Substantial rain may develop during the Memorial Day weekend in the western Corn Belt, including parts of Iowa and eastern Nebraska, according to the latest edition of the Drought Monitor published at the University of Nebraska-Lincoln.

The worst categories of drought continued to recede in Nebraska during the week that ended Tuesday morning, the report showed. 

Last week, records for the earliest triple-digit heat were set on May 14 in Grand Island (102), Omaha (101) and Lincoln (100). Days later, showers and thunderstorms engulfed the upper Midwest, leading to significant reductions in the coverage and intensity of lingering drought, Brad Rippey of the USDA wrote.

In Nebraska, moderate drought or worse prevailed in 97 percent of the state's area, unchanged from the previous week. But exceptional drought, the worst category, receded from 7.7 percent of the state to 6 percent. Extreme drought or worse receded from 70 percent to 60 percent and severe drought or worse receded from 92.8 percent to 89.1 percent of the state. 

The U.S. Drought Monitor is produced in partnership between the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture and the National Oceanic and Atmospheric Administration.