Tropical Storm Talas (2017) Explained

Severe Tropical Storm Talas
Formed:July 14, 2017
Dissipated:July 17, 2017
Winds:50
Pressure:985
Winds:50
Pressure:985
Year:2017
Fatalities:14 total
Damage:117800000
Areas:Vietnam, South China, Laos, Thailand, Myanmar
Season:2017 Pacific typhoon season

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 50000ha of vegetable fields, around 800ha of aquaculture, and 47600ha of rice and other subsidiary crops were affected. The storm caused an estimated US$8.8 million in damages in Hainan province, China, increased rainfall in Myanmar and Thailand, and triggered landslides and flooding in parts of Central and Northern Laos.

Meteorological history

The origins of Talas began from an area of convection, positioned between two north-south oriented ridges. On July 13, the Joint Typhoon Warning Center (JTWC) began monitoring a tropical disturbance located approximately 648km (403miles) to the southeast of Hanoi, Vietnam.[1] By the next day, at around 06:00 UTC, the Japan Meteorological Agency (JMA) classified the system as a weak tropical depression, as it started to move slowly towards the northwest at a speed of 19km/h.[2] Six hours later, the JMA began issuing advisories, stating that the system was producing 10-minute sustained winds of at least 55km/h.[3] The JTWC issued a Tropical Cyclone Formation Alert at 02:30 UTC on July 15, after satellite imagery depicted deep convection wrapping into its developing low-level circulation center, with a favorable environment for further development within Hainan.[4] With the system continuing to develop, the JMA upgraded it to a tropical storm, assigning it the name Talas.[5]

As convective banding improved, the JTWC downgraded the disturbance to a tropical depression by midday on July 15.[6] [7] Several hours later, the JTWC further upgraded it to a tropical storm after recording Dvorak estimates of T2.5, indicating 1-minute sustained winds of 40mph.[8]

On July 16, Talas gradually intensified as it became better organized in response to being located in a favorable environment, consisting of low to moderate northeasterly vertical wind shear as well as good outflow to the south.[9] At 09:00 UTC, the JMA upgraded it into a severe tropical storm after the storm attained 10-minute sustained winds of 95km/h, and a minimum barometric pressure of 985hPa; constituting its peak intensity.[10] At the same time, the JTWC recorded one-minute sustained peak winds of 95km/h while trailing along Hainan.[11]

Shortly thereafter, Talas began to weaken due to land interaction and the JMA soon downgraded the system back to a tropical storm.[12] Around 18:00 UTC, the storm made landfall in Central Vietnam, near the city of Vinh.[13] Three hours later, the JTWC issued their final advisory on Talas as it continued to degrade while progressing inland.[14] The JMA soon followed suit with their final advisory at 09:00 UTC on July 17, while the weakening storm was located over the northern portion of Laos.[15]

Preparations and impact

Vietnam

On July 15, Meteorologists expected heavy rainfall from the storm.[16] Talas made landfall near Vinh at around 18:00 UTC on July 16 as a moderate tropical storm.[13] According to the Central Steering Committee for Natural Disaster Prevention and Rescue, more than 2,700 homes were damaged in Nghe An Province. The Vietnam's National Center for Hydro-Meteorological Forecasting recorded wind gusts up to 100km/h with wind damage being reported in Nghe An, Thanh Hóa and Ha Tinh provinces.[13] Over 400mm of rain fell in the central and northern parts of the country in the two days following up to landfall, while the capital, Hanoi, received 100mm. The storm sank a coal ship late on July 16; only three of the people on board were rescued while another ten remained missing. The most affected province was Nghe An, with one fatality.[17] In the Quảng Bình Province, fishing boats were washed ashore by waves as high as 5m (16feet); there, seven people were injured. A boat carrying eight weather officials were rescued by the national guard after the storm. On July 17, flooded streets and disrupted train services stranded more than 4,000 passengers in the capital. Railway services from Hanoi to Vinh were canceled while trains from Hanoi to Saigon were delayed by five to seven hours.[18]

The storm hit the provinces of Thanh Hóa and Hà Tĩnh.[19] The Irrigation Department General Thongplew Kongjun stated that the department had multiple plans and measures to tame the impact caused by the storm. Including ordering every district to have an irrigation office and/or adding pumps.[20] The storm caused multiple severe traffic jams, and capsized a ship, injuring seven people.[21] Power lines in three provinces were damaged as a result of the storm.[22] Eight flights were cancelled by the airline VietJet Air.[23] Multiple other airlines cancelled ten other flights.[24]

Overall, in Vietnam, the storm left 14 people dead and damaged around 2,700 houses.[25] About 50 boats sank. Around 50000abbr=onNaNabbr=on of vegetable fields,[26] about 801ha of aquaculture farms, and 47632ha of rice and subsidiary crops were damaged.[27] Damages in Nghe An were reported to reach up to 993 billion₫ (US$43.7 million).[28] Total damage in Vietnam reached 1.6 trillion₫ (US$70.4 million).[29] The total cost of other damages was estimated at 2.52 trillion₫ (US$109 million).[30]

Hainan

On July 22, China's National Observatory issued a "blue alert" to Hainan province and the Beibu Gulf. About 22,901 fishing boats were moved while 39,425 people working at sea farms evacuated to Guangdong province. Winds of 62– were recorded over in some places, especially in areas around the Lingshui Li Autonomous County, as the storm neared the coast.[31] Southern portions of the province received rainfall of 3– and tourists were stranded on a remote island off the coast of Guangdong.[32] Total economic losses in Hainan Province reached CNY 24 million (US$3.5 million).[33] In total, damage by Talas in China reached CNY 60 million (US$8.8 million).[34]

Other areas

Other than Vietnam and Hainan, Laos, Myanmar and Thailand were affected with strong winds and heavy rains. Rainfall increased in Thailand between 15 and 18 July, reaching a peak of 145mm on 17 July in the Phu Phiang district of Nan province.[35] Multiple rivers in the Nan province, especially the Nan River, reportedly overflowed, causing three districts to flood.[36] The storm passed over the Laotian provinces of Xiangkhouang, Xaysomboun and Bolikhamsai early in the morning of 17 July. On that and the following day, rain caused landslides, flash flood and floods in areas of Central and Northern Laos.[37]

See also

External links

Notes and References

  1. Web site: Significant Tropical Weather Advisory for the Western and South Pacific Oceans . dead . https://archive.today/20240523014724/https://www.webcitation.org/6rvBL5mvd?url=http://gwydir.demon.co.uk/advisories/ABPW10-PGTW_201707130600.htm . 2024-05-23.
  2. Web site: Warning and Summary 140600 . dead . https://archive.today/20240523014805/https://www.webcitation.org/6rzobvGVE?url=http://gwydir.demon.co.uk/advisories/WWJP25-RJTD_201707140600.htm . 2024-05-23.
  3. Web site: July 14, 2017 . RSMC Tropical Cyclone Advisory TD . dead . https://archive.today/20240523014922/https://www.webcitation.org/6rzoHtb8Q?url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201707141200.htm . May 23, 2024 . Japan Meteorological Agency.
  4. Web site: Tropical Cyclone Formation Alert . dead . https://archive.today/20240523015324/https://www.webcitation.org/6rzpVfmZI?url=http://gwydir.demon.co.uk/advisories/WTPN21-PGTW_201707150230.htm . 2024-05-23.
  5. Web site: July 15, 2017 . RSMC Tropical Cyclone Advisory TS 1704 TALAS (1704) UPGRADED FROM TD . dead . https://archive.today/20240523014840/https://www.webcitation.org/6rzoFXN2S?url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201707150600.htm . May 23, 2024 . Japan Meteorological Agency.
  6. Web site: July 15, 2017 . Tropical Depression 06W (Talas) Warning Nr 001 . dead . https://archive.today/20240523015002/https://www.webcitation.org/6rzp8fGsk?url=http://gwydir.demon.co.uk/advisories/WTPN31-PGTW_201707151500.htm . May 23, 2024 . Joint Typhoon Warning Center.
  7. Web site: July 15, 2017 . Prognostic Reasoning for Tropical Depression 06W (Talas) Warning Nr 01 . dead . https://archive.today/20240523015242/https://www.webcitation.org/6rzpMFYLJ?url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201707151500.htm . May 23, 2024 . Joint Typhoon Warning Center.
  8. Web site: July 15, 2017 . Prognostic Reasoning for Tropical Storm 06W (Talas) Warning Nr 02 . dead . https://archive.today/20240523015123/https://www.webcitation.org/6rzpLnz3A?url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201707152100.htm . May 23, 2024 . Joint Typhoon Warning Center.
  9. Web site: July 16, 2017 . Prognostic Reasoning for Tropical Storm 06W (Talas) Warning Nr 03 . dead . https://archive.today/20240523015203/https://www.webcitation.org/6rzpLR46o?url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201707160300.htm . May 23, 2024 . Joint Typhoon Warning Center.
  10. Web site: July 16, 2017 . RSMC Tropical Cyclone Advisory STS 1704 TALAS (1704) UPGRADED FROM TS . dead . https://archive.today/20240523015525/https://www.webcitation.org/6s1zqBDhO?url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201707160900.htm . May 23, 2024 . Japan Meteorological Agency.
  11. Web site: July 16, 2017 . Prognostic Reasoning for Tropical Storm 06W (Talas) Warning Nr 04 . dead . https://archive.today/20240523015042/https://www.webcitation.org/6rzpL1zU6?url=http://gwydir.demon.co.uk/advisories/WDPN31-PGTW_201707160900.htm . May 23, 2024 . Joint Typhoon Warning Center.
  12. Web site: July 16, 2017 . RSMC Tropical Cyclone Advisory TS 1704 TALAS (1704) DOWNGRADED FROM STS . dead . https://archive.today/20240523015442/https://www.webcitation.org/6s1zp4GRr?url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201707161800.htm . May 23, 2024 . Japan Meteorological Agency.
  13. Web site: July 17, 2017 . Tropical Storm Talas (06W) . https://web.archive.org/web/20170805150036/https://www.rms.com/current-catastrophes . 5 August 2017 . Rish Management Solutions, Inc..
  14. Web site: July 16, 2017 . Tropical Storm 06W (Talas) Warning Nr 006 . dead . https://archive.today/20240523015603/https://www.webcitation.org/6s20946MW?url=http://gwydir.demon.co.uk/advisories/WTPN31-PGTW_201707162100.htm . May 23, 2024 . Joint Typhoon Warning Center.
  15. Web site: July 17, 2017 . RSMC Tropical Cyclone Advisory TD 1704 TALAS (1704) DOWNGRADED FROM TS . dead . https://archive.today/20240523015407/https://www.webcitation.org/6s1znBCnm?url=http://gwydir.demon.co.uk/advisories/WTPQ20-RJTD_201707170900.htm . May 23, 2024 . Japan Meteorological Agency.
  16. Web site: 2017-07-17 . Tropical Storm "Talas" makes landfall over central Vietnam . 2024-09-08 . The Watchers . en-US.
  17. News: Tropical Storm Talas hits Vietnam, leaves one dead. July 17, 2017. The Gulf Today. July 20, 2017. https://web.archive.org/web/20170717132226/http://gulftoday.ae/portal/6ae68744-cd78-4427-b1c0-e76a27a9c6d0.aspx. July 17, 2017. dead.
  18. Web site: July 17, 2017 . Storm Talas leaves path of destruction in Vietnam's central provinces . https://web.archive.org/web/20191112055527/http://en.nhandan.org.vn/scitech/item/5351002-storm-talas-leaves-path-of-destruction-in-vietnam%E2%80%99s-central-provinces.html . 12 November 2019 . Nhân Dân.
  19. Web site: Huong . Pham . 15 July 2017 . Tropical storm Talas bearing down on central Vietnam . 25 August 2024 . VnExpress.
  20. Web site: 2017-07-25 . Irrigation Dept follows up on water situation in Sukhothai - Thailand ReliefWeb . 2024-08-25 . reliefweb.int . en.
  21. Web site: 17 July 2017 . 9 dead or missing in Vietnam as infrastructure is damaged . 25 August 2024 . VnExpress.
  22. Web site: baotintuc.vn . 2017-07-18 . Hệ thống lưới điện hàng trăm xã bị ảnh hưởng do bão số 2 . The power grid system of hundreds of communes affected by storm No. 2 . 2024-09-08 . baotintuc.vn . vi . the remaining 3 lines in 3 provinces of Thanh Hoa, Nghe An, Ha Tinh are being damaged, the operation management units will fix them on July 17, 2017.
  23. Web site: baotintuc.vn . 2017-07-16 . Vietjet dừng 8 chuyến bay đi/đến Bắc Trung Bộ do ảnh hưởng bởi bão Talas . Vietjet stopped 8 flights to/from North Central Vietnam due to the impact of Typhoon Talas . 2024-09-08 . baotintuc.vn . vi . Specifically, flights VJ250 (Ho Chi Minh City – Thanh Hoa), VJ249 (Thanh Hoa – Ho Chi Minh City), VJ218, VJ220 (Ho Chi Minh City – Vinh), VJ219, VJ221 (Vinh – Ho Chi Minh City), VJ264 (Ho Chi Minh City – Dong Hoi), VJ265 (Dong Hoi – Ho Chi Minh City) had to stop operating. In addition, many other flights were also affected by the chain..
  24. Web site: baotintuc.vn . 2017-07-16 . Không khai thác 10 chuyến bay do ảnh hưởng của bão số 2 . Not operating 10 flights due to the impact of Typhoon No. 2 . 2024-09-08 . baotintuc.vn . vi . On July 16, Vietnam Airlines (VNA), Jetstar Pacific (JPA) and VASCO (0V) announced that, due to the impact of Typhoon No. 2 (Talas) in the North Central provinces, to ensure flight safety, airlines will not operate 10 flights in the evening of July 16..
  25. News: Storm Talas kills 14 in Vietnam, destroys homes. 19 July 2017. The Straits Times. 19 July 2017.
  26. News: July 19, 2017 . A tropical storm has left four dead, five missing in Vietnam . https://web.archive.org/web/20170719060302/http://www.chinapost.com.tw/asia/2017/07/19/499501/a-tropical.htm . 19 July 2017 . July 19, 2017 . The China Post.
  27. News: One more body found from missing ship. July 20, 2017. Viet Nam News.
  28. News: Storm-ravaged Vietnamese province closes beaches with Sonca bearing down. July 25, 2017. VN Express.
  29. Web site: Tổng cục Thống kê . Socio-economic situation in the first seven months of 2017 . https://web.archive.org/web/20170921235034/https://www.gso.gov.vn/default.aspx?tabid=621&idmid=&ItemID=18502 . 21 September 2017 . www.gso.gov.vn . If including 979.8 trillion VND of nearly 21.4 thousand enterprises changing to increase capital, the total registered capital added to the economy in 7 months of 2017 is 1,670.5 trillion VND..
  30. Web site: TỔNG HỢP THIỆT HẠI DO THIÊN TAI NĂM 2017 . 2024-03-21 . Vietnamese Government.
  31. Web site: Typhoon Talas to hit south China, 20,000 boats moored at bay. https://web.archive.org/web/20170715184553/http://news.xinhuanet.com/english/2017-07/16/c_136446617.htm. dead. July 15, 2017. July 16, 2017. Xinhua.
  32. Web site: Stranded Tourists Rescued From China Island as Tropical Storm Talas Approaches. July 16, 2017. The Weather Channel.
  33. Web site: July 17, 2017 . 海南部分地区遭受台风灾害 . Some areas of Hainan were hit by typhoons . dead . https://web.archive.org/web/20171204171131/http://www.mca.gov.cn/article/yw/jzjz/zqkb/201707/20170700005149.shtml . December 4, 2017 . December 3, 2017 . 中华人民共和国民政部 . on July 17, 135,000 people were affected in four districts of Sanya City, including Jiyang, Haitang and Tianya, and five counties (cities) such as Qionghai, Wenchang and Lingao, and 33,000 people were urgently relocated, 21,000 hectares of crops were affected, and more than 2,400 yuan of direct economic losses were lost..
  34. Web site: 30 October 2017 . MEMBER REPORT [China] ]. 14 September 2024. Typhoon Commitee. 5.
  35. Web site: 3 November 2017 . Member Report Thailand . 11 September 2024 . Typhoon Committee. 1–2.
  36. Web site: 2017-07-18 . Thailand: Tropical storm Talas causes flooding in North - Thailand ReliefWeb . 25 August 2024 . reliefweb.int . en.
  37. Web site: 3 November 2017 . Member Report Lao PDR . 11 September 2024 . Typhoon Committee. 2–3.

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