Typhoon Wanda (1962)

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FormedAugust 27, 1962
DissipatedSeptember 1, 1962
Lowestpressure960 hPa (mbar); 28.35 inHg
Highestwinds175 km/h (110 mph)
Typhoon Wanda
TIROS weather satellite image of Typhoon Wanda taken on August 30, 1962 at 00:23 UTC
Meteorological history
FormedAugust 27, 1962
DissipatedSeptember 1, 1962
Typhoon
10-minute sustained (JMA)
Lowest pressure960 hPa (mbar); 28.35 inHg
Category 2-equivalent typhoon
1-minute sustained (SSHWS/JTWC)
Highest winds175 km/h (110 mph)
Lowest pressure949 hPa (mbar); 28.02 inHg
Overall effects
Fatalities434
Areas affectedBritish Hong Kong, Portuguese Macau and China
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Part of the 1962 Pacific typhoon season

Typhoon Wanda was one of the most intense tropical cyclones on record in Hong Kong. It was the 59th disturbance in the record-breaking 1962 Pacific typhoon season, forming in August east of the Philippines. Typhoon Wanda reached peak winds of 175 km/h (110 mph) in the South China Sea, and it made landfall on Hong Kong on September 1, producing gusts of 261 km/h (161 mph) which, in combination with a high storm surge, damaged thousands of huts and left 72,000 people homeless. Wanda left a total of 434 deaths, and it is estimated that an identical typhoon striking today would cause HK$2.6 billion ($335 million USD) in losses.

Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
  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

The precursor disturbance to Typhoon Wanda was first observed on August 23 near Pohnpei in the Federated States of Micronesia. That day, a circulation formed in the interaction between the Mid-Pacific trough and an easterly wave, with energy from a surge in the Easterlies in the Southern Hemisphere. Initially winds were very weak, and it tracked west-northwestward while slowly gaining intensity.[1] The official track from the Japan Meteorological Agency (JMA) indicated the system first developed into a tropical cyclone on August 25,[2] whereas the Joint Typhoon Warning Center (JTWC) initiated advisories two days later, after it was observed by the Hurricane Hunters. It was designated Tropical Depression 59 while located about 1,120 km (700 mi) northeast of the Philippines.[1]

Throughout most of its duration, the cyclone maintained a general west-northwest track, although initial forecasts had a northward bias that anticipated a track into Taiwan. On August 28, reconnaissance aircraft reported winds of 75 km/h (45 mph), or tropical storm status; as such, the JTWC named the system Wanda. Throughout the day, Wanda quickly intensified, with the pressure dropping to 992 mbar and the winds reaching 110 km/h (70 mph) by the end of the day. The next day, Wanda attained typhoon status, and on August 30 it traversed the Luzon Strait between the Philippines and Taiwan.[1] By that time, the typhoon was about 1,600 km (1,000 mi) wide, and the next day rainbands began affecting southeastern China and Hong Kong.[3]

While approaching southeastern China, Wanda reached its peak strength of 175 km/h (110 mph) in 1-minute winds, with the JTWC estimating a minimum pressure of 949 mbar.[1] The typhoon weakened slightly before making landfall on Hong Kong at 0000 UTC on September 1, with winds of 150 km/h (90 mph).[1] A combination of cold air and land interaction caused Wanda to weaken rapidly, and the JTWC discontinued advisories about 18 hours after Wanda moved ashore.[1] According to the JMA track, the system turned southwest into the Gulf of Tonkin, intensifying slightly before shifting southeastward and dissipating over Hainan on September 4.[2]

Typhoon Wanda was fairly well forecasted, compared to other storms during the year. The average forecast error for 24 hours was about 260 km (160 mi), whereas for 48 hours, it was 415 km (255 mi); both values were less than the seasonal average.[4]

Impact

See also

References

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