Weather Underground National Forecast for Wednesday, June 18, 2014

By: nationalsummary , 7:49 AM GMT on June 18, 2014

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Weather Underground Forecast for Wednesday, June 18, 2014

A cold front will extend from the Southwest to the central Plains on Wednesday, while a separate cold front will stretch from the upper Midwest to the Northeast.

An area of low pressure will deepen over the central Plains on Wednesday. As warm, muggy air from the Gulf of Mexico interacts with this system, widespread showers and thunderstorms will develop across the nation’s midsection. A cluster of severe thunderstorms will be possible from northern Texas to North Dakota, and as far east as Michigan. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. In addition, heavy rain associated with these thunderstorms will bring a chance of flash flooding to North Dakota, eastern South Dakota, eastern Nebraska, Minnesota, northern Iowa, southwest Wisconsin and northern Illinois. Scattered showers and thunderstorms will also be possible across the Intermountain West, which will bring a threat of flash flooding to northwest Montana.

A separate area of low pressure will move eastward across the Great Lakes on Wednesday. Severe thunderstorms are forecast to impact the Ohio Valley and the northern Mid-Atlantic. Flash flooding will be possible over southeast Michigan, northeast Ohio, Pennsylvania and New Jersey. Rain and thunderstorms are also expected to push across the Northeast.

Isolated showers and thunderstorms will continue to pop up along the Gulf Coast and the Southeast on Wednesday. There will be a threat of flash flooding over southwest Florida as heavy rain is expected to move across the state. The southern Mid-Atlantic will stay clear of wet weather.



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This is the blog for the United States' national forecast. These summaries are by Weather Underground forecasters and are updated twice each day.

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