Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 349 AM EDT Thu Mar 29 2018 Valid 12Z Thu Mar 29 2018 - 12Z Sat Mar 31 2018 ...There is a slight risk of severe thunderstorms across parts of the Central Gulf Coast into parts of the Southeast... ...Heavy rain possible over parts of the Central Gulf Coast... ..Heavy snow possible across parts of the Upper Midwest... A complicated storm over the Lower/Middle Mississippi Valley will move northeastward to the Canadian Maritimes by Friday evening. Showers and thunderstorms will develop over parts of the Lower Mississippi Valley that will move off most of the Southeast Coast by Friday evening. Rain will also develop over parts of the Southern Plains/Middle Mississippi Valley into parts of the Tennessee/Ohio Valleys that will lift northward into the Lower Great Lakes/Northeast by Thursday evening. The rain will end over the Middle/Lower Mississippi Valley by Thursday evening, too. Overnight Thursday, the rain will move into the Mid-Atlantic and move off most of the Northeast Coast by Friday evening. Some rain will lingering over parts of the Ohio Valley into the Mid-Atlantic through Friday evening. Meanwhile, upper-level energy over the Northern Rockies will move eastward to the Northern/Central Plains by Thursday evening. The energy will aid in producing snow over parts of the Northern/Central Rockies through Thursday evening. In addition, a front over West-Central Canada will move southward into the Great Lakes westward to the Northern Rockies by Friday evening. The boundary will aid in producing snow over parts of the Upper Midwest Thursday afternoon into Friday evening. Additionally, onshore flow will aid in producing coastal rain over parts of the Pacific Northwest through Friday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php