In the West, very cool air continues to settle across the northern Rockies, Pacific Coast States, and the Great Basin. Freeze warnings are in effect this morning across the northern Great Basin and portions of the interior Northwest. Fieldwork continues under dry conditions from California into the Southwest, while showers are providing beneficial moisture in the northern Rockies and the Pacific Northwest.

On the Plains, small clusters of thunderstorms are developing in a few areas, including tornado-battered Moore, Oklahoma. The storms are forming in the vicinity of a warm front that separates cool air across the northern and central Plains from hot weather on the southern Plains. Drought continues to take a severe toll on rangeland, pastures, winter wheat, and emerging, rain-fed summer crops on the southern High Plains.

In the Corn Belt, very cool weather and scattered showers continue to limit a return to fieldwork. However, some producers have been able to resume planting corn and soybeans.

In the South, showers are primarily confined to the southern Mid-Atlantic region. West of the Appalachians, dry weather is promoting fieldwork, including previously delayed planting activities in the Mississippi Delta.

Outlook: Unusually cool air will continue to settle across the Midwest, where frost advisories have been issued for Friday morning for portions of northern and central Wisconsin and northern Lower Michigan. Cool conditions will also cover much of the West, but heat will build during the weekend across the High Plains. Early next week, warmth will expand to cover much of the remainder of the country, including the Plains, Midwest, and South. Meanwhile, the storm currently affecting the East will intensify during the weekend near the northern Atlantic Coast, resulting in as much as 2 to 4 inches of rain in New England. Showers and thunderstorms will become more numerous during the weekend and early next week across the Plains and western Corn Belt, but dry weather will prevail in the Southwest. The NWS 6- to 10-day outlook for May 28 – June 1 calls for above-normal temperatures from the Plains to the East Coast, while cooler-than-normal conditions will prevail in the West. Meanwhile, belownormal rainfall across most of the southern half of the U.S. will contrast with wetter-than-normal weather across the nation’s northern tier from the Pacific Northwest to the Great Lakes region.