Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 216 PM EST Wed Feb 11 2015 Valid 00Z Thu Feb 12 2015 - 00Z Sat Feb 14 2015 ...Temperatures will be 10 to 25 degrees below average from the Appalachians to the Plains... A strong front extending from the Lower Great Lakes a long the Appalachians then westward to the Southern Plains will move off the East and Gulf Coast by Friday. The system will produce light snow over parts of the Lower Great Lakes that will move eastward to the Northeast/Mid-Atlantic by Thursday evening. The snow in general will end over the Northeast by Friday morning. Behind the front, cold high pressure over West-Central Canada will move southeastward to the Ohio and Lower Mississippi Valleys by Friday. Lake effect snow will develop downwind from the ice free areas of the Great Lakes Wednesday evening ending by Thursday evening. In addition, circulation around the high pressure will produce upslope flow over parts of the Southern Rockies/Southern High Plains. Snow will develop over parts of the Southern Rockies through Wednesday evening. Rain will develop over parts of the Southern High Plains that will move into the Lower Rio Grande Valley by Thursday morning. Meanwhile, another front over the Northern/Central High Plains will move eastward as a warm front to the Upper/Middle Mississippi Valley by Friday morning. The system will produce light snow over parts of the Northern Plains on Thursday morning that will move eastward to parts of the Upper Great Lakes by Friday. Elsewhere, upper-level energy and a plume of moisture will nick the the Northwest Coast producing light rain a long parts of the northwest coast of Washington State through Friday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php