Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 342 AM EDT Mon Apr 27 2015 Valid 12Z Mon Apr 27 2015 - 12Z Wed Apr 29 2015 ...There is a slight risk of severe thunderstorms over parts of the Western Gulf Coast and the Lower Mississippi Valley... ...Heavy rain possible over parts of the Southern Plains and Central/Eastern Gulf Coast... ...Temperatures will be 15 to 30 degrees below average over parts of the Southern High Plains... A storm over the Southern Plains will move eastward along the Gulf Coast to Alabama by Tuesday evening. The system will produce showers and thunderstorms over parts of the Southern Plains/Western Gulf Coast and along the coast to Florida. The showers and thunderstorms will move eastward with the low to the Eastern Gulf Coast/Southeast by Tuesday evening. Rain will also develop over parts of the Southern High Plains that will likewise move eastward to the Tennessee Valley/Southeast by Tuesday. In addition, snow will develop over some of the higher elevations over the Central Rockies with rain at the lower elevations through late Monday night. A dissipating front over the Upper Midwest will aid in producing rain over parts of the Central High Plains into the Northern Plains that will move eastward to the Upper Mississippi Valley before ending on Tuesday morning. Additionally, upper-level closed low near the Northeast will aid in producing rain over parts of the Northeast through Tuesday evening. Elsewhere, a front over the Pacific will move eastward to the Pacific Northwest on Tuesday. The system will produce rain along parts of the Northwest Coast Tuesday through Tuesday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php