Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 150 PM EST Tue Jan 21 2014 Valid 00Z Wed Jan 22 2014 - 00Z Fri Jan 24 2014 ...Heavy snow from the Mid-Atlantic to the Northeast Coast... ...Temperatures will be 15 to 30 degrees below average over parts of the Upper Midwest... ...Temperatures will be 15 to 25 degrees below average for the Mid-Atlantic/Central Appalachians into the Lower Great Lakes... Storm along the Mid-Atlantic Coast will deepen rapidly while moving northeastward to the Canadian Maritimes paralleling the Coast by Wednesday evening. The system will produce moderate to heavy snow over the Mid-Atlantic Coast into Southern New England that will move into the Gulf of Maine by Wednesday morning. Light snow will move into parts of Northern New England Coast by late Tuesday night. The snow will end by Wednesday evening. Meanwhile, another storm over the Upper Midwest will move southeastward to the Central Appalachians by Thursday morning. The system will produce light snow over parts of the Upper Mississippi Valley moving into the Great Lakes and the Central Appalachians by Thursday morning. Behind the system, lake effect snow will develop downwind of the Great Lakes on Thursday. In addition, cold high pressure over West-Central Canada will advance southward on Wednesday moving to the Northern Plains by Thursday. The clockwise flow around the high will produce upslope flow over parts of the Central/Northern Rockies, which in turn will aid in the development of light snow over the area on Wednesday. The snow will move southward along the Rockies into the Central/Southern Rockies by Thursday morning. Additionally, northerly flow off the Western Gulf of Mexico will aid in producing light rain over parts of Southern Texas on Thursday morning. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php