3D flyby of Super-Typhoon Usagi - heading toward Hong Kong

3D flyby of Super-Typhoon Usagi - heading toward Hong Kong

Super-Typhoon Usagi is currently the strongest active storm on the planet, and the strongest so far this year. It is now rumbling across the Western Pacific near Taiwan and the Philippines. Packing winds as strong as 260 km/h (162 mph) Usagi is forecast to plow through the Luzon Strait. It is expected to continue toward southern China but is now slowly weakening.

Landfall is expected near Hong Kong on September 22 at about 12:00 UTC (8 p.m. local time). The latest JTWC forecast projects that Usagi will pass north of the Philippines in the next couple days and then pass very close to the southern tip of Taiwan on September 21. This path exposes southern Taiwan to the most dangerous part of the typhoon.

Wind strength of Usagi is now equivalent in power to a Category 5 hurricane and the system measures more than 1 100 km (683 miles) across.

IR satellite image of Super-Typhoon Usagi on September 20, 2013 at 11:32 UTC

Super-Typhoon Usagi warning graphic for September 20, 2013. Image credit: JTWC

Pagasa has issued warnings for more than 15 Philippine provinces and northern coastal villages are now evacuated. Authorities in Taiwan warned their southernmost areas of torrential rains and destructive winds.

According to National Meteorological Center of China, at 09:00 UTC (5 p.m. Beijing time), a previous yellow alert for the typhoon was replaced by the orange one, the second highest.

Hong Kong's observatory issued a warning and said Usagi poses a threat to Hong Kong on Sunday, September 22. The observatory's storm tracker showed the typhoon to be on a direct trajectory toward the city.

Latest JTWC warning issued at 15:00 UTC positioned Usagi near 20.3N and 123.2E. Super-Typhoon was located approximately 324 NM (600 km / 372 miles) south-southeast of Taipei, Taiwan, and has tracked west-northwestward at 09 knots (16.6 km/h) over the past six hours. Maximum significant wave height at 12:00 UTC was 14.6 meters (48 feet).

In this TRMM satellite flyover animation from September 19 rain was falling at a rate of over 140mm/~5.5 inches (red) per hour in the powerful storms within Super Typhoon Usagi's eye wall. Credit: NASA/SSAI, Hal Pierce

Featured image: NASA/TRMM


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