Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 402 PM EDT Fri Apr 17 2015 Valid 00Z Sat Apr 18 2015 - 00Z Mon Apr 20 2015 ...There is a slight risk of severe thunderstorms over parts of the Southern Plains and Central High Plains... ...Heavy rain possible over parts of the Western/Central Gulf Coast... ...Snow over parts of the Central Rockies... A front over the Eastern Gulf Coast will move northward to the Tennessee Valley eastward to the Carolinas by Sunday. Showers and thunderstorms over the Southeast will slowly dissipate by Saturday evening. Showers and thunderstorms over parts of the Eastern Gulf Coast will transfer to parts of the Lower Mississippi Valley by Saturday morning that will lift northward to the Tennessee Valley/Ohio Valley and Southeast by Sunday. Meanwhile, closed upper-level low over the Central Rockies will slowly weaken as the low moves eastward to the Central Plains by Sunday. The energy will produce snow and lower elevation rain over parts of the Central Rockies through Saturday evening. In addition, showers and thunderstorms will develop over parts of Southern Plains into parts of the Central High Plains that will move eastward to the Lower/Middle Mississippi Valley by Saturday evening. A third front over the Pacific Northwest will move southeastward to the Upper Mississippi Valley to the Central Plains to parts of the Great Basin by Sunday. The system will produce rain over parts of the Northern Plains by Saturday afternoon that will move eastward to the Upper Mississippi Valley/Upper Great Lakes by Sunday morning. Elsewhere, low pressure over Central Ontario will move southeastward to the Gulf of Maine by Saturday evening. The storm will produce rain over parts of the Northern Appalachians/Northern New England later Saturday morning into Saturday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php