Weather

Much cooler days ahead for the Heartland

For the remainder of the week, a cold front will remain the focus for widespread, locally severe thunderstorms. The front, currently draped from the Great Lakes region to the southern Rockies, will continue to entrain tropical moisture, leading to event-total precipitation that could reach 2 to 4 inches in the southern Rockies and locally 1 to 2 inches from the southern Plains into the Northeast. During the weekend, the front will interact with warm, humid air over the Southeast, leading to another area of rain—1 to 3 inches or more. In contrast, dry weather will persist in the Pacific Coast States. A brief surge of cool air in the front’s wake will be quickly replaced late-season warmth. However, a strong surge of cool, Canadian air will reach the northern Plains and upper Midwest by September 9.

 

Looking ahead, the 6- to 10-day outlook calls for below-normal temperatures across the Rockies, Plains, and Midwest, while warmer-than-normal weather will be limited to Maine, the Deep South, the Pacific Coast States, and the Great Basin. Meanwhile, below-normal rainfall from the Pacific Northwest to the northern High Plains will contrast with wetter-than-normal conditions east of a line from Texas to Minnesota.

5-Day Precipitation Totals

NOAA’s 6- to 10- Day Outlook

NOAA’s 8- to 14- Day Outlook

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