In the West, isolated showers are mostly confined to the southern half of the region. In the Northwest, hot, dry weather continues to promote small grain harvesting and other fieldwork.

On the Plains, showers are generally limited to southernmost areas. On the southern High Plains, rain is especially beneficial for cotton and other immature summer crops. Meanwhile on the northern High Plains, warm, dry weather favors winter and spring wheat harvesting.

In the Corn Belt, showers and thunderstorms associated with a cold front stretch from the Great Lakes region southward into the middle Mississippi Valley. The recent Midwestern turn toward cooler, showery weather has generally come too late for corn but will benefit drought-stricken pastures and some soybeans.

In the South, beneficial showers are spreading across parts of the Mississippi Valley, including the northern Delta. Meanwhile in the Southeast, warm, dry weather favors fieldwork and summer crop maturation.

Outlook: A cold front currently crossing the Mid-South and Midwest will reach the Atlantic Seaboard by midweek. During the second half of the week, another cold front will follow a similar path across the Midwest and East. Showers and thunderstorms associated with the second front will develop across the upper Midwest on Wednesday and reach parts of the South and East by Friday. Five-day rainfall totals associated with the two cold fronts could reach 1 to 2 inches, with locally higher amounts, across the South, East, and lower Midwest. Locally heavy showers will also dot the Southwest, while hot, dry weather will prevail in the Northwest. Meanwhile, heat will briefly return to parts of the Midwest and East in advance of the second cold front. By week’s end, however, a cool weather pattern will become re-established in most areas from the Plains to the East Coast. The NWS 6- to 10-day outlook for August 18-22 calls for below-normal temperatures in most areas from the Plains eastward, except for lingering warmth along the Atlantic Seaboard. In contrast, hotter-than-normal conditions will prevail west of the Rockies, except along the Pacific Coast. Meanwhile, below-normal rainfall across the majority of the U.S. will contrast with wetter-than-normal weather in the Gulf and Atlantic Coast States.