The nation’s weather

Weather Underground Forecast for Monday, July 25, 2016

A ridge of high pressure will continue to build over the southern tier of the country on Monday, while a frontal system transitions across the Northeast.

A expansive ridge of high pressure will build from the Southwest to the Southeast. This high pressure system will keep hot conditions in place over the southern tier of the country, although temperatures will return to near normal for late July standards. Monsoonal moisture and daytime heating will trigger isolated showers and thunderstorms across the Four Corners. A deep plume of moisture will move onshore over the southern Plains and the Deep South. Moisture from the Gulf of Mexico and daytime heating will trigger thunderstorms from the southern and central Plains to the Southeast. Most storms will fire up during the afternoon and evening.

Meanwhile, a cold frontal boundary will stretch southwestward from the eastern Great Lakes to the central Plains. As this frontal boundary transitions eastward, it will generate showers and thunderstorms across New England, the northern Mid-Atlantic, the Ohio Valley and the middle Mississippi Valley.

Most of the Northwest and the West Coast will stay clear of precipitation on Monday. The exception to this will be over the northern Cascades, as isolated showers and thunderstorms will be possible.

Temperatures in the Lower 48 states Sunday have ranged from a morning low of 32 degrees at West Yellowstone, Mont. to a high of 105 degrees at Enid, Okla.

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