USDA's Joint Ag Weather Facility says in the Corn Belt, heavy showers and locally severe thunderstorms are sweeping across the upper Midwest. Elsewhere, very warm, humid weather accompanies widely scattered showers. Growing conditions remain favorable in most Midwestern areas, but drought persists in the eastern Corn Belt.
In the South, a low-pressure system lingers near the central Gulf Coast, maintaining the threat of heavy showers and flash flooding from southern Louisiana to western Florida. Hot, humid, mostly dry weather covers the remainder of the South. In the western Gulf Coast region, hot, dry weather favors fieldwork; in Texas, the rice harvest was 43% complete by August 7, USDA says.
On the Plains, cooler air is arriving in Montana and the Dakotas, following a cold front’s passage. Meanwhile in Texas, ongoing heat and diminishing soil moisture reserves are maintaining stress on rain-fed summer crops, USDA states.
In the West, USDA reports hot weather is returning to northern California and the Pacific Northwest. Meanwhile, an active monsoon circulation is helping to spark widespread Southwestern showers, especially in the southern Rockies.
In its outlook, USDA says the interaction between a Southern low-pressure system, the Southwestern monsoon circulation, and a cold front will maintain an active weather pattern in many areas. Five-day rainfall totals could reach 4 to 8 inches in the central Gulf Coast region and 2 to 6 inches from the southern Plains to New England. Midwestern rainfall totals of 2 to 4 inches can be expected, with higher amounts possible in the Ohio Valley. In contrast, little or no rain should occur in the southern Mid-Atlantic region and from the Pacific Coast to the northern Plains. Hot weather will return across much of the West and persist through the weekend in the eastern U.S., but cooler conditions will overspread the nation’s mid-section, USDA states.