Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 356 AM EST Sun Jan 05 2014 Valid 12Z Sun Jan 05 2014 - 12Z Tue Jan 07 2014 ...Heavy snow possible from parts of the Lower Missouri Valley into the Great Lakes... ...Freezing rain is possible over interior Northern New England/Northern Mid-Atlantic... ...Temperatures will be 30 to 50 degrees below average from the Northern/Central High Plains to the Upper Mississippi Valley... Cold high pressure over West-Central Canada will move southeastward to the Southern Plains by Monday evening. Cold temperatures associated with the high will move southward over the Plains into the Ohio Valley while moderating. Upslope flow associated the clockwise circulation around the high will produce light snow over parts of the Northern/Central High Plains and parts of the Northern/Central Rockies on Sunday morning, tapering off to a small area of snow over the Central Rockies by Sunday afternoon before ending by Sunday night. Meanwhile, a front extending from the Great Lakes southward to the Western Gulf Coast will develop a wave of low pressure over the Lower Mississippi Valley that will move northeastward into Southeastern Canada by Monday. The boundary will move eastward off the Eastern Seaboard by Monday afternoon as well. The system will produce moderate snow from parts of the Mississippi Valley into the Great Lakes that will move into the Lower Great Lakes/Southern Ontario by Sunday evening, becoming light snow over Central Appalachians/Lower Great Lakes by Monday morning. The storm will also produce light to moderate rain over the Tennessee Valley into the Northern Mid-Atlantic, with a narrow band of rain/freezing rain over parts of the Lower Mississippi Valley into the Ohio Valley on Sunday morning. Another area of rain/freezing rain will develop over parts of the Mid-Atlantic on Sunday morning, too, moving into parts of Northern New England by Monday morning. Light to moderate rain will also move into Southern New England by Monday morning before ending by Monday evening. In the wake of the storm, lake effect snow will develop downwind from the Great Lakes Sunday night into Monday evening. Upper-level energy will begin to move onshore over the Pacific Northwest by Monday evening. The energy will trigger scattered light rain over parts of the region on Monday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php