According to the latest U.S. Drought Monitor, another round of blistering heat across the northern Plains further stressed rangeland, pastures, and a variety of summer crops. The central and southern Plains also experienced some hot weather, although agricultural impacts were tempered by mostly adequate soil moisture reserves. Meanwhile, mostly dry weather covered the Midwest, continuing a trend that had developed in mid-July. Short-term dryness was not yet a concern in the previously well-watered lower Midwest. However, reproductive corn and soybeans in drier areas of the upper Midwest were subjected to increasing levels of stress, especially as temperatures began to rise.
Mostly dry weather developed across the Midwest in mid-July and has persisted for nearly 2 weeks. However, dryness was not yet a concern across the lower Midwest, where the U.S. Department of Agriculture noted (on July 25) that topsoil was rated 15% or less very short to short in Missouri, Illinois, Indiana, Ohio, and Michigan. In fact, Michigan was one of the few states in the region—along with northern Wisconsin—to receive widespread heavy showers in recent days. In stark contrast, drought continued to worsen across parts of the upper Midwest, accompanied by building heat. By July 25, topsoil moisture was rated 81% very short to short in Minnesota, along with 53% in Iowa and 46% in Nebraska. Iowa’s number markedly increased from last week’s 33% very short to short. Drought expansion highlights included additional extreme drought (D3) coverage in Minnesota and an increase in severe drought (D2) coverage in Iowa. At least one-fifth of Minnesota’s major summer crops—21% of the corn and 20% of the soybeans—were rated in very poor to poor condition on July 25. Minnesota also led the Midwest on that date with 66% of its pastures rated very poor to poor.
Drought’s footprint remained rather limited across Kansas, eastern Colorado, and southern Nebraska. Farther north and west, however, worsening drought impacts were observed across much of Wyoming and the Dakotas. According to the U.S. Department of Agriculture, topsoil moisture on July 25 was rated 87% very short to short in North Dakota, along with 82% in South Dakota and 79% in Wyoming. Rangeland and pastures were rated at least 60% very poor to poor in Wyoming and the Dakotas, led by North Dakota at 85%. On July 25, North Dakota was the national leader in oats rated very poor to poor (56%), along with soybeans (41%) and corn (39%). South Dakota led the nation, among major production states, in sorghum rated very poor to poor (31%). Nationally, the U.S. spring wheat crop was rated just 9% good to excellent and 66% very poor to poor on July 25, the lowest overall condition at this time of year since July 25, 1988, when the crop was categorized as 4% good to excellent and 72% very poor to poor. Harvest was underway for drought-ravaged crops on the High Plains; 3% of the spring wheat had been cut by July 25. Periodic extreme heat on the northern Plains has greatly aggravated drought impacts. During the most recent heat wave, high temperatures in South Dakota on July 27 soared to 108°F in Pierre and 107°F in Rapid City. In the latter location, that represented the highest temperature since August 29, 2012.
National Drought Mitigation Center, University of Nebraska-Lincoln
Comments