In the West, rain and snow showers in the northern Rockies and Pacific Northwest are boosting water supply prospects. Elsewhere, mostly sunny skies are promoting summer crop planting and emergence.

On the Plains, light rain and snow in Montana and North Dakota are hampering spring grain planting. Dry weather across the rest of the region is promoting fieldwork and winter wheat development.

In the Corn Belt, cool, unsettled weather across western and northern portions of the region is slowing fieldwork. Dry, warm weather elsewhere is favoring a rapid pace of summer crop planting and emergence.

In the South, dry weather is promoting flood-recovery efforts in portions of the Southeast, although rivers continue to rise in the northern Delta following recent excessive rainfall. Unfavorably dry conditions persist in the southern Delta, while scattered showers linger in central Florida.

Outlook: An area of low pressure along the U.S.-Canada border will produce showers in the Great Lakes and Ohio River Valley, while a mixture of rain and snow lingers in the Upper Midwest. Meanwhile, a developing storm over the Great Basin will shift into the central High Plains on Thursday, generating locally heavy snow across the north-central Rockies. As this system accelerates northeast, locally heavy showers will overspread the western Corn Belt, while rain and wet snow fall across the northern Plains and upper Mississippi Valley. Cold air surging south behind this system will introduce the threat of freezes to much of the Midwest at week’s end, although the intensity of the pending freeze – if any – remains uncertain. Dry, hot weather will prevail across much of the South before a cold front arrives on Friday. The NWS 6- to 10-day outlook for May 10-14 calls for above-normal temperatures across the south-central U.S., while near- to below-normal temperatures are expected elsewhere. Near- to above-normal rainfall is forecast for much of the Nation, with the highest likelihood of wetness in the middle Mississippi and Missouri Valleys. Drier-than-normal weather should be confined to Atlantic and Gulf Coast Regions.