Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 250 AM EST Mon Jan 06 2025 Valid 12Z Mon Jan 06 2025 - 12Z Wed Jan 08 2025 ...Moderate to heavy snow from the Ohio Valley to the Mid-Atlantic through late Monday night... ...Light rain/freezing rain over parts of the Ohio Valley to the Mid-Atlantic on Monday... ...There is a Marginal Risk (level 1/5) of severe thunderstorms over parts of the Southeast on Monday... A significant storm over the Ohio Valley will move eastward off the Mid-Atlantic Coast by Monday evening. On Monday, a major disruptive winter storm will affect the area from the Ohio Valley to the Mid-Atlantic, leading to severe travel delays. The storm will produce moderate to heavy snow from parts of the Ohio Valley through to the Mid-Atlantic. The snow will continue into late Monday night over the Mid-Atlantic. The system will produce 6-12 inches of snow across the Mid-Atlantic, including the Washington, D.C. metro area. Travelers should anticipate significant disruptions. An additional 2-4 inches of snow will fall across portions of the Ohio Valley and Central Appalachians, where travel disruptions will continue. Furthermore, light icing/freezing rain will develop over parts of Ohio Valley to the Mid-Atlantic, ending by Monday evening over the Mid-Atlantic. Dangerous travel conditions will develop over the region. Moreover, as the associated front moves across the Southeast, strong to severe thunderstorms will develop over parts of the region on Monday. Therefore, the SPC has issued a Marginal Risk (level 1/5) of severe thunderstorms over parts of the Southeast through Tuesday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, isolated tornadoes, and a minimal threat of hail. In addition, on Monday, light lake-effect snow will be ongoing downwind from the Great Lakes and upslope snow over parts of the Northeast. In the wake of the storm, on Tuesday, light to moderate lake-effect snow will continue downwind from the Great Lakes and into upslope regions of Northern New England. Meanwhile, on Monday, upper-level energy over the Northwest will move southward to Northwestern Mexico by Tuesday night, creating a deep upper-level trough over the Southwest. The energy will produce coastal rain and higher-elevation snow over parts of the Pacific Northwest and Northern California through Monday afternoon. Light snow will continue over the Northern Intermountain Region, the Great Basin, and the Northern Rockies by Monday evening. The light snow will expand into parts of the Central Rockies overnight Monday and into the Southern Rockies on Tuesday. By Tuesday evening, light snow will expand into parts of the Central/Southern High Plains. Further, additional upper-level energy will come onshore over the Pacific Northwest Tuesday evening into Wednesday. The new energy will create light coastal rain and higher-elevation snow over parts of the Pacific Northwest. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php