Jeff co-founded the Weather Underground in 1995 while working on his Ph.D. He flew with the NOAA Hurricane Hunters from 1986-1990.
By: Dr. Jeff Masters , 3:52 PM GMT on September 27, 2009
Tropical Storm Ketsana dumped prodigious amounts of rain on the Philippine Islands Saturday, triggering flooding that killed at least 106 people and left 280,000 people homeless. The flooding was particularly bad in the capital of Manilla, where the 16.7 inches of rain that fell in just 12 hours set a record for the heaviest 1-day rainfall ever recorded in the city (previous record: 13.2 inches in 24 hours, set in June 1967). The flooding from Ketsana was the worst in at least 42 years in Manilla, and the streets of the entire city became submerged in knee to waist deep or higher flood waters. Local news video showed dramatic footage of flood victims being swept down a suburban river on a pile of debris. Ketsana is currently over the South China Sea, and is expected to intensify into a Category 1 typhoon before hitting Vietnam on Tuesday.
Figure 1. Rainfall from Tropical Storm Ketsana as estimated by NASA's TRMM satellite.
In the Atlantic, Tropical Depression Eight dissipated yesterday, and there are no threat areas to discuss today. The GFS model is forecasting development of a tropical depression off the coast of Africa in about seven days time.
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