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An area of low pressure has moved eastward over the Mid-Atlantic today. As this system interacted with a warm, muggy air mass, strong to severe thunderstorms developed over the region. Severe thunderstorm warnings were issued in southeast Virginia, while severe thunderstorm watches were issued in southern Maryland and northeast North Carolina. Marion, Virginia, reported a midday total of 1.75 inches of rain. Abingdon, Virginia, reported a midday total of 1.21 inches of rain. Scattered showers lingered over northern New England, while the remainder of the Northeast stayed clear of precipitation.

Meanwhile, an onshore flow from the Gulf of Mexico has pushed warm, humid air across the southern tier of the country. This air mass triggered isolated showers and thunderstorms across the southern Plains, the Gulf Coast and the Deep South. Severe thunderstorm warnings were issued along the Florida Panhandle, while excess heat warnings were issued over the coast of Texas. Coleman, Texas, reported a midday total of 2.51 inches of rain, while Florence Mem Airport, Arkansas, reported a midday total of 1.85 inches of rain.

A low pressure system has moved over the upper Mississippi Valley, which has brought strong to severe thunderstorms to the northern Plains and the upper Midwest. Severe thunderstorm warnings were issued in eastern North Dakota, while flash flood watches were issued in western North Dakota.

Monsoonal thunderstorms developed over parts of the Southwest, focusing over western Arizona, southeast California and southern Nevada. The West Coast stayed mostly clear of wet weather today.

MONDAY'S WEATHER EXTREMES:

HIGHEST TEMPERATURE (DEGREES F).........................108 Death Valley, California

HIGHEST HEAT INDEX (DEGREES F)..........................114 Immokalee, Florida

LOWEST TEMPERATURE (DEGREES F)..........................32 Truckee, California

LOWEST WIND CHILL (DEGREES F)...........................21 Mount Washington, New Hampshire

HIGHEST WIND GUST (MPH).................................56 Blackwell, Oklahoma

HIGHEST PRECIPITATION (INCHES)..........................2.51 Coleman, Texas

ON THIS DATE

It is not unusual for remnants of a tropical storm system to move over Southern California, bringing high humidity and possible lightning. On this date in 1906, however, an actual tropical storm moved up the Gulf of California, pouring 5.66 inches of rain on Needles, Callifornia. This rainfall amount is twice the city's annual average.

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