Monday, September 26, 2011

Tropical Storm Haitang Update #4

Haitang remains a weak tropical storm as it tracks across the South China Sea. The storm was last located approximately 200km southeast of Sanya in Hainan Province or about 280km east northeast of Da Nang, Vietnam. Haitang is moving westward at 10kph. Maximum sustained winds remain at 65kph gusting to 95kph.

VIS Image below shows the partially exposed circulation with the higher cloud tops displaced to the west and northwest due to strong wind shear in that region.

VIS Image from NRLMRY

This radar image from CMA shows the bands of moderate rain with pockets of thunderstorms affecting Southern Hainan. Expect rainfall amounts to range from 100 to 200mm tonight and into tomorrow.

The forecast remains generally the same. We are still expecting a landfall to occur sometime tomorrow afternoon (Vietnam Time), approximately 400km south of Hanoi. Haitang will then rapidly weaken as it tracks over land and should dissipate by as early as Wednesday over Laos. It remnants will continue to bring rain for parts of Indochina, however.

Personal Forecast (NOT OFFICIAL)

Issued (09 UTC) 5pm PhT 092611

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