In the West, showers are confined to southern areas. Elsewhere, hot, dry weather favors fieldwork, including early-season winter wheat planting. By September 2, winter wheat planting was 13% complete in Washington.
On the Plains, hot weather persists across southern portions of the region, where high temperatures will again surpass the 100-degree mark. Meanwhile, favorably cooler weather prevails across the northern and central Plains, although dry conditions are maintaining severe stress on rangeland and pastures. In addition, winter wheat planting is underway in a few areas, including Nebraska (1% seeded by September 2), meaning that soaking rainfall will soon be needed to ensure proper crop emergence and establishment.
In the Corn Belt, a broken line of showers stretches from upper Great Lakes region into the middle Mississippi Valley. The rain is too late for summer crops but is helping to replenish drought-depleted soil moisture. In advance of the shower activity, hot weather prevails across the southern and eastern Corn Belt.
In the South, a low-pressure system near the central Gulf Coast is producing heavy showers. A post-Isaac report from southern Louisiana indicates lodging of sugarcane. Less than half (45%) of the state’s sugarcane was rated good to excellent on September 2, down from 77% the previous week. Sugarcane rated very poor to poor climbed from 2 to 30% during the same period. Elsewhere, hot weather prevails in the Mid-South and the lower Mississippi Valley, where today’s temperatures will approach, reach, or exceed 100°F.
Outlook: A series of cold fronts will produce showers from the central and southern Plains into the Ohio Valley and much of the East. Five-day amounts of 1 to 2 inches will be common, except for some higher totals in New England and the lower Southeast. Only light showers can be expected across the northern Plains and upper Midwest. The fronts will result in a cooling trend across the Plains and Midwest, with below-normal temperatures expected in both regions by week’s end. The NWS 6- to 10-day outlook for September 10-14 calls for near- to above-normal temperatures nationwide, except for cooler-than-normal conditions in the Southeast and along the Pacific Coast. Meanwhile, near- to below-normal rainfall across the majority of the U.S. will contrast with wetterthan- normal weather in the southern Rockies.