Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Fri Mar 31 2023 Valid 00Z Sat Apr 01 2023 - 00Z Mon Apr 03 2023 ...A major severe weather outbreak is forecast to continue into tonight across portions of the Mississippi Valley... ...Winter Storm with Blizzard conditions from Northern Plains to Upper Midwest/Great Lakes tonight... ...Heavy snow across northwestern mountains... ...Critical Fire Weather persists over parts of the Central/Southern Plains for the next several days... A deep upper-level trough will continue to trigger severe weather and excessive rainfall across the Mississippi/Tennessee Valleys from Iowa to eastern Texas tonight. The Storm Prediction Center recently issued a High Risk of Severe Thunderstorms over portions of southeast Iowa, west-central Illinois, far northeastern Missouri, and in parts of eastern Arkansas, northern Mississippi and southwestern Tennessee. A few long-track strong to potentially violent tornadoes are probable, particularly over portions of the Mid-Mississippi Valley to Mid-South. Damaging wind gusts and very large hail are expected as well. People in these areas should remain vigilant and prepared to take emergency precautions if necessary. Conditions should improve later tonight when the line of convection moves into the Tennessee/Ohio Valley and Southeast. Some thunderstorms produce heavy rainfall leading to flash flooding as depicted by a Slight Risk area. Showers and thunderstorms will move into the Eastern third of the country on Saturday. A Slight Risk of Severe Thunderstorms is in effect for parts of the Northeast, Delaware and the Southeast where damaging winds will be the main physical weather concern. There's a Marginal risk of flash flooding in the Southeast on Saturday. Simultaneously, a winter storm will dump heavy snow, strong winds and blizzard conditions from southern Minnesota, northern Wisconsin and the Upper Peninsula of Michigan tonight. Between 6-12 inches of snow is expected with a quarter to half inch of sleet and some freezing rain possible in the transition zones. Kebede Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php