Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 426 AM EDT Sat Apr 30 2016 Valid 12Z Sat Apr 30 2016 - 12Z Mon May 02 2016 ...Severe thunderstorms possible over parts of the Lower/Middle Mississippi Valley and Tennessee Valley/Central Gulf Coast... ...Heavy rain possible over the Lower Mississippi Valley... ...Heavy rain possible over parts of the Central Appalachians... ...Snow over parts of the Central Rockies and Central High Plains... A strong storm over the Central Plains/Middle Mississippi Valley will slowly move eastward to the Ohio Valley by Sunday evening. Showers and thunderstorms will develop along and ahead of the associated front from parts of the Lower/Middle Mississippi Valley and the Western Gulf Coast that will move to the Great Lakes/Ohio Valley and Central/Southern Appalachians, while extending southwestward to the Lower Mississippi Valley by Sunday morning. The showers and thunderstorms will expand into parts of the Southern Mid-Atlantic/Southeast by Sunday evening. Rain and higher elevation snow will develop over parts of the Central Rockies and Central High Plains through Sunday morning. In addition, rain will develop over parts of the Central High Plains eastward to parts of the Western Ohio Valley on Saturday morning that will expand into parts of the Upper Great Lakes and parts of the Northeast/Northern Mid-Atlantic by Sunday morning. Rain will continue over parts of the Central High Plains/Central Plains through Sunday afternoon. Similarly, rain will continue over parts of the Middle Mississippi Valley/Western Ohio Valley through Sunday evening. Meanwhile, upper-level energy will settle into parts of the Great Basin/Southwest and expand eastward to parts of the Southern High Plains by Sunday evening. The system will produce rain over parts of the Northern Intermountain Region southward to parts of Central/Southern California and the Southwest by Saturday morning. Rain with embedded thunderstorms will develop over parts of the Northern Intermountain Region southward to parts of the Southwest and expand into parts of the Southern Rockies by Saturday evening. The rain and embedded thunderstorms will end over the Northern Intermountain Region/Great Basin by Sunday morning. On Sunday morning rain will continue over parts of the Southwest/Southern Rockies. Rain and higher elevation snow will develop over parts of the Central Rockies/Central High Plains on Sunday morning into Sunday evening. By Sunday evening, rain with embedded thunderstorms will develop over parts of Central/Southern California and extend eastward to parts of the Southern High Plains. Also on Sunday, moisture from the Gulf of Mexico will move westward over the Western Gulf Coast into parts of Western Texas producing showers and thunderstorms over the region. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php