Typhoon Percy (1990)

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Typhoon Percy (Klaring)
Typhoon (JMA scale)
Category 4 typhoon (SSHWS)
Typhoon Percy late on June 24
FormedJune 20, 1990 (June 20, 1990)
DissipatedJune 30, 1990 (June 30, 1990)
Highest winds10-minute sustained: 150 km/h (90 mph)
1-minute sustained: 215 km/h (130 mph)
Lowest pressure950 hPa (mbar); 28.05 inHg
Fatalities25 total
Areas affectedCaroline Islands, Philippines, Taiwan, south China
Part of the 1990 Pacific typhoon season

Typhoon Percy, known in the Philippines as Typhoon Klaring, was the third

Carolina Islands. Thirty homes were damaged and airline services were halted in and out of Yap. Farther south-southwest, seven homes were destroyed on the Ngulu Atoll. Furthermore, one boy was killed on Koror, where numerous homes lost their roofs and communication lines were downed. Percy then turned back to the west-northwest and became a typhoon on June 23. It then began to deepen at a faster rate, with Percy attaining its maximum intensity of 145 km/h (90 mph) on June 25. Two days later, on June 27, increased wind shear
began to induce a weakening trend and the typhoon brushed Luzon, where eight people were killed and over 30,000 lost their homes. Despite that however, damages in the country was minor.

After tracking through the

US$28 million (¥
190 million).

Meteorological history

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
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
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

Typhoon Percy originated from the eastern end of the Western Pacific

subtropical ridge to its north.[1] By June 22, Percy was upgraded into a severe tropical storm by the JMA.[4] Following the development of an outflow channel to its south, hints of an eye became visible on satellite imagery. Based on a Dvorak classification of T4.0/120 km/h (75 mph), the JTWC upgraded Percy into a typhoon on the evening of June 23,[1] with the JMA subsequently following suit in the morning of June 24.[2]

After moving away from the Caroline Islands, the typhoon began to intensify at a faster clip as an outflow channel to its north opened,[1] even though the eye was initially ragged. On the evening of June 24, the JTWC raised the intensity of the system to 200 km/h (125 mph).[4] Early on the next day, the JTWC estimated that Percy obtained its peak intensity based on the Dvorak estimate of T6.0/210 km/h (130 mph) and a clear eye.[1] Meanwhile, the JMA reported that Percy attained its maximum intensity of 145 km/h (90 mph) and a minimum barometric pressure of 960 mbar (28.3 inHg).[4] Increased vertical wind shear took toll on the storm,[1] and by June 27, the JTWC dropped the intensity of the storm to 175 km/h (110 mph)[4] as the storm passed over northeastern Luzon.[6] Overland, the storm weakened slightly, but remained a typhoon upon entering the South China Sea.[6] Both computer models and the JTWC expected Percy to begin recurvature; however, the subtropical ridge did not weaken as expected and Percy continued west-northwest instead.[1] At 00:00 UTC on June 29, the JMA downgraded Percy to a severe tropical storm,[2] although the JTWC suggested that Percy was still a typhoon at the time.[4] Shortly thereafter, Percy moved onshore around 130 km (80 mi) southwest of Xiamen.[6] At 06:00 UTC, the JTWC downgraded Percy into a tropical storm, noting that the storm had become less organized.[1] By June 30, both the JTWC and JMA had ceased tracking the system, which had dissipated inland.[1][2]

Impact

During its formative stages, Percy affected several of the Caroline Islands. The storm first passed about 75 km (45 mi) south of Sorol. The island of Pegelmol was nearly cut in half by the system by storm surge. Taro patches, coconut trees, and other crops were almost completely wiped out. Percy came within 100 km (60 mi) of Yap to the south-southwest, where gusts of up to 105 km/h (65 mph) were felt. There, widespread flooding was reported due to storm surge, with most roads on the island requiring closure[1] and 30 homes being damaged.[7] Airline services in and out Yap were halted.[8] To the south-southwest of Yap, the island of Ngulu Atoll bore the brunt of the typhoon. Gusts of up to 130 km/h (80 mph) resulted in the destruction of all crops on the island. Furthermore, seven homes were demolished while many others only lost their roofs. However, there were no fatalities. The typhoon passed 230 km (145 mi) north of Koror,[1] where a boy perished when he was swept by rain into mangrove trees near his home.[9] Meanwhile, radio towers, power lines and television lines were downed as several houses lost their roofs.[1]

Typhoon Percy was the third typhoon of 1990, and second within a week, after

Typhoon Ofelia, to threaten the Philippines.[10] In the province of La Union, landslides killed six people. In suburban Quezon City, police reported that a woman fell into a creek and drowned. The Philippine Red Cross indicated that a baby girl drowned and two other individuals were listed as missing in floods in the Ilocos Region. According to the social welfare department, 31,206 people in 6,143 families lost their homes.[11] Overall, damage in the country was light.[12]

The typhoon posed enough of a threat to

High Island received 245 mm (9.6 in) of rain during the passage of the storm, the highest in the region, 193 mm (7.6 in) fell in a 24-hour period. These rains resulted in flooding, especially in the New Territories, where there was slight damage to crops. In Kwai Chung, floodwaters were 0.6 m (2.0 ft) deep, sweeping away a ten-year-old boy. Two other villages lost power and eleven people had to be evacuated.[6]

In the provinces of Fujian and Guangdong of China, power lines were downed. Farm production was reduced by 400 million catties in Fujian. In

US$5.7 million).[nb 3] Elsewhere, 270,000 ha (670,000 acres) of farmland was flooded, including 174,000 ha (430,000 acres) of rice in Shantou. Ninety-five structures were destroyed and two hundred and one were damaged. Roughly 20 km (12 mi) of a highway was destroyed. Damage totaled ¥49 million (US$10 million). Overall, greater than 6,650 homes were damaged and numerous fishing boats sunk. Sixteen people were killed throughout southeastern China[13] and more than 100 others sustained injuries.[6] Damage was estimated at US$28 million.[13]

See also

Notes

  1. Regional Specialized Meteorological Center for the western Pacific Ocean.[3]
  2. sustained over 10 minutes, while estimates from the United States-based Joint Typhoon Warning Center are sustained over 1 minute. 10-minute winds are about 1.14 times the amount of 1-minute winds.[5]
  3. ^ Currencies can be converted to United States Dollars using (New People's Currency) Yuan Measuring worth with an exchange rate of the year 1990.

References

  1. ^ a b c d e f g h i j k l m n o Joint Typhoon Warning Center; Naval Pacific Meteorology and Oceanography Center (1992). Annual Tropical Cyclone Report: 1990 (PDF) (Report). United States Navy, United States Air Force. Retrieved January 16, 2019.
  2. ^
    .TXT
    )     (Report). Retrieved January 16, 2019.
  3. ^ "Annual Report on Activities of the RSMC Tokyo – Typhoon Center 2000" (PDF). Japan Meteorological Agency. February 2001. p. 3. Retrieved January 16, 2019.
  4. ^ a b c d e f Kenneth R. Knapp; Michael C. Kruk; David H. Levinson; Howard J. Diamond; Charles J. Neumann (2010). 1990 Typhoon Percy (1990171N11148). The International Best Track Archive for Climate Stewardship (IBTrACS): Unifying tropical cyclone best track data (Report). Bulletin of the American Meteorological Society. Retrieved January 16, 2019.
  5. ^ Christopher W Landsea; Hurricane Research Division (April 26, 2004). "Subject: D4) What does "maximum sustained wind" mean? How does it relate to gusts in tropical cyclones?". Frequently Asked Questions. National Oceanic and Atmospheric Administration's Atlantic Oceanographic and Meteorological Laboratory. Retrieved January 16, 2019.
  6. ^ a b c d e Hong Kong Observatory (1991). "Part III – Tropical Cyclone Summaries". Meteorological Results: 1990 (PDF). Meteorological Results (Report). Hong Kong Observatory. p. 15. Archived from the original (PDF) on October 23, 2019. Retrieved January 16, 2019.
  7. ^ "Typhoon Batters Eastern China, Another Gains Strength in Pacific". Associated Press. June 25, 1990.  – via Lexis Nexis (subscription required)
  8. ^ "High Wind, Heavy Rain Leave Boy Dead, Palau Battered". Associated Press. June 24, 1990.  – via Lexis Nexis (subscription required)
  9. ^ "Typhoon Percy Heads For Philippines, Gains Speed After Striking Palau". Associated Press. June 24, 1990.  – via Lexis Nexis (subscription required)
  10. ^ "Powerful typhoon Percy roars toward Philippines". United Press International. June 25, 1990.
  11. ^ "Typhoon kills eight in Philippines". United Press International. June 28, 1990.  – via Lexis Nexis (subscription required)
  12. ^ "Earthweek: A Diary of the Planet". Toronto Star. July 1, 1990. p. B6.  – via Lexis Nexis (subscription required)
  13. ^ a b Disaster History: Significant Data on Major Disasters Worldwide, 1900–Present (PDF) (Report). United States Agency for International Development. August 1993. p. 51. Retrieved May 26, 2019.
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