Typhoon Gay

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Map key
Saffir–Simpson scale
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
Disc Plain black.svg Tropical cyclone
Solid black.svg Subtropical cyclone
ArrowUp.svg Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

In early November, a monsoon trough over the Gulf of Thailand showed signs of tropical cyclogenesis. A small, concentrated area of convection quickly developed over a low-pressure area within the trough, and on 2 November the system became sufficiently organized for the Joint Typhoon Warning Center (JTWC) to issue a Tropical Cyclone Formation Alert. [nb 3] Owing to its small size, the system began strengthening within the narrow gulf by taking advantage of warm waters and good outflow. Moving generally northwestward, it became a tropical depression later that day and underwent rapid intensification. As the newly named Tropical Storm Gay strengthened, it "presented a paradox to forecasters", according to Lieutenant Dianne K. Crittenden; synoptic data from Malaysia and Thailand indicated decreasing wind speeds and increasing barometric pressures around the storm, but these observations were later interpreted as increased subsidence. [3]

Strengthening faster than anticipated, Gay attained typhoon status early on 3 November. Later that day, the storm developed an eye before passing over the Seacrest, an oil drilling ship. [3] On 4 November, Gay's winds increased to 185 km/h (115 mph), equivalent to a Category 3 hurricane on the Saffir–Simpson hurricane scale, before making landfall in Chumphon Province, Thailand, at 0600  UTC. [4] The Japan Meteorological Agency assessed that the storm had ten-minute sustained winds of 140 km/h (85 mph) and a pressure of 960  mbar (hPa; 28.35  inHg). [5] [nb 4] Crossing the Kra Isthmus, Gay weakened to minimal typhoon status as it entered the Bay of Bengal. [3] [4] According to the India Meteorological Department (IMD), [nb 5] Gay was the first typhoon since 1891 to form in the Gulf of Thailand and enter the Bay of Bengal. [8] Responding to a ridge to its north, Gay maintained a west-northwestward to northwestward track for the next four days. The storm gradually restrengthened as it moved through an area of low wind shear and warm waters; however, this was limited by restrictions to the cyclone's outflow. [3] Early on 6 November, Gay passed near the Andaman Islands as a Category 2-equivalent cyclone. [4]

Gay at its initial peak intensity on 3 November, hours before making landfall in the Malay Peninsula Gay Nov 4 1989 0038Z.png
Gay at its initial peak intensity on 3 November, hours before making landfall in the Malay Peninsula

After changing little in intensity for much of 6 November, Gay strengthened as the ridge to its north intensified and the previous restrictions to its outflow diminished. The storm moved due west through a small fetch of warmer waters, fueling the process of intensification over the next 42 hours. Based on estimates provided through the use of the Dvorak technique, the JTWC assessed Gay to have attained its peak intensity as a Category 5-equivalent cyclone with winds of 260 km/h (160 mph) early on 8 November. [3] [4] Around this time, the IMD estimated that the storm had three-minute sustained winds of 230 km/h (145 mph), classifying Gay as a modern-day super cyclonic storm. [1] [9] Additionally, the agency estimated the cyclone's central pressure to have decreased to 930 mbar (hPa; 27.46 inHg). [10] Around 1800 UTC, Gay made landfall over a sparsely populated area near Kavali, India, in Andhra Pradesh. Upon coming ashore, the storm's eye was about 20 km (12 mi) wide, with gale-force winds within 95 km (60 mi) of the center. [3] [11] Now over land, Gay no longer had access to warm waters, causing it to weaken to a tropical storm less than twelve hours after this landfall. [3] The storm continued to deteriorate while moving across India, before it completely dissipated over Maharashtra on 10 November. [4]

Impact and aftermath

Gulf of Thailand

The most powerful storm to affect the Gulf of Thailand in more than thirty-five years, Gay produced 6–11 m (20–36 ft) swells which caught many ships in the region off-guard. [12] At least 16 vessels were reported missing by 5 November, including the 106 m (348 ft) Unocal Corporation oil drilling ship Seacrest . [13] According to survivors, the vessel received no warning of the developing typhoon. [14] Just when all crew members were about to abandon ship, the eye passed over. Winds fluctuated violently and changed direction, preventing the ship from remaining stabilized despite being within safe operating limits. The vessel abruptly capsized with all 97 crew members on board during the overnight hours of 3 November, before any life boats could be deployed. [13] [14] Initial rescue attempts on 4 November were hampered by rough seas. [15] Two days after the sinking, four rescue ships and two helicopters in the region were searching for survivors; [13] four people were rescued from the wreckage on 6 November. Divers from the Thai Navy were sent to search the capsized vessel for anyone trapped inside. [16] Of the crew, only six survived; 25 bodies were recovered, and the remaining 66 members were presumed dead. [14] [17] Losses from the sinking of the Seacrest totaled $40 million. [18] Another 20 cargo and fishing ships sank during the storm, resulting in 140 fatalities. [19]

Thailand

Typhoon Gay
Kavali Cyclone of 1989
Gay 1989-11-08 0830Z.jpg
Gay at peak intensity before making landfall on India, on 8 November
Effects in Thailand [20]
Casualties and damage
ProvinceDeathsMissingDamage
Chumphon 4460$439,736,924
Prachuap Khiri Khan 1984$7,810,000
Ranong 210$3,550,000
Pattani 20N/A
Surat Thani 660$2,778,250
Rayong 350$1,259,023
Phetchaburi 10$879
Trat 00$63,008
Offshore1840$1,210,938
Seacrest910$40,000,000
Total833134$496,511,534
Downed trees and damaged buildings in Chumphon Province Chumphon typhoon damage 1.jpg
Downed trees and damaged buildings in Chumphon Province

Striking Thailand with unprecedented strength, Typhoon Gay caused catastrophic damage across many of its provinces. [12] Areas between Chumphon and Rayong provinces were severely affected by heavy rains, high winds and large swells. [21] Rainfall amounts peaked at Chumphon, where 7.64 inches (194 mm) fell during the cyclone's passage. [22] Widespread disruption of communication and electricity occurred in most areas south of Bangkok; many households remained without power for weeks. [23] Damaging winds uprooted numerous trees and power poles and toppled wooden houses built on stilts. [24] Exacerbated by deforestation, [20] flash flooding triggered by the storm damaged or destroyed thousands of homes and caused at least 365 fatalities. [25] Several towns and villages across Chumphon province were devastated, and one of the destroyed villages "looked like it had been bombed" according to the Bangkok Post . [26] Entire districts were reportedly "flattened" in Chumphon and Prachuap Khiri Khan provinces. [24] The typhoon destroyed many schools across Chumphon and Surat Thani provinces, many of which were constructed of wood. All structures close to the storm's path had their windows and doors blown out, and some multi-story buildings lost their upper floors. A few schools constructed from reinforced concrete sustained little damage. [27] More than a thousand roads and 194 bridges were damaged or washed away. [20] At the height of the floods, over 250,000 hectares (620,000 acres) of land was under water. [28] Onshore, 558 fatalities were attributed to the storm, and another 44 died just offshore. [20] Throughout Thailand, approximately 47,000 homes were damaged or destroyed, and more than 200,000 people were affected, of which about 153,000 were left homeless. [20] [28] Monetary losses reached 11 billion baht (US$456.5 million), ranking Gay as one of the costliest disasters in the country's history. [29]

Within a week of the storm's passage, the Government of Thailand began distributing relief goods to residents throughout the affected provinces. [23] Despite the effort by the government, 2,500 people from Pa Thiew and Tha Sae demonstrated for additional and more intensive aid on 9 November. These protests were soon dispersed. [30] Following considerable criticism for downplaying the impact of the typhoon, Prime Minister Chatichai Choonhavan delayed his visit to the United States to oversee relief efforts. [25] By 15 November the United States pledged to donate US$25,000 for recovery operations. Telephone connection was restored from Bangkok to Prachuap Khiri Khan by this time; however, areas further south remained disconnected. Generators were brought in to keep hospitals and government offices running since much of Chumphon Province remained without electricity for more than two weeks. As the scale of damage became more apparent, a request for international aid was made by 17 November to the United Nations Disaster Relief Organization. Upon the announcement of the request, six countries pledged to provide nearly US$510,000 in funds collectively. [20] [23] Agriculture across Surat Thani Province was severely affected by the typhoon in the long-term as well. In the four years following Typhoon Gay, land use for orchards, rubber, and oil palm plantations decreased from 33.32 percent to 30.53 percent. Additionally, rice paddy coverage decreased from 22.96 percent to 13.03 percent. [31]

Following post-storm surveys, it was determined that most of the severely damaged schools had been built improperly –building codes in Thailand mandate that structures withstand up to 120 kgf/m2 of pressure from winds. In the years following the typhoon, studies determined how best to rebuild: reinforced concrete structures which can last fifty years. [27]

India

After crossing the Malay Peninsula, Gay moved through the Andaman Islands on 6 November. As a precautionary measure, all air and sea traffic were suspended to the region. Winds in excess of 120 km/h (75 mph) battered North Andaman Island, causing two structures to collapse. [8] A few days before the cyclone made landfall, officials in Andhra Pradesh began evacuating roughly 50,000 residents along the coast and stockpiled relief goods. Some people were forced to leave vulnerable locations in the Visakhapatnam and Srikakulam districts. [32] [33] Local meteorologists warned that the storm was comparable to a cyclone in 1977 that killed more than ten thousand. [34] Striking the southern coast of Andhra Pradesh, Gay produced wind gusts estimated at 230 km/h (145 mph). [35] Along the coast, a storm surge of 3.5 m (11 ft) inundated areas up to 3 km (1.9 mi) inland, washing away numerous structures. [10] [36] About 20 km (12 mi) outside of Kavali, a 91 m (299 ft) tall, steel lattice microwave tower collapsed after experiencing winds estimated at 142 km/h (88 mph). [37] Transportation and communication across the region was disrupted and 20,000 homes were damaged or destroyed, leaving at least 100,000 people homeless. [38] Nearly every structure in Annagaripalem were severely damaged or destroyed. [39] Offshore, 25 fishermen drowned near Machilipatnam after ignoring warnings to return to port. [40] Throughout Andhra Pradesh, 69 fatalities and

See also

Notes

  1. ↑ All sustained wind speeds are based on one-minute standards unless otherwise stated.
  2. ↑ All damage figures in the article are in 1989 United States dollars (USD) unless otherwise stated.
  3. ↑ The Joint Typhoon Warning Center is a joint United States Navy –United States Air Force task force that issues tropical cyclone warnings for the western Pacific Ocean and other regions. [2]
  4. ↑ The Japan Meteorological Agency is the official Regional Specialized Meteorological Center for the western Pacific Ocean. [6]
  5. ↑ The India Meteorological Department is the official Regional Specialized Meteorological Center for the northern Indian Ocean. [7]

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  14. 1 2 3 "Unocal may scuttle Seacrest; only six survive". Oil & Gas Journal. 20 November 1989. p. 43. – via Lexis Nexis (subscription required)
  15. ↑ "Divers Search Ship". The Washington Post. 5 November 1989. p. A39. – via Lexis Nexis (subscription required)
  16. ↑ Thomas Perry (6 November 1989). "4 Survivors Rescued From Capsized Oil Ship In Gulf Of Thailand". The Globe and Mail. Canada. – via Lexis Nexis (subscription required)
  17. ↑ "250 feared killed by Typhoon Gay". The Independent. London. 6 November 1989. p. 10. – via Lexis Nexis (subscription required)
  18. ↑ Neale Prior & Malcolm Brown (6 November 1989). "Hope Fades for Missing Drillers". The Sydney Morning Herald. Sydney, Australia. p. 6. – via Lexis Nexis (subscription required)
  19. ↑ Neil Kelly (6 November 1989). "Typhoon in Thailand claims 250 victims". The Times. London, England. – via Lexis Nexis (subscription required)
  20. 1 2 3 4 5 6 Vipa Rungdilokroajn (February 1990). Natural Disasters in Thailand (PDF) (Report). Bangkok, Thailand: Universidad Nacional Autónoma de Nicaragua. Archived from the original (PDF) on 26 April 2012. Retrieved 16 December 2011.
  21. ↑ "Captain stayed to fight storm". Hobart Mercury. Reuters. 8 November 1989. – via Lexis Nexis (subscription required)
  22. ↑ Roth, David M. (3 January 2023). "Tropical Cyclone Point Maxima". Tropical Cyclone Rainfall Data. United States Weather Prediction Center. Retrieved 6 January 2023.PD-icon.svg This article incorporates text from this source, which is in the public domain.
  23. 1 2 3 "Thailand Typhoon Gay Nov 1989 UNDRO Information Report 1–4". United Nations Department of Humanitarian Affairs. ReliefWeb. 21 November 1989. Retrieved 14 December 2011.
  24. 1 2 "Frantic hunt for victims of Thai typhoon". Hobart Mercury. Bangkok, Thailand. Agence France-Presse. 7 November 1989. – via Lexis Nexis (subscription required)
  25. 1 2 "360 Die in Flash Floods; Thailand". The Sun Herald. Sydney, Australia. 12 November 1989. p. 9. – via Lexis Nexis (subscription required)
  26. ↑ "Typhoon Brings Mayhem". Sydney Morning Herald. Bangkok, Thailand. Associated Press. 6 November 1989. p. 14. – via Lexis Nexis (subscription required)
  27. 1 2 Kriangsak Charanyanond (1996). "Multi-Purpose Buildings for Disaster Situations in Thailand" (PDF). United Nations Educational, Scientific and Cultural Organization. Archived from the original (PDF) on 21 October 2013. Retrieved 2 April 2012.
  28. 1 2 Manu Omakupt (August 1992). "Application of Remote Sensing and GIS for Renewable Resources Damaged by Typhoon 'Gay': Chumphon Province" (PDF). Thailand: International Society for Photogrammetry and Remote Sensing. Retrieved 16 December 2011.
  29. ↑ "Thailand Country Report". Asian Disaster Reduction Center. 1998. Retrieved 15 December 2011.
  30. ↑ "Rage of typhoon victims". Hobart Mercury. Bangkok, Thailand. Agence France-Presse. 9 November 1989. – via Lexis Nexis (subscription required)
  31. ↑ Absornsuda Siripong; Wish Siripong & Takashige Sugimoto (1997). "Landuse changes at Surat Thani, Southern Thailand from 1973 to 1993". Chulalongkorn University Faculty of Science, Department of Marine Science. Retrieved 2 April 2012.
  32. ↑ "Typhoon's toll: some 200 dead, 20,000 homeless". The Vindicator. United Press International. 9 November 1989. p. 36. Retrieved 17 December 2011.
  33. ↑ "Typhoon Threatens Crowded Coast of India". Los Angeles Times. Bangkok, Thailand. United Press International. 9 November 1989. Retrieved 15 December 2011.
  34. ↑ Paul Wedel (8 November 1989). "Typhoon Gay heads toward India". Bangkok, Thailand. United Press International. – via Lexis Nexis (subscription required)
  35. ↑ "Weather World: India hit by 200mph winds". The Guardian. London, England. 14 November 1989. – via Lexis Nexis (subscription required)
  36. ↑ A. D. Rao (November 2006). "On recent developments in storm surge inundation modelling" (PDF). Centre for Atmospheric Sciences. Archived from the original (PDF) on 12 May 2013. Retrieved 17 December 2011.
  37. ↑ A. Abraham; P. Harikrishna; S. Gomathinayagam; N. Lakshmanan (September 2005). "Failure investigation of microwave towers during cyclones – A case study". Journal of Structural Engineering. 32 (3): 147–157.
  38. ↑ "Typhoon Death Toll Rises; 500 Missing Off Thailand Coast". Los Angeles Times. Los Angeles, California. Reuters. 11 November 1989. Retrieved 15 December 2011.
  39. 1 2 "Case No.E5/3311/2009". Orders of Joint Collector. 12 December 2009. Archived from the original (.DOC) on 23 April 2012. Retrieved 17 December 2011.
  40. ↑ "Cyclone Kills 25". New Delhi, India. Associated Press. 9 November 1989. – via Lexis Nexis (subscription required)
  41. ↑ "Historical records of Severe Cyclones which formed in the Bay of Bengal and made landfall at the eastern coast of India during the period from 1970–1999". India Meteorological Department. 1999. Archived from the original on 25 September 2014. Retrieved 17 December 2011.

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