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Harsh storms across the nation's eastern sector

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Posted: Tuesday, July 15, 2014 4:52 pm

A cold front stretched across the southern Plains, the lower Mississippi Valley, the Tennessee Valley, the Ohio Valley and the eastern Great Lakes on Tuesday, colliding with warm, humid air, strong to spawn severe thunderstorms across the eastern third of the country.

Severe thunderstorm warnings were issued across the southern Mid-Atlantic as severe unstable weather pounded the region. Darlington, South Carolina recorded wind speeds of 51 mph, while New River, North Carolina reported a midday total of 1.80 inches of rain.

Strong thunderstorms also brought heavy rain to the northern Mid-Atlantic and the New England. Flash flood warnings were issued in Connecticut and Massachusetts, while flash flood watches were draped across a handful of states. Danbury, Connecticut reported a midday total of 0.92 inches of rain. An onshore flow from the Gulf of Mexico pushed showers and thunderstorms over the Gulf Coast, while a low pressure system ushered showers over the upper Midwest.

Meanwhile, a flash flood warning was issued in southern Arizona as monsoonal thunderstorms lingered over the Southwest. Flash flood watches were also issued across northwest Arizona, Colorado, Utah, Nevada and northeast California. Monument Pass, Colorado reported a midday total of 0.73 inches of rain. High pressure kept the remainder of the West Coast mostly clear of precipitation.


—HIGHEST TEMPERATURE (DEGREES F).........................100 Gila Bend, Arizona

—HIGHEST HEAT INDEX (DEGREES F)..........................108 FENTRESS NALF, Virginia

—LOWEST TEMPERATURE (DEGREES F)..........................37 Custer, South Dakota

—LOWEST WIND CHILL (DEGREES F)...........................19 Barrow, Alaska

—HIGHEST WIND GUST (MPH).................................64 Indian Mountain, Alaska

—HIGHEST PRECIPITATION (INCHES)..........................1.80 New River, North Carolina


—In1995, a large family of thunderstorms known as a Mesoscale Convective System moved through much of eastern New York state and the Adirondack Mountains. The system produced a series of very strong downbursts, known as a derecho, along a path of 280 miles. The thunderstorms within the system rose to 70,000 feet and caused 3,000 lightning strikes per hour.

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