Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 248 AM EST Sun Feb 09 2025 Valid 12Z Sun Feb 09 2025 - 12Z Tue Feb 11 2025 ...Snow will taper off across parts of the Northeast... ...Lake-effect snow downwind from the Great Lakes... ...Temperatures will be 10 to 25 degrees below average across the Northern Rockies/Northern High Plains... As low pressure moves off the Northeast Coast, the associated snow will slowly taper off on Sunday. Lake-effect snow will develop over parts of the Upper Great Lakes from Sunday into Tuesday. In addition, lake-effect snow will develop downwind from Lake Ontario, starting later on Sunday and continuing into Monday. Rain will continue from parts of the southern Mid-Atlantic/Central Appalachians to the Lower Mississippi Valley, slowly tapering off to over parts of the southern Mid-Atlantic and Lower Mississippi Valley by Sunday evening. Meanwhile, on Sunday, an Arctic front over Western Canada will move southeastward to the Great Lakes/Ohio Valley and westward to the Great Basin by Tuesday. In the wake of the front, an Arctic high will move into the Northern Plains by Tuesday. Cold air associated with the high will bring temperatures 10 to 25 degrees below average across the Northern Rockies/Northern High Plains. Upslope snow will develop over parts of the Northern Rockies on Sunday, as weak onshore flow will produce coastal rain and snow over parts of the Pacific Northwest. On Monday, the snow will expand into parts of the Northern Plains, continuing to expand into the Central/Plains/Middle Mississippi Valley by Monday evening. In the meantime, a front extending from the southern Mid-Atlantic southwestward to the Southern High Plains will aid in producing scattered rain along the boundary through Monday morning. Also on Monday, moisture from the Gulf will stream moisture northward over the Southern Plains and Lower Mississippi Valley, intersecting the cold air moving south over the Plains, producing a broad area of light snow over Northern/Central Plains and Middle Mississippi/Ohio Valleys and Upper Mississippi Valley. Steadier rain and thunderstorms will develop over parts of the Southern Plains/Lower Mississippi Valley and Tennessee Valley on Monday into Tuesday. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php