In the West, cool weather and isolated showers are mostly confined to the southern Rockies. Elsewhere, warm, dry weather is promoting fieldwork and summer crop maturation.

On the Plains, temperatures are rebounding to near- or above-normal levels in Texas, where several large wildfires continue to burn. Meanwhile on the northern Plains, a warm, dry weather regime favors crop maturation and fieldwork, including initial winter wheat planting efforts.

In the Corn Belt, scattered showers are affecting eastern areas, including parts of Indiana, Ohio, and Michigan. Elsewhere, sunny weather is promoting crop maturation and early-season corn harvesting. By September 4, the corn harvest was 11% complete in Missouri and 3% complete in Illinois.

In the South, locally heavy showers linger across Florida’s peninsula and the southern Mid-Atlantic coastal plain. Elsewhere, cool but dry weather favors summer crop maturation and harvesting.

Outlook: Heavy rainfall loosely associated with the remnants of Tropical Storm Lee will continue today from the Mid-Atlantic coastal plain into the Northeast. Significant flooding can be expected where heavy rain falls on soils already saturated in late August by Hurricane Irene. Elsewhere in the tropics, Hurricane Katia is turning away from the U.S. mainland, while Tropical Storm Nate—in the southern Gulf of Mexico—does not pose an immediate threat to the U.S. Meanwhile, warmth focused across the nation’s northern tier will gradually return to the remainder of the nation. Aside from lingering tropical showers in Florida and the Northeast, significant rainfall will be mostly limited to the Southwest and parts of the Intermountain West. The NWS 6- to 10-day outlook for September 13-17 calls for warmer-than-normal weather across the western half of the nation, while near- to below-normal temperatures will prevail from the Mississippi Valley to the East Coast. Meanwhile, above-normal rainfall in the East and parts of the Intermountain West will contrast with drier-than-normal conditions in the south-central U.S. and from the Pacific Northwest into the upper Midwest.