In the West, rain and high-elevation snow are providing a boost to reservoirs and mountain snow packs from California into Washington, although the cloudy, cool weather is slowing winter grain development.

On the Plains, scattered showers continue boost soil moisture for winter wheat but slow fieldwork across the central portions of the region. Warm, mostly dry conditions in northern Plains are promoting fieldwork and crop development.

In the Corn Belt, mostly dry, mild weather favors planting and early crop emergence, although showers in western growing areas are slowing fieldwork. Dryness is becoming an increasing concern, however, over the Upper Midwest and eastern Ohio Valley, where soil moisture is limited for crop establishment.

In the South, showers are easing short-term precipitation deficits in the Delta and interior Southeast, while dry, warm weather elsewhere is promoting corn, cotton, rice, and sorghum planting.

Outlook: An upper-air disturbance will produce showers across the Southeast and Mid-Atlantic, while a second disturbance triggers periods of rain from the central and southern Plains into the middle Mississippi River Valley. Meanwhile, a strong, slow-moving Pacific storm will generate locally heavy rain and mountain snow across much of the west, with precipitation from this system reaching the central Plains and western Corn Belt by Thursday. In contrast, high pressure will provide dry weather from the northern Plains into the northern and eastern Corn Belt, although rain associated with the Pacific storm will reach the Ohio Valley during the latter half of the week. The NWS 6- to 10-day outlook for April 25-29 calls for near- to below normal temperatures nation-wide, with the coolest conditions centered over the central and southern Great Plains. Drier-than-normal weather is expected from the northern Delta into the western Corn Belt, while above-normal precipitation occurs along the East Coast and from the Pacific Coast into the northern Plains.