Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 323 PM EST Sun Dec 25 2016 Valid 00Z Mon Dec 26 2016 - 00Z Wed Dec 28 2016 ...Heavy snow and poor travel conditions are possible over the Northern Plains... ...Rain and freezing rain is possible over parts of the Great Lakes... ...Heavy snow for the Cascades and Olympic Peninsula on Monday into Tuesday... ...Temperatures will be 15 to 25 degrees above average over parts of the Lower Mississippi Valley into the Great Lakes... A strong storm over Northern Plains will move northeastward into Quebec by Tuesday. The system will produce widespread snow over parts of the Southwest, Great Basin, Northern/Central Rockies, parts of the Central High Plains, Northern Plains, and into the Upper Great Lakes that will end by Monday morning over parts of the Southwest/Great Basin and overnight Monday for the Central Rockies, Central High Plains, and Northern Plains. The snow will wind down over the Upper Great Lakes/Upper Mississippi by Tuesday morning. Areas of rain/freezing rain will develop over parts of the Upper Great Lakes changing over to rain by Monday morning. Additionally, areas of rain/freezing rain will develop over parts of the Northern Appalachians into Northern New England Monday into Monday evening. Furthermore, rain will develop along and ahead of the front from parts of the Northern Plains/Upper Mississippi Valley to the Southern Plains and into parts of the Ohio Valley by evening on Christmas. The rain will move into the Great Lakes overnight Christmas ending by Monday night. The rain will change back over to snow Monday afternoon into Monday night over the Upper Great Lakes. By Tuesday morning, rain will extend from New England southwestward to parts of the Southern Ohio Valley. Showers and thunderstorms will develop over parts of the Lower Mississippi Valley/Eastern Texas moving into parts of the Tennessee Valley on Monday into Tuesday morning. Elsewhere, moisture will return to the Pacific Northwest on Monday ahead of the next front to move onshore over the region. Rain and higher elevation snow will develop over parts of the Pacific Northwest Coast on Monday afternoon that will expand inland to the Northern Rockies by Tuesday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php