In the West, showers are becoming more scattered and less organized in the Four Corners States. Meanwhile in the Northwest, a continuation of warm, dry weather favors winter wheat planting and other fieldwork.

On the Plains, a freeze has ended the growing season in North Dakota and eastern South Dakota, threatening immature crops such as corn and soybeans. Meanwhile, highly beneficial showers are falling on the central and southern High Plains. The showers are providing topsoil moisture for winter wheat planting preparations, but much more rain is needed on the southern High Plains to overcome the effects of a historic, year-long drought.

In the Corn Belt, a freeze has ended the growing season in portions of Minnesota, Wisconsin, northern Iowa, and the eastern Dakotas. Producers are monitoring fields of immature corn and soybeans for indications of freeze damage. Farther east, showers are gradually ending across the Ohio Valley.

In the South, warmth lingers across the southern Atlantic States, but cool air is overspreading the remainder of the region. Nevertheless, mostly dry weather continues to promote summer crop maturation and harvesting.

Outlook: The worst of the Midwestern cold snap is over, although widespread frost will affect parts of the Great Lakes region (e.g. Wisconsin and Michigan) on Friday morning. In addition, frosty conditions will prevail during the weekend across the interior Northeast. During the next several days, Midwestern producers will continue to monitor corn and soybeans for signs of freeze damage. Across the northern Corn Belt, approximately one-third of the corn had not yet begun to dent and more than half of the soybean leaves had not begun to turn yellow, and thus were vulnerable to injury due to an early freeze. Farther south, rainfall totals could reach 1 to 2 inches from the central and southern Plains into the Mid-South. By early next week, mild weather will return to the Plains and quickly expand to cover much of the U.S. Cool weather will linger, however, in the Great Lakes and Northeastern States. The NWS 6- to 10-day outlook for September 20-24 calls for near- to above-normal temperatures and near-to below-normal temperatures across most of the nation. Cool weather will be limited to the Southeast, while wet conditions will be confined to the Pacific Northwest, the lower Great Lakes region, and the Northeast.