Weather Underground National Forecast for Thursday, August 14, 2014

By: nationalsummary , 10:12 PM GMT on August 13, 2014

Weather Underground Forecast for Thursday, August 14, 2014

A low pressure system will inch eastward over the Intermountain West and the northern Plains on Thursday, while a separate low pressure system will move across the Northeast.

A strong area of low pressure will move eastward over the upper Intermountain West and the northern Plains. As this system interacts with monsoonal moisture, strong to severe thunderstorms will develop over the northwestern corner of the country. Severe thunderstorms will be possible over eastern Washington, northeast Oregon, Idaho and western Montana. These thunderstorms will be capable of producing large hail and dangerous straight line winds. In addition, heavy rain associated with these thunderstorms will bring a threat of flash flooding to Washington, northern Idaho and northwest Montana. Scattered showers and thunderstorms will also be possible across the Four Corners and the northern Plains due to a surge of monsoonal moisture from the south. Flash flooding will be possible over western Colorado on Thursday.

Meanwhile, a low pressure system will drift across the Northeast. This system will usher heavy rain and thunderstorms over New England, as flash flooding will be possible across northern Maine. A cold front associated with this system will extend several hundred miles east of the East Coast, while the tail end of this cold front will stretch across the Southeast. Warm, muggy air over the Gulf of Mexico will interact with this frontal boundary to trigger thunderstorm activity along the Gulf Coast and the Southeast. A separate cold front will move over the eastern Great Lakes and the Ohio Valley, pushing rainy weather over the region.

The views of the author are his/her own and do not necessarily represent the position of The Weather Company or its parent, IBM.

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