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Across the Corn Belt, another surge of cool air is slowing the push of late-planted corn and soybeans toward maturation. In many upper Midwestern locations, Friday morning’s low temperatures fell below 50°. Elsewhere, rain is largely confined to Missouri, where overnight thunderstorms resulted in local flooding across western sections of the state.

On the Plains, overnight thunderstorms dumped heavy rain in parts of Kansas and Oklahoma; flash flooding continues in areas where the highest totals occurred. Meanwhile, hot weather is returning across Texas, following a brief respite. Elsewhere, cool weather prevails across the northern half of the region, with scattered showers slowing small grain harvest activities on the northern High Plains.

In the South, humid, showery weather persists across Florida’s peninsula. Meanwhile, Friday, early-morning thunderstorms are overspreading the Ozark Plateau. Elsewhere, warm, dry weather favors crop maturation and late-summer fieldwork, including rice and corn harvesting.

In the West, very hot, dry weather prevails at most interior locations. An excessive heat warning is in effect in the Desert Southwest, where high temperatures will again exceed 110° at low-elevation sites.

Hurricane Dorian is forecast to further intensify and approach Florida’s east coast during the Labor Day weekend. Although Dorian is expected to reach Florida as a major hurricane, there is still uncertainty regarding the timing and exact location of landfall. Current forecasts project Dorian’s eye to cross Florida’s coastline on Monday or Tuesday, with the storm’s forward motion slowing prior to landfall. Regardless of exact storm track and intensity, the southern Atlantic region will need to brace for the potential for a prolonged period of high winds and inundating rainfall, as well as a coastal storm surge. Meanwhile, most of the remainder of the country will experience several days of relatively tranquil weather, although occasional showers and thunderstorms will occur along an axis from the southern Rockies into the Midwest and Northeast. Late-season heat in the West will gradually expand eastward, reaching the Plains during the weekend and briefly affecting the Midwest and much of the East early next week.

Looking ahead, the 6- to 10-day outlook calls for the likelihood of below-normal temperatures from the Midwest into New England, while warmer-than-normal weather will cover the remainder of the country—especially in the southern and western U.S. Meanwhile, near- or above-normal rainfall across much of the nation should contrast with drier-than-normal conditions in the Pacific Northwest and from the Rio Grande Valley into the middle and lower Mississippi Valley.

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Greg Soulje, a professional meteorologist since 1985, offers national agricultural weather forecasts via "This Week in Agribusiness."