The nation’s weather

Weather Underground Forecast for Sunday, June 23, 2013.

A strong low pressure system will bring another round of heavy rain and severe thunderstorms to the Upper Midwest on Sunday. The system will move northeastward from the Northern Plains, pushing a warm front eastward over the Upper Midwest and Great Lakes, while a cold front extends southward from this system through the Central Plains. Counter-clockwise flow around this system will continue pulling abundant moisture northward from the Gulf of Mexico, feeding moisture and energy in from the south. This will allow for more showers and thunderstorms to develop across the Plains and Midwest, with a chance of severe thunderstorm development from northwestern Colorado through Minnesota and Wisconsin. This system has a history of producing large hail, damaging winds, and periods of heavy rainfall.

In the Southeast, expect a few more scattered showers and thunderstorms to pop up from Florida through the Carolinas as a frontal boundary slowly moves eastward and away from the region. Severe storms are not anticipated in these areas on Sunday.

Out West, unseasonable rain will move into the Pacific Northwest and northern California on Sunday and last through early next week as a low pressure system moves onshore and pushes a strong cold front onshore with it. This broad system will produce cloudy skies with periods of heavy rain and strong winds across the West Coast, Great Basin, and Intermountain west for the next few days.

Temperatures in the Lower 48 states Saturday have ranged from a morning low of 26 degrees at West Yellowstone, Mont. to a high of 102 degrees at Artesia, N.M.

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