Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 416 AM EDT Wed Apr 26 2017 Valid 12Z Wed Apr 26 2017 - 12Z Fri Apr 28 2017 ...There is a slight risk of severe thunderstorms over parts of the Lower/Middle Mississippi... ...There is an embedded moderate risk of severe thunderstorms over parts of Lower Mississippi Valley... ...Heavy snow for parts of the Northern/Central Rockies... ...Heavy rain possible from parts of Western Ohio Valley southwestward to the Lower Mississippi Valley... A front extending from the Upper Great Lakes/Upper Mississippi Valley southwestward to the Southern High Plains will move eastward to the Lower Great Lakes/Ohio Valley southward to Southeast/Tennessee Valley by Thursday evening. Showers and thunderstorms will develop along and ahead of the boundary from the Great Lakes to the Southern Plains/Western Gulf Coast that will advance slowly eastward to the Great Lakes/Ohio Valley to the Central/Southern Appalachians and parts of the Southeast by Thursday evening. Snow will also develop over parts of the Northern Plains and Upper Great Lakes/Upper Mississippi Valley through Thursday afternoon. In addition, rain/freezing rain will develop over parts of Northern Wisconsin and the Northwestern Upper Peninsula of Michigan through Thursday morning. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php