Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 347 AM EDT Wed Mar 26 2014 Valid 12Z Wed Mar 26 2014 - 12Z Fri Mar 28 2014 ...A rapidly deepening coastal storm will move into the Canadian Maritimes by Thursday... ...Temperatures will be 15 to 25 degrees below average from the Lower Great Lakes to the Mid-Atlantic... A deep upper-level trough over the West Coast will move inland to the Plains by Thursday evening. The associated boundary will move from the Great Basin eastward to the Upper Great Lakes to the Southern Plains by Thursday. Onshore flow will direct moisture off the Pacific into the West Coast producing coastal rain and higher elevation snow from Central California to the Pacific Northwest through Thursday. Farther inland, snow will develop over parts of the Great Basin/Northern Intermountain Region into parts of the Northern/Central Rockies also through Thursday. High pressure over the Ohio Valley will move eastward out over the Western Atlantic by Thursday evening. Circulation around the high will stream moisture from the Western Gulf of Mexico inland over the Mississippi Valley into the Great Lakes. Rain with embedded showers/thunderstorms will develop over parts of the Western Texas into the Middle/Lower Mississippi Valley on Wednesday. Showers and thunderstorms will develop over parts of the Southern Plains that will expand northward into the Ohio Valley by Thursday evening. Rain will also develop over parts of the Middle/Upper Mississippi Valley on Thursday morning moving into parts of the Great Lakes by Thursday evening. Snow will likewise develop over parts of the Upper Midwest on Wednesday evening moving into the Upper Great Lakes and into parts of the Northeast by Thursday evening. Meanwhile, a rapidly deepening storm over the Northeast Coast will move in to the Canadian Maritimes by Thursday morning. The system will produce heavy snow over parts of the New England Coast on Wednesday morning tapering off to light snow over Eastern Maine by Wednesday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php