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Weather Underground Forecast for Tuesday, July 07, 2015
A cold front will shift across the eastern half of the country on Tuesday, while above normal temperatures are forecast for the Northwest.
An extensive cold front will stretch southwestward across the Great Lakes, the Midwest, the middle Mississippi Valley and the southern Plains. Warm, muggy air will pool northward from the Gulf of Mexico. As this air mass collides with the aforementioned frontal boundary, heavy rain and thunderstorms will fire up across the southern and central Plains. Persistent heavy rain will bring threats of flash flooding to northern Texas, Oklahoma, southeast Kansas, northwest Arkansas, southern Missouri and southern Illinois. In addition, showers and thunderstorms will develop ahead of the frontal boundary over the Tennessee Valley, the Ohio Valley, the northern Mid-Atlantic and New England. High pressure will settle in over the northern Plains and the upper Midwest. Cooler temperatures will prevail across the region, and humidity levels are expected to drop.
Meanwhile, monsoonal moisture will spread across the western half of the country. This moisture will aid in the development of afternoon showers and thunderstorms over parts of the Intermountain West, the Great Basin, the Sierra Nevada and the southern Cascades. Temperatures will continue to range between the 90s and 100s over the interior Pacific Northwest. Additionally, high temperatures will reach the triple digits across the Desert Southwest on Tuesday.