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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

A devastating severe weather event struck Northern and Central Pennsylvania during the afternoon of July 21, 2003. The worst damage occurred over the Northern Pennsylvania Counties of McKean and Potter. Below are some preliminary images showing the damage, and two radar loops from the State College National Weather Service Doppler Radar. A more formal assessment of this event is underway. The Text of the Preliminary Storm Damage Survey Reports (issued as "Public Information Statements") from that day's more significant areas of damage follow after the picture links. A second day of severe weather followed on the 22nd, producing very large hail, and a weak tornado a few miles north of Harrisburg in Dauphin County. This Storm Damage Survey Report (and links to a few pictures of the damage) are also included here.

A second day of severe weather followed on the 22nd, producing very large hail, and a weak tornado a few miles north of Harrisburg in Dauphin County. This Storm Damage Survey Report (and links to a few pictures of the damage) are also included here.

Image Image Image
Loop of Radar Reflectivity of the storms in progress as they swept across McKean and Potter counties. This loop ranges from 2:00 PM to 5:00 PM. Loop of Storm Relative Velocity of the storms in progress as they swept across McKean and Potter counties. This loop ranges from 2:00 PM to 5:00 PM. Green colors show wind flow towards the radar (located to the south of these images) and red colors show wind flow away from the radar. Landsville Tornado Daamge
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