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Rain to remain in northern Corn Belt

Agriculture.com Staff 07/21/2010 @ 11:00pm

Weather Market Commentary

Thursday, July 22, 2010

Thoughts presented in this report yesterday that the heaviest near-term rains in the Midwest would be shifting further north than where they had been so far this week has proven correct, as early morning radar on this Thursday showed widespread rainfall largely north of Interstate 80 in Nebraska and Iowa. Some of this rain has been heavy, with radar estimating that some localized rains in northwestern Iowa, northeastern Nebraska, and southeastern South Dakota have exceeded three inches. I can confirm actual rainfall totals (through 5 AM Central Time) of 2.32" at Spencer, 2.42" at Sioux City, 2.85" at Sioux Falls, 3.14 at Fort Dodge, and 3.75" at Yankton (with rain still falling at some of those spots at the time of this writing). Several counties in northwestern Iowa and northeastern Nebraska were under flash-flood warnings early today. Rains should continue to have a northerly bias in the Midwest in the near-term, whether it be from the rains associated with a warm front today or rains associated with a cool front moving through late tomorrow and during the early weekend. Much of Minnesota, northeastern Iowa, far northern Illinois, and most of Michigan and Wisconsin will likely see another 1-2 inches of rain from early today through a portion of Saturday, with heavier 2-4+ inch amounts for eastern Minnesota, extreme northeastern Iowa, and western Wisconsin. South and west of there we will see some 0.50-1.00" amounts, with lighter and more spotty rains south of Interstate 70. Areas south of the warm front over the next two days (which would include all but far northern parts of the Corn Belt) will be hot and steamy for today and tomorrow with temperatures in the 90s and dew point readings in the upper 70s to around 80 (creating heat index values near 110); heat advisories have been posted for southern Iowa and points southward. The middle of next week will probably feature another couple days with heat and humidity, but there is no indication that rain chances will stop (with rainfall in the 6-10 day time frame in the Midwest looking normal if not above normal).

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