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Weather Underground Forecast for Sunday, August 02, 2015
A stationary front will linger over the Southeast on Sunday, while monsoonal thunderstorms can be expected across the Southwest.
A stationary front will stretch across the southern Mid-Atlantic, the Southeast and the Gulf Coast. This frontal boundary will continue to be the focal point for rain and thunderstorms. Flash flooding will be possible along the eastern Gulf Coast, specifically over northwest Florida. The majority of the southern Plains and the Deep South will experience warm, muggy conditions on Sunday.
Meanwhile, a trough of low pressure will dip southeastward over the upper Midwest. This system will usher in cooler air, aiding in the development of strong to severe thunderstorms. Severe thunderstorms will be possible in northeast Illinois, southeast Wisconsin, northern Indiana, Michigan and northwest Ohio. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. In addition, heavy rain could lead to flash flooding across northeast Illinois.
To the west, monsoonal moisture will interact with daytime heating, which will initiate showers and thunderstorms from the southern high Plains to the southern tier of the Pacific Northwest. There will continue to be flash flood threats over northern Texas and western Oklahoma. A ridge of high pressure over the eastern Pacific will bring above normal temperatures to the Northwest. Highs will jump into the 90s from northern California to interior Washington on Sunday.