Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 333 AM EDT Sun Mar 29 2015 Valid 12Z Sun Mar 29 2015 - 12Z Tue Mar 31 2015 ...Temperatures will be 10 to near 20 degrees below average along the East Coast... ...Snow possible across parts of the Upper Great Lakes... A front extending from the Upper Mississippi Valley to the Southern Rockies/Southwest will move eastward to off most of the East Coast by Monday evening. The storm will produce an area of snow over parts of the Upper Great Lakes that will move into parts of the Northeast by Monday. Rain will also develop over parts of the Upper Mississippi Valley to parts of the Middle Mississippi Valley that will move southeastward to parts of the Mid-Atlantic/Southeast by Monday morning and off the coast by Monday evening. Overnight Sunday, showers and thunderstorms will develop along the boundary over parts of the Lower Mississippi/Tennessee Valleys that will move to Southern Georgia by Monday evening. Meanwhile, a second front over Central Canada will move southward to the Great Lakes to parts of the Upper Mississippi Valley on Monday. The system will produce snow and rain over parts of the Upper Great Lakes and Upper Mississippi Valley by Monday evening. Elsewhere, weak onshore flow over parts of the Pacific Northwest will produce rain over Northwestern Washington State through Monday morning. An approaching front will aid in bringing light to moderate rain to the Pacific Northwest Coast by Monday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php