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Updated: 6:00 AM GMT on July 26, 2014
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Weather Underground Forecast for Saturday, July 26, 2014

A cold front will extend from the central Plains to the upper Midwest, while monsoonal thunderstorms will affect the Southwest.

A cold front is forecast to stretch across the central Plains and the upper Midwest on Saturday. A low pressure system along the eastern end of the frontal boundary will interact with warm, humid air to initiate widespread rain and thunderstorms. Severe thunderstorms will be possible over southeast Nebraska, northeast Kansas, southern Iowa, Missouri, Illinois, Indiana, Ohio, northern Kentucky, northwest West Virginia, western Pennsylvania and western New York. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. In addition, heavy rain associated with these thunderstorm could lead to flash flooding across Illinois, Indiana, southwest Ohio and northeast Kentucky. Disorganized showers and thunderstorms will also be possible across upper Mississippi Valley, the Tennessee Valley, the northern Mid-Atlantic and the Northeast. To the south, an onshore flow from the Gulf of Mexico will fuel isolated showers and thunderstorms over the Gulf Coast, the Southeast and the southern Mid-Atlantic.

Monsoonal thunderstorms will continue to develop across the Four Corners and the Southwest on Saturday. These thunderstorms will bring a chance of flash flooding to valleys adjacent to sloped terrain. High pressure will keep the majority of the West Coast clear of precipitation.

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