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Updated: 3:32 PM GMT on May 27, 2015
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Weather Underground Forecast for Wednesday, May 27, 2015

An area of low pressure will move across the Great Lakes on Wednesday, while afternoon thunderstorms will persist over the Intermountain West.

A low pressure system will shift across the Great Lakes. This system will usher rain across parts of the upper Midwest on Wednesday. Meanwhile, an onshore flow from the Gulf of Mexico will drive warm, muggy air over the eastern third of the country. Widespread rain and thunderstorms will fire up across New England, the Mid-Atlantic, the Ohio Valley, the Tennessee Valley, the Southeast and the Deep South.

Out west, a pocket of energy over the Intermountain West will bring showers and afternoon thunderstorms to the Intermountain West and the Great Basin. This area of low pressure will eject across the northern Plains by the afternoon, fueling rain and thunderstorms over the region. A cold frontal boundary extending south southwestward over the middle Mississippi Valley, the central Plains and the southern Plains will aid in the production of strong to severe thunderstorms over the southern Plains. Severe thunderstorms will be possible over northern Texas, western Oklahoma, southeast Colorado and western Kansas. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. The West Coast will stay mostly clear of precipitation on Wednesday.

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