Weather Underground National Forecast for Thursday, June 19, 2014

Weather Underground Forecast for Thursday,June 19,2014



A cold frontal boundary will extend from the Four Corners to the northern Plains on Thursday, while a separate cold front will stretch from the upper Midwest to the Mid-Atlantic.

Active weather will continue to impact the nation’s midsection on Thursday. As warm, muggy air from the Gulf of Mexico collides with a cold front stretching from the Four Corners to the upper Mississippi Valley, strong to severe thunderstorms will develop across the Plains and the Mississippi Valley. Severe thunderstorms will be possible across parts of northern Texas, western Oklahoma, Kansas, eastern Nebraska, northwest Missouri, Iowa, eastern South Dakota, western Illinois and southwest Wisconsin. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. In addition, heavy rain associated with these thunderstorms could lead to flash flooding across the upper Mississippi Valley. An area of low pressure along the northern end of the frontal boundary will also usher scattered showers and thunderstorms across the Intermountain West.

Meanwhile, a separate cold front will extend across the upper Midwest, the Ohio Valley and the Mid-Atlantic on Thursday. As a result, a large cluster of rain and thunderstorms will push across the region. Scattered showers and isolated thunderstorms will also be possible across the Gulf Coast, the Tennessee Valley and the Southeast.

Out west, an onshore flow from the Atlantic will push rainy weather over the Pacific Northwest. High pressure over the eastern Pacific will keep the Southwest warm and dry on Thursday.