US Air Quality

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Updated: 1:00 AM GMT on October 01, 2014
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Weather Summary

Weather Underground Forecast for Tuesday, September 30, 2014

A low pressure system will move across the Plains on Tuesday, while a coastal system will affect the Southeast.

An area of low pressure will deepen as it lifts northeastward over the western high Plains. As this system interacts with warm, muggy air over the nation’s midsection, strong to severe thunderstorms will develop over the upper Midwest, the northern Plains, the central Plains and the southern Plains. Severe thunderstorms will be possible over southeast South Dakota, northeast Nebraska, northwest Iowa and southwest Minnesota. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. In addition, showers will linger over the Rockies. Light snow accumulations will be possible above 8,000 feet. The tail end of a cold front will also bring rainy weather the Pacific Northwest, while the Southwest will stay mostly clear of precipitation on Tuesday.

Meanwhile, a low pressure system will move eastward over the northeast coast of Florida. This system will bring heavy rain and thunderstorms to portions of Florida, Georgia and the Carolinas. Scattered showers and thunderstorms will also develop along the Gulf Coast due to an onshore flow from the Gulf of Mexico. To the north, a weaker low pressure system will carry light to moderate rain across the Ohio Valley, the eastern Great Lakes, the northern Mid-Atlantic and New England on Tuesday.

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