Winter Weather Coverage

Storm Prediction Center Mesoscale Discussion 181

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Courtesy of NOAA/NWS/SPC

“Mesoscale Discussion 0181

NWS Storm Prediction Center Norman OK

1101 AM CDT Sat Mar 14 2020

Areas affected…east-central Illinois…central Indiana…west-central Ohio Concerning…Winter mixed precipitation

Valid 141601Z – 141800Z

SUMMARY…A narrow band of heavy snow and/or sleet has developed from east-central Illinois into west-central Ohio. It will likely continue into the early afternoon. DISCUSSION…Warm-air advection across the Midwest and Ohio Valley is occurring ahead of an upper-level shortwave trough. Isentropic lifting is resulting in precipitation across the region including snow and winter mixed preciptiation. Heavy precipitation rates and near/sub-freezing wet bulb temperatures have resulted in recent heavy snow and sleet reports from central Illinois into central Indiana. This narrow corridor at the nexus of the warm conveyor belt will continue to produce heavy snow/sleet for the next couple of hours before the stronger warm air advection wanes and moves eastward. Heavy snow/sleet may continue for longer into portions of west-central Ohio this afternoon.”

Storm Prediction Center Mesoscale Discussion 181

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