US Weather Outlook

Tropical Depression Gustav is centered over the Ozark Plateau and moving northeastward into southern Missouri, producing heavy rain and causing local flash flooding, USDA's Joint Ag Weather Facility reported Thursday. But generally, the rains are aiding latedeveloping summer crops - especially soybeans - in Missouri, Illinois, eastern Iowa and southern Wisconsin. Rain is also beginning to spread into parts of Indiana and Michigan. Elsewhere in the U.S.:

In the West, cool conditions linger across the Rockies, but hot weather is expanding from California into the Great Basin and the Southwest. The late-summer heat favors fieldwork and summer crop maturation.

On the Plains, cool, showery weather is slowing final spring wheat harvesting across northern areas. Meanwhile, rain associated with Tropical Depression Gustav is departing the east-central Plains. Across the remainder of the central and southern Plains, dry weather favors fieldwork and crop maturation.

In the South, a line of thundershowers stretches southward from Kentucky and Tennessee to the central Gulf Coast. In the wake of Gustav’s rainfall, which locally totaled 10 to 20 inches, lowland flooding continues in parts of Louisiana, Mississippi, and Arkansas. Producers continue to assess the effects of Gustav’s wind and rain on sugarcane, open-boll cotton, unharvested rice and sorghum, and other crops.

Near-term Outlook: The remnants of Gustav will lift northeastward and produce locally heavy showers in parts of the Midwest. Farther west, cool conditions will accompany developing showers on the Plains, while hot weather will expand across the West. In the tropics, Hanna will approach the Carolina coast by late Friday or early Saturday as a strong tropical storm or category 1 hurricane. During the weekend, rain and wind will spread northward through the middle and northern Atlantic Coast States.

Extended Outlook: The National Weather Service 6- to 10-day outlook for September 9-13 calls for above-normal rainfall across the southern half of the Plains, the Gulf and Atlantic Coast States, and the Great Lakes region, while drier-than-normal weather will prevail from northern California to the northern Plains. Meanwhile, above-normal temperatures in Florida and west of the Rockies will contrast with cooler-than-normal weather from the Plains to the Northeastern and Mid-Atlantic States.