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Updated: 7:32 AM GMT on July 03, 2015
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Weather Underground Forecast for Friday, July 03, 2015

Stormy weather will affect the Deep South on Friday, while a ridge of high pressure will persist across the western states.

A stationary front will extend west southwestward from the Mid-Atlantic to the southern Plains. Warm, muggy air from the Gulf of Mexico will pool northward over this frontal boundary, producing widespread rain and thunderstorms across the southern Plains, the middle and lower Mississippi Valley, the Tennessee Valley, the southern Mid-Atlantic and the Southeast. The heaviest precipitation will focus over the Deep South. Heavy rain could lead to flash flooding over a handful of states, including eastern Oklahoma, Arkansas, southeast Missouri, northern Mississippi and Tennessee. Conditions will remain relatively calm across New England on Friday.

Meanwhile, a cold frontal boundary will dip south southeastward over the upper Midwest. This frontal boundary will initiate showers and thunderstorms over eastern North Dakota, northern Minnesota, northern Wisconsin and northern Michigan.

A ridge of high pressure will linger over the western half of the country. Temperatures will continue to range 10 to 20 degrees above normal across much of the Northwest. In addition, monsoonal moisture will aid in the development of showers and thunderstorms over the Sierra Nevada, the Great Basin and the Four Corners. These thunderstorms will likely fire up throughout the afternoon and evening, and will focus over favorable terrain.

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