Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EDT Mon Apr 13 2020 Valid 12Z Mon Apr 13 2020 - 12Z Wed Apr 15 2020 ...There is a slight to enhanced risk of severe thunderstorms along most of the East Coast... ...Heavy snow over the Upper Peninsula of Michigan will wind down... ...Temperatures will be 10 to 30 degrees below average from the Rockies eastward to the Great Lakes/Ohio/Tennessee Valleys and Central Gulf Coast... A strong storm over the Great Lakes will move northeastward into Southeastern Canada by Monday evening, causing a variety of weather hazards. On the east side of the storm, widespread thunderstorms are likely, the unstable atmosphere is expected to produce severe thunderstorms from the Northern Mid-Atlantic southward along the East Coast to Northern Florida. The hazards expected are Tornadoes, hail, and high winds. Rain will be a secondary hazard with the WPC issuing a marginal risk of excessive rainfall over of the Northeast where isolated flash flooding is possible. To the north and west of the track of the surface lows, cold temperatures will support snow continuing across portions of the Upper Peninsula of Michigan through Monday evening, and Winter Weather Advisories are in effect over portions of the Upper Peninsula of Michigan into parts of Wisconsin and Southeast Minnesota. In addition, widespread Wind Advisories are in place across the eastern half of the U.S., from Middle Mississippi Valley/Great Lakes eastward to the Northeast/Mid-Atlantic Coast. In the wake of the storm, cold high pressure will build in from the Northern/Central Rockies to the plains aiding in producing a large temperature drops across the Mississippi, Ohio, and Tennessee Valleys on Monday. Freeze Warnings are in place for parts of the Southern/Central Plains to the Middle Mississippi Valley. In contrast, very warm Monday across the East, which could set widespread record high low temperatures, will give way to much cooler temperatures on Tuesday in the Mid-Atlantic and Northeast. Meanwhile, Florida remains south of the cold front and could have record-breaking heat from Monday into Wednesday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php