Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 315 AM EST Mon Jan 06 2014 Valid 12Z Mon Jan 06 2014 - 12Z Wed Jan 08 2014 ...Lake effect snow will impact the Great Lakes... ...Temperatures will be 20 to 40 degrees below average over the Northern Plains/Upper Mississippi Valley into the Middle Mississippi Valley/Western Ohio and Tennessee Valleys... A strong front along the Eastern Seaboard will move out over the Western Atlantic by Monday evening. The storm will produce light to moderate rain over parts of the Northern Mid-Atlantic into New England tapering off by Monday evening. Before the precipitation ends, the rain will change over to snow over New England and coastal Mid-Atlantic. In addition, light rain will develop over parts of the Southern Mid-Atlantic into the Southeast before ending by Monday afternoon. Behind the system, cold air flowing over the Great Lakes and counter-clockwise upper-level flow will aid in producing lake effect snow downwind from the Lakes through Tuesday. Snow will also develop over parts of the Central Appalachians on Monday morning, ending by Monday evening. Meanwhile, cold high pressure over the Plains will move southeastward to the Eastern Gulf Coast/Southeast by Tuesday evening. Very cold temperatures will be associated with this region of high pressure. Upper-level energy will move onshore over the Pacific Northwest, by Monday evening, moving to the Central Rockies by Tuesday evening. The energy will produce light rain along the Pacific Northwest with snow at higher elevations starting by Monday evening. Areas of snow will develop over parts of the Northern/Central Rockies by Tuesday evening. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php