on May 8, while the season's last named tropical cyclone, Krovanh, dissipated on December 24. However, the season's last system was an unnamed tropical depression which dissipated on December 29.
This timeline documents all of the events of the 2012 Pacific typhoon season. The scope of this article is limited to the Pacific Ocean, north of the equator between 100°E and the International Date Line. During the season, 34 systems were designated as tropical depressions by either the Japan Meteorological Agency (JMA), the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA), the Joint Typhoon Warning Center (JTWC), or other National Meteorological and Hydrological Services such as the China Meteorological Administration and the Hong Kong Observatory. Since the JMA runs the Regional Specialized Meteorological Centre (RSMC) for the Western Pacific, they assigned names to tropical depressions which developed into tropical storms in the basin. PAGASA also assigned local names to systems which are active in their area of responsibility; however, these names are not in common use outside of the Philippines.
Tropical Storm Kujira was a tropical cyclone that prompted the PAGASA to declare the beginning of the rainy season in the Philippines. The ninth tropical depression, 8th named storm, and first storm to make landfall on China in the 2015 Pacific typhoon season, it formed as a tropical depression south of the Paracel Islands on June 19.
Typhoon Mujigae, known in the Philippines as Tropical Storm Kabayan, was the costliest typhoon to impact China in 2015. The typhoon first passed over the Philippines as a developing tropical cyclone from October 1 to 3, 2015. It then caused widespread damage in the Chinese provinces of Guangdong, Guangxi, and Hainan from October 3 to 6. Afterwards, as Mujigae weakened inland, it brought heavy rain to parts of Mainland Southeast Asia. Mujigae originated from an area of disturbed weather that formed just east of the Philippines on September 30. The disturbance slowly organized amid a favorable environment, becoming a tropical depression later that day. It traveled steadily west-northwestwards and made landfall in Central Luzon late on October 1, before crossing into the South China Sea the next morning. Mujigae strengthened rapidly on October 3, becoming a mature typhoon with 10-minute sustained winds of 155 km/h (96 mph), 1-minute sustained winds of 215 km/h (134 mph), and a minimum pressure of 950 hPa (28.05 inHg). The typhoon then made landfall over Zhanjiang, Guangdong, and weakened swiftly, dissipating inland over Guangxi on October 5.
Tropical Storm Vamco was a weak tropical cyclone which affected Indochina in mid-September 2015. Formed from a tropical disturbance on September 13, the system developed into a tropical storm and reached its peak intensity on September 14. Vamco made landfall in Vietnam and affected Laos, Thailand and Cambodia. The storm caused flooding in these countries and damages amounted to US$14.1 million. Fifteen people died in the floods.
Severe Tropical Storm Mirinae was a tropical cyclone of moderate intensity that struck Hainan Island, China and Northern Vietnam in late July 2016. The third named storm of the annual typhoon season, Mirinae formed on July 25, 2016 as a tropical depression west of Luzon, Philippines. On July 26, it moved west-northwestwards, and it had intensified into a tropical storm before making landfall on Hainan Island, China. After passing over Hainan, it intensified into a severe tropical storm and made landfall over the Red River Delta in Northern Vietnam late on July 27, and dissipated the next day.
Typhoon Sarika, known in the Philippines as Typhoon Karen, was a powerful tropical cyclone which affected the Philippines, South China, and Vietnam in mid-October 2016. The twenty-first named storm and the tenth typhoon of the annual Pacific typhoon season, Sarika developed from a tropical disturbance east of the Philippines on October 13. The system steadily strengthened as it traveled westwards, becoming a tropical storm later that day and then a typhoon on October 15. Rapid intensification commenced as Sarika turned to the west-northwest towards Luzon, reaching its peak intensity just before making landfall in Aurora early on October 16. Sarika weakened significantly as it crossed land, emerging over the South China Sea as a minimal typhoon, then weakening further to a severe tropical storm on October 17. Sarika maintained its strength for the rest of the day and made landfall in Hainan province in China on October 18. Turning to the northwest, Sarika weakened quickly as it emerged into the Gulf of Tonkin, before moving onshore once again in Guangxi province on October 19. The system dissipated shortly after.
Severe Tropical Storm Aere, known in the Philippines as Tropical Storm Julian, was a long-lived tropical cyclone that struck Central Vietnam in October 2016. The nineteenth named storm of the annual typhoon season, Aere formed on October 4, 2016 as a tropical depression to the east of Luzon, Philippines shortly after the JMA had started tracking Songda. On the next day, the system had become a tropical storm and it moved into South China Sea. During October 7, it intensified into a severe tropical storm and reached peak intensity with 10-minute winds of 110 km/h (70 mph). Shortly thereafter, due to remaining in almost the same area for hours, Aere began to weaken to a tropical storm, and on October 10, it weakened to a tropical depression, before weakening to a low-pressure area late on October 11. On October 13, Aere re-generated into a tropical depression and it made landfall in Huế, Vietnam late that day. The system moved towards Laos and Thailand before it fully dissipated on October 14.
Severe Tropical Storm Talas was a tropical cyclone that affected Vietnam in mid-July 2017. The storm was first identified as a tropical disturbance over the South China Sea on July 13 and was upgraded to a tropical depression the following day. On July 15, the depression intensified into a named storm of the 2017 Pacific typhoon season. Before making landfall in Vietnam, Talas reached its peak intensity as a severe tropical storm on July 16. It weakened to an area of low pressure on July 17 as it moved inland. Throughout Vietnam, the storm resulted in 14 fatalities and damaged approximately 2,700 homes. Rough seas caused about 50 boats to sink. Nearly 50,000 hectares of vegetable fields, around 800 ha of aquaculture, and 47,600 ha of rice and other subsidiary crops were affected. The storm caused an estimated US$8.8 million in damages in Hainan, China, increased rainfall in Myanmar and Thailand, and triggered landslides and flooding in parts of Central and Northern Laos.
Typhoon Hato, known in the Philippines as Severe Tropical Storm Isang, was a strong tropical cyclone that struck South China in August 2017. The thirteenth named storm and the fourth typhoon of the Pacific typhoon season, Hato formed as a tropical depression over the east of Luzon on 19 August. The system further developed and became a tropical storm the next day. On 21 August, Hato emerged over the northern portion of the South China Sea and reached typhoon intensity. Rapid intensification ensued on 23 August, and Hato became a Category 3-equivalent typhoon before making landfall over Jinwan, Zhuhai. The storm further weakened over land and dissipated on 24 August.
Severe Tropical Storm Pakhar, known in the Philippines as Tropical Storm Jolina, was a strong tropical storm that impacted the Philippines and South China during late August 2017. The storm followed Typhoon Hato which affected the same areas just a few days prior. Pakhar, the fourteenth named storm of the 2017 Pacific typhoon season, developed from a tropical depression to the east of Luzon during August 24 and intensified into a tropical storm later that day. Pakhar then made landfall in Aurora on August 25, before gradually intensifying and peaking as a severe tropical storm by August 27, making landfall over Taishan, Jiangmen in Guangdong Province.
The 2022 Pacific typhoon season was the third consecutive season to have below average tropical cyclone activity, with twenty-five named storms forming. Of the tropical storms, ten became typhoons, and three would intensify into super typhoons. The season saw near-average activity by named storm count, although many of the storms were weak and short-lived, particularly towards the end of the season. This low activity was caused by an unusually strong La Niña that had persisted from 2020. The season's first named storm, Malakas, developed on April 6, while the last named storm, Pakhar, dissipated on December 12. The season's first typhoon, Malakas, reached typhoon status on April 12. The season ran throughout 2022, though most tropical cyclones typically develop between May and October. Tropical storms Megi and Nalgae were responsible for more than half of the casualties, while typhoons Hinnamnor and Nanmadol both caused $1 billion in damages.
The 2023 Pacific typhoon season was the fourth and final consecutive below-average season and became the third-most inactive typhoon season on record in terms of named storms, with just 17 named storms developing, only ahead of 2010 and 1998. Despite the season occurring during an El Niño event, which typically favors activity in the basin, activity was abnormally low. This was primarily due to a consistent period of negative PDO, which typically discourages tropical storm formation in this basin. The season was less active than the 2023 Atlantic hurricane season in terms of named storms, the fourth such season on record, after 2005, 2010 and 2020. The season's number of storms also did not exceed that of the 2023 Pacific hurricane season. Only ten became typhoons, with four strengthening further into super typhoons. However, it was very destructive, primarily due to Typhoon Doksuri which devastated the northern Philippines, Taiwan, and China in July, becoming the costliest typhoon on record as well as the costliest typhoon to hit mainland China, and Typhoon Haikui in September, which devastated China, Taiwan, and Hong Kong. The season was less active in Southeast Asia, with no tropical storm making landfall in mainland Vietnam.
Tropical Storm Nangka, also known in the Philippines as Tropical Depression Nika, was a weak tropical cyclone which would be the wettest tropical cyclone in the Western Pacific on record, producing 127.8 in of rainfall in Hướng Hóa, Vietnam. Nangka would impact Hainan and parts of Indochina, which had been affected by Tropical Storm Linfa just days earlier. Nangka in total caused 4 deaths and 5 missing in China and Vietnam.
Severe Tropical Storm Kompasu, known in the Philippines as Severe Tropical Storm Maring was a very large and deadly tropical cyclone that affected the Philippines, Taiwan, and southeast China. Part of the 2021 Pacific typhoon season, Kompasu originated from an area of low pressure east of the Philippines on 6 October 2021. The Japan Meteorological Agency (JMA) classified it as a tropical depression that day. A day later, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) classified it as a tropical depression, naming it Maring. The cyclone was initially heavily disorganised, competing with another vortex, Tropical Depression Nando. Eventually, Maring became dominant, and the JMA reclassified it as a tropical storm, naming it Kompasu. Kompasu made landfall in Cagayan, Philippines, on 11 October 2021, and two days later, the storm made landfall in Hainan, China. The cyclone dissipated on 14 October 2021 while located over Vietnam.
Severe Tropical Storm Prapiroon, known in the Philippines as Tropical Depression Butchoy was a compact tropical cyclone that made landfall in Hainan and Vietnam in July 2024. It was the fourth named storm of the annual typhoon season. Prapiroon was first identified as an area of persistent convection southeast of Manila, Philippines, on July 15. Several days later, the low-pressure system crossed into the South China Sea. As the storm progressed northwestward along the southern edge of a mid-level subtropical ridge, it intensified into a tropical storm and was named Prapiroon by the Japan Meteorological Agency (JMA) around 00:00 UTC on July 21. However, a few hours later, wind shear and dry air entrainment began to affect the storm. Despite this, deep convection continued to build around the center over the next six hours, resulting in a compact system as it approached Hainan. Prapiroon made landfall near Wanning, Hainan, with winds of 95 km/h (60 mph). After making landfall, the storm maintained its well-defined eye while moving across central Hainan, leading the JMA to upgrade it to a severe tropical storm at 00:00 UTC on July 23. On July 22, the JMA estimated peak 10-minute sustained winds of 100 km/h (65 mph) and a minimum barometric pressure of 985 hPa (29.09 inHg). Despite having persistent deep convection over its center earlier, Prapiroon soon encountered high wind shear and a dry environment. By the same day, it made its second landfall in Quảng Ninh, Vietnam, becoming the first tropical cyclone to strike Vietnam in 640 days. The JMA indicated that the storm dissipated, marking the end of Prapiroon's time as a tropical cyclone on July 25.
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