Severe weather on tap for Upper Plains, Midwest

5:19 PM, Jul 21, 2013   |    comments
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Areas of active weather continued across the nation on Sunday as a frontal boundary extended across the Mid-Atlantic States through the central U.S. 

The front reached across the Central Plains and into the Northern High Plains during the afternoon. A wave of low pressure along the boundary in the Northern High Plains began to lift northeastward toward Canada, allowing the western half of the boundary to begin to lift northward as a warm front. 

Moisture streaming inland from the Gulf of Mexico and energy near this system stirred up scattered showers and thunderstorms from the Gulf Coast northward through the Eastern Valleys and the Mid-Atlantic into the Upper Great Lakes. As the wave of low pressure began to lift northeastward, severe storms became possible in parts of the Northern Plains. 

The Storm Prediction Center issued a slight risk of severe thunderstorms development across parts of central and eastern North Dakota into northwest Minnesota through the evening hours.

Meanwhile, in the West, showers and thunderstorms developed over parts of the Southwest and Southern California. Monsoonal moisture and daytime heating also aided in showers and thunderstorms over parts of Southern Rockies on Sunday.

SUNDAY'S WEATHER EXTREMES:

HIGHEST TEMPERATURE (DEGREES F).........................99 China Lake, Calif.

HIGHEST HEAT INDEX (DEGREES F)..........................112 Hugo, Okla.

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

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

HIGHEST WIND GUST (MPH).................................44 Copper Mountain, Colo.

HIGHEST PRECIPITATION (INCHES)..........................2.72 Bartlesville, Okla.

ON THIS DATE....... On this date in 1993, the Great Mississippi Flood crested at 46.9 feet in St. Louis, Mo. This crest easily broke the old record of 43.2 feet set in 1973. While the damage was still an astonishing $20 billion, the 11 mile long, 52 foot high flood wall protected the city center from sustaining even more damage.

The Associated Press

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