NASA sees deadly typhoon usagi hit southern China

Sep 23, 2013 by Rob Gutro & Hal Pierce
On Saturday, Sept. 21, TRMM captured rainfall data on Typhoon Usagi as it passed between the northern Philippines and southern Taiwan. TRMM found rain falling at a rate of over 134 mm/hr (~5.2 inches) in USAGI's eye wall. Credit: SSAI/NASA, Hal Pierce

Southeastern China was hit by the most powerful typhoon of 2013 on Sept. 22, when Typhoon Usagi came ashore landfall in the Guangdong Province during the evening. NASA's TRMM satellite observed very heavy rainfall just south of the eye as the center was landfalling.

When Typhoon Usagi, the Japanese word for "rabbit," made landfall it had near 95.6 knots (~110 mph). According to Xinhuanet.com news, 25 people were killed by the . Over 310,000 residents were displaced due to the storm. Xinhuanet reported totaled as much as 7.1 billion yuan in Guangdong alone from Usagi.

On Sunday, Sept. 22, at 0900 UTC/5 a.m. EDT, Typhoon Usagi was closing in on the coast of southeastern China where it is poised to make landfall north of Hong Kong. Maximum sustained winds at that time were near 95 knots/109.3 mph/175.9 kph. At that time, the center of this large storm was near 22.6 north and 116.2 east, about 144 nautical miles/165.7 miles/266.7 km east of Hong Kong, but the effects of the storm were already being felt along the coast. Usagi was moving to west-northwest at 12 knots/13.8 mph/22.2 kph and generating very high, rough seas of up to 42 feet/12.8 meters. Coastal areas of southeastern China, and southwestern Taiwan experienced very rough surf as Usagi was making landfall.

Satellite data on Sept. 22 showed that Usagi's eye was about 10 nautical miles wide and beginning to cross the China coast. NASA's TRMM satellite passed overhead on Sept. 22 at 0923 UTC/5:23 a.m. EDT as the storm was making landfall, and TRMM saw very heavy rainfall in the southern quadrant of the storm. There were areas just south of Usagi's eye where rain was falling at a rate of over 169mm/~6.7 inches per hour along China's coast. TRMM radar sliced through Usagi and found that heights of some thunderstorms were reaching only about 12 km /7.4 miles but were returning values of over 54dBZ to TRMM's Precipitation Radar (PR) instrument.

On Sept. 22 at 0923 UTC/5:23 a.m. EDT, just south of Usagi's eye where rain was falling at a rate of over 169mm/~6.7 inches per hour along China's coast. TRMM radar sliced through Usagi and found that heights of some thunderstorms were reaching only about 12 km /7.4 miles. Credit: NASA/SSAI, Hal Pierce

According to CNN early (Eastern Daylight Time) on Sunday, Sept. 22, more than 80,000 people evacuated from the Fujian Province while evacuations also occurred in the Guangdong and Zhejiang provinces.

This video is not supported by your browser at this time.
This simulated 3-D flyby animation over Typhoon Usagi on Sept. 22 at 0923 UT showed heavy rain south of the center a rate of over 169mm/~6.7 inches per hour along China's coast. Cloud heights of some thunderstorms were reaching only about 12 km /7.4 miles. Credit: SSAI/NASA, Hal Pierce

Xinhuanet reported that about 8,490 houses collapsed and there was damage to about 50,800 hectares of cropland. As Usagi's remnants move over land the rugged terrain north of Hong Kong toward Guangzhou will cause it to dissipate within two days.

Explore further: Researchers construct a model of impact for El Nino / La Nina events

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