Typhoon Flo (1990)
| Typhoon (JMA scale) | |
|---|---|
| Category 5 (Saffir–Simpson scale) | |
Super Typhoon Flo at peak intensity
|
|
| Formed | September 8, 1990 |
| Dissipated | September 22, 1990 |
| (Extratropical after September 20) | |
| Highest winds |
10-minute sustained: 220 km/h (140 mph) 1-minute sustained: 270 km/h (165 mph) |
| Lowest pressure | 890 hPa (mbar); 26.28 inHg |
| Fatalities | 38 dead, 12 missing, 90 injured |
| Damage | $4 billion (1990 USD) |
| Areas affected | Japan |
| Part of the 1990 Pacific typhoon season | |
Super Typhoon Flo was a powerful Category 5 typhoon that killed over 30 people and caused over $4 billion (1990 USD) in damages when it struck Honshū, Japan in mid-September 1990. The twelfth typhoon and first super typhoon of the 1990 Pacific typhoon season, it formed on September 8, as Tropical Depression 20W. It reached typhoon status on September 15, 1990. It rapidly intensified on the 16th and 17th to a 165 mph super typhoon near Okinawa. Vertical shear weakened it as it recurved to the northeast, and Flo hit Honshū on the 19th as a 155 km/h (100 mph) typhoon. It continued rapidly northeastward, became extratropical on the 20th, and dissipated on the 22nd.
Widespread flooding and landslides killed thirty-two people and caused billions of dollars in property damage. Typhoon Flo was the costliest typhoon in the West Pacific at the time. Now it ranks as the 6th costliest Western Pacific typhoon of all time, only to be surpassed by Typhoons Mireille, Songda, Fitow, Prapiroon and Herb.
Tropical Depression 20W developed over the waters about 430 kilometers (270 miles) east-southeast of Guam on September 8 and tracked steadily northwestwards over the next four days. The system reached Tropical Storm strength and was assigned the name Flo. During that time, it rapidly intensified and attained typhoon intensity about 780 kilometers (480 miles) southeast of Okinawa on the evening of September 15.
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