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Powerful Storm in the Western U.S.; Heavy Rain and Flooding Threat Across the Central Gulf Coast

A powerful storm system will continue to bring heavy mountain snow, rain, and high winds to the Pacific Northwest and northern California through midweek. Heavy rain and flash flooding potential exists across the central Gulf Coast over the next few days, including the Florida Panhandle. A Slight Risk (level 2 of 4) of excessive rainfall is in effect Tuesday. Read More >

Overview

Unseasonably warm and moist air over the region on Wednesday April 27th fueled severe thunderstorms. The thunderstorms occurred ahead of a cold front which would move through on Thursday morning. This was the same storm system responsible for the deadly outbreak of tornadoes across the Deep South that same evening and overnight. One tornado occurred in the evening of the 27th, and five more tornadoes occurred in Central PA after midnight in the early morning hours of April 28th, 2011. The strength of these tornadoes ranged from EF0 to EF2 on the Enhanced Fujita Scale.

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Map of Confirmed Central PA Tornadoes 
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