The nation’s weather

Weather Underground Forecast for Wednesday, September 11, 2013.

Thunderstorms, with a slight chance of severe thunderstorms, will affect parts of the northern Midwest and Northeast on Wednesday, while showers and thunderstorms will continue to dampen the Southwest and Great Basin.

High pressure will continue to keep the majority of the West Coast warm and dry Wednesday, while parts of the Southwest and the Great Basin will experience thunderstorms and the possibility for flash floods. As a result of persistent thunderstorms, mountains, including local rivers and streams, will be susceptible to flooding. This region has been receiving significant rainfall for the past several days, which in turn has left grounds saturated. Thunderstorms may become stronger in the afternoon, so be cautious when driving as roads will be vulnerable to major flooding.

The Midwest can expect above average temperatures on Wednesday as high pressure will continue to dominate the region. Temperatures will range anywhere from the mid-80s to the lower 100s. Spotty thunderstorms may be possible along the central Midwest, while the northern Midwest may experience severe thunderstorms. Similar weather will be observed in the Northeast as strong thunderstorms may develop along the U.S. and Canadian border. Slightly cooler temperatures will persist in New England throughout Wednesday.

Florida and parts of Georgia may experience showers and thunderstorms on Wednesday, while temperatures will remain in the 80s and 90s throughout the bulk of the Southeast.

Temperatures in the Lower 48 states Tuesday have ranged from a morning low of 28 degrees at West Yellowstone, Mont. to a high of 99 degrees at Jonesboro, Ark.

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