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Severe Thunderstorms and Heavy Rainfall in the Ohio Valley and Great Lakes; Winter Weather in the Northern Tier

A slow moving front extending from the Great Lakes region into the Plains will bring snow, wintry mix, and ice accumulation north of the front from the Upper Midwest into New England, and severe weather and heavy rain south of the front. Scattered severe thunderstorms with damaging gusts, severe hail, and heavy rain are expected across parts of the Great Lakes/Midwest through tonight. Read More >

Overview

A strong cold front blasted through Central PA during the evening of the 11th, and early in the morning of the 12th of February, 2009. A squall line produced very high wind gusts as it moved through Western PA, but weakened as it moved into the Central Mountains. Then, the winds behind the front picked up and created a long duration of high sustained winds and gusts almost as strong as the squall line. These strong west winds lasted for 12 to 24 hours after the front moved past, peaking during the hours around sunrise on the 12th. Many locations had damage with trees and power lines going down.

 

Wind Gusts (mph) and Damage Locations 11-12 Feb 2009

 

Composite Radar Animation from the evening of 11 Feb 2009

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