Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 356 AM EDT Sat Mar 25 2017 Valid 12Z Sat Mar 25 2017 - 12Z Mon Mar 27 2017 ...There is a slight risk of severe thunderstorm over parts of the Lower/Middle Mississippi Valley/Central Gulf Coast/Tennessee Valley... ...Heavy rain possible over parts of the Tennessee Valley/Southern Appalachians... ...Rain/freezing rain possible over parts of the Upper Great Lakes and the Northeast... An upper-level low over the Central/Southern Plains and Middle/Lower Mississippi Valley will move northeastward to parts of the Ohio Valley/Great Lakes while weakening by Sunday. Moisture from the Gulf of Mexico will stream northward into the Ohio Valley and pool along the associated stationary front into the Mid-Atlantic. Showers and thunderstorms will develop along and ahead of the cold front over the Middle/Lower Mississippi Valley that will move eastward to the Eastern Ohio Valley/Eastern Gulf Coast by Sunday. Rain will develop over parts of the Central Plains into the Great Lakes/Ohio Valley and the Northeast through Sunday. The rain will end over parts of the Central Plains by Saturday evening. As the rain moves into parts of the Northeast and Upper Great Lakes, rain/freezing rain will develop over parts of the areas Saturday night into Sunday evening. Meanwhile, an upper-level trough over the West Coast will move eastward to the Plains by Sunday evening. The system will produce rain and higher elevation snow over parts of the Pacific Northwest/California eastward to parts of the Northern Rockies/Great Basin will move into parts of the Central/Southern Rockies and the Northern High Plains by Sunday morning. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php