Typhoon Phanfone whipped through the Tokyo metropolitan area late Sunday into early Monday, and soon after was declared a post-tropical cyclone by the U.S. Joint Typhoon Warning Center.
The typhoon's effects proved deadly. One U.S. airman was been found dead and two others were missing after waves caused by Typhoon Phanfone swept them away in Okinawa, according to a U.S. military official.
At one point on Saturday, the U.S. military's Joint Typhoon Warning Center analyzed 150 mph winds within Phanfone, designating it super typhoon.
The Japan Meteorological Agency, the official regional center for tropical cyclone forecasts in the western North Pacific, indicated 10-minute sustained winds as high as 110 mph within Phanfone Saturday. JMA's 10-minute wind speeds are usually lower than the 1-minute wind standard used by the U.S.
Phanfone strengthened from a Category 1 equivalent typhoon (75 mph estimated max winds) early on the evening of October 1, local time (Japan is 13 hours ahead of U.S. EDT) to a Category 4 equivalent typhoon (130 mph estimated max winds) just 24 hours later, a jump of 55 mph (or 50 knots) in 24 hours.
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