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The nation’s weather

July 8, 2015

Weather Underground Forecast for Wednesday, July 08, 2015

A cold front will extend from the Northeast to the southern Plains on Wednesday, while monsoonal thunderstorms will persist across the western half of the country.

An extensive cold front will stretch across the Northeast, the Ohio Valley, the middle Mississippi Valley and the southern Plains. As this frontal boundary transitions east southeastward, it will collide with warm, muggy air pooling northward from the Gulf of Mexico. This interaction will generate heavy rain and thunderstorms over the southern and central Plains, as well as the Midwest. Heavy rain will bring threats of flash flooding to several states, including northeast Texas, eastern Oklahoma, northwest Arkansas, Missouri, southern Illinois and southwest Indiana. Disorganized showers and thunderstorms will also develop across the Tennessee Valley, the Ohio Valley, the Mid-Atlantic and the Northeast. High pressure will keep conditions quiet across the upper Midwest and the Great Lakes on Wednesday.

Meanwhile, monsoonal moisture will continue to spread over the Intermountain West and the Great Basin. Showers and thunderstorms will be possible across the Four Corners, the northern Rockies, the Great Basin and the Sierra Nevada. These thunderstorms will focus over favorable terrain, and will be driven by daytime heating. Temperatures will range between the 80s and 90s over the Pacific Northwest. In addition, temperatures will spike into the triple digits across the Desert Southwest.

Temperatures in the Lower 48 states Tuesday have ranged from a morning low of 37 degrees at International Falls, Minn. to a high of 102 degrees at Blythe, Calif.

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