Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

Dangerous, prolonged heat is ongoing in the Mid-South to Mid-Mississippi Valley and heat expands into the Northeast for a brief period today. Widely scattered instances of flash flooding due to heavy rains are forecast from northeast Kansas to much of Indiana. Scattered strong to severe thunderstorms are possible across parts of New England, northern Mid-Atlantic, and North Dakota. Read More >


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Event Summary

During the afternoon and evening hours of August 9, a retreating outflow boundary triggered the development of multicell thunderstorms near the New Mexico and Texas state line. As this initial activity spread to the northeast, additional thunderstorms developed across the Central Texas Panhandle. A couple of storms exhibited supercell characteristics, particularly in Beaver County, Oklahoma where wind shear was stronger. As these storms moved across the Texas and Oklahoma Panhandles, they produced numerous reports of strong and damaging winds, especially in Gray County, Texas and Beaver County, Oklahoma. Unfortunately, there were also reports of wind damage near Pampa, TX and Forgan, OK. A damage assessment concluded that winds up to 120 mph were responsible for the damage in Beaver County and straight line winds up to 90 mph were responsible for the damage in Gray County.

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Heat Wave Expands to the East Coast; Flash Flooding Likely in the Central Plains into the Midwest; Severe Thunderstorms in the Northeast

August 9, 2011 Severe Storms