Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 358 AM EDT Wed Apr 01 2015 Valid 12Z Wed Apr 01 2015 - 12Z Fri Apr 03 2015 ...There is a slight risk of severe thunderstorms over parts of the Central Plains/Middle Missouri Valley... ...Heavy rain possible over parts of the Central Plains/Middle Mississippi Valley and the Ohio Valley... ...Temperatures will be 10 to 20 degrees above average for parts of the Upper Midwest into the Southern High Plains... A storm over the Northern Plains will move Northeastward into Ontario by Thursday evening. The system will produce light rain over parts of the Upper Great Lakes along with rain/snow over parts of the Central Rockies on Wednesday morning. Moisture from the Gulf of Mexico will interest the associated front over parts of the Upper Mississippi Valley/Central Plains on Wednesday afternoon producing showers and thunderstorms with moderate rain. The area of showers and thunderstorms will move southeastward and expand into Middle Mississippi Valley and the Ohio Valley by Thursday. Rain will also develop over parts of the Upper Great Lakes that will move into the Lower Great Lakes and parts of the Northeast while intensifying to light to moderate rain by Thursday evening. Light rain will also move into parts of the Central/Northern Appalachians. In addition, upper-level energy over the Southern Plains will move northeastward to the Central Appalachians by Thursday. The energy will produce showers and thunderstorms over parts of the Southern Plains/Lower Mississippi Valley into parts of the Southeast on Wednesday. The showers and thunderstorms will taper off to an area over Eastern Texas by Thursday morning. Additionally, upper-level energy moving onshore over the West Coast will move inland to the Central Rockies/Great Basin by Thursday evening. The disturbance will produce rain along the Pacific Northwest Coast through late Wednesday night. Snow will also develop over parts of the higher elevations of the Northwest and the Northern Rockies through Thursday morning. Snow will develop over parts of the Central Rockies/Great Basin on Thursday morning, expanding into parts of the Northern Rockies by Thursday evening. An area of moderate snow will develop over parts of the Central Rockies by Thursday evening, too. Light to moderate rain will develop over parts of the Central High Plains by Thursday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php