Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 AM EDT Thu Mar 31 2016 Valid 12Z Thu Mar 31 2016 - 12Z Sat Apr 02 2016 ...There is a slight risk of severe thunderstorms from the Central Gulf Coast to the Western Ohio Valley... ...Heavy rain possible over the Southeast, Central Gulf Coast, and Tennessee Valley... ...Light snow over parts of the Upper Great Lakes/Upper Mississippi Valley and Central Rockies... A front extending from the Great Lakes to the Southern Plains will slowly move to the East Coast by Friday evening. Showers and thunderstorms will develop along and ahead of the boundary from the Western Ohio Valley to the Lower Mississippi Valley and parts of the Western Gulf Coast that will expand eastward to parts of the Southern Mid-Atlantic to the Southeast by Thursday evening. The showers and thunderstorms will move to the Mid-Atlantic Coast to the Central Gulf Coast by Friday evening. Rain will develop over parts of the Upper Mississippi Valley/Upper Great Lakes expanding into parts of the Northeast by Thursday evening. Light snow will develop over parts of the Upper Great Lakes while the rain continues over other parts of the Upper Great Lakes/Great Lakes by Thursday evening, ending over the Great Lakes by late Thursday night. The rain will continue over parts of the Northeast through Friday evening. Meanwhile, multiple areas of upper-level energy will move from the Northern High Plains Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php