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Weather across the nation: 8/13/12

3:46 PM, Aug 13, 2012   |    comments
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Showers and thunderstorms developed across the Eastern Valleys and parts of the West on Monday.

A low pressure system moved over the Mississippi River Valley and pushed a cold front into the Eastern Valleys. Moisture poured in ahead of this system from the Gulf of Mexico, which produced widespread showers and thunderstorms from the Southeast through the Great Lakes.

Steady rain showers developed along the northern side of this front, while periods of heavy rainfall and strong thunderstorms developed across the Southeast. Some of these storms turned severe in the Tennessee Valley with reports of large hail and strong winds.

Hail up to 1 inch in diameter was reported in Samburg, Tenn., while gusts up to 60 mph were reported in Tiptonville, Tenn. Heaviest rainfall associated with this system was reported in Stuttgart, Ark., with a midday total of 2.24 inches of rain. Behind this activity, high pressure built over the Central U.S., allowing for dry and pleasant conditions.

However, in the Rockies, a weak trough of low pressure moved through the Intermountain West and into the Northern Rockies. This kicked up scattered showers and thunderstorms, with some isolated severe thunderstorms. Jordan, Mont., reported hail up to 1.5 inches in diameter and wind gusts up to 40 mph.

Just to the south, monsoonal moisture lingered over the Southwest and Rockies. This allowed for more widespread showers and thunderstorms to pop up across the Central and Southern Rockies, as well as the Great Basin. Severe thunderstorms were not anticipated in these areas.

MONDAY'S WEATHER EXTREMES:

HIGHEST TEMPERATURE (DEGREES F).........................114 Thermal, Calif.

HIGHEST HEAT INDEX (DEGREES F)..........................123 Beaufort, N.C.

LOWEST TEMPERATURE (DEGREES F)..........................32 Stanley, Idaho

LOWEST WIND CHILL (DEGREES F)...........................29 Stanley, Idaho

HIGHEST WIND GUST (MPH).................................58 Belleville, Ill.

HIGHEST PRECIPITATION (INCHES)..........................2.24 Stuttgart, Ark.

ON THIS DATE....... For as long as records had been kept, Stockton, Calif., had never recorded a drop of rain on this date. In 1991, however, the city recorded 0.05 inches of rain for the first rain since weather records started to be recorded in 1906.

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