Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 402 AM EDT Sun Mar 16 2025 Valid 12Z Sun Mar 16 2025 - 12Z Tue Mar 18 2025 ...Heavy snow moving into the Cascades and northern Intermountain region as a quick round of light to moderate snow i...Heavy snow over the Cascades/Northern Intermountain Region/ Northern Rockies and light to moderate snow over the Upper Great Lakes... ...A Slight Risk of severe thunderstorms over the parts of the Lower Great Lakes, Central Appalachians, Mid-Atlantic, and the Southeast... ...Temperatures will be 15 to 25 degrees above average over parts of the Northeast/Central Appalachians... A front extending from the Lower Great Lakes to the Central Gulf Coast will move off the East Coast by overnight Monday. Ahead of the front, temperatures will be 15 to 25 degrees above average in parts of the Northeast/Central Appalachians. The storm will produce showers and severe thunderstorms from the Lower Great Lakes to the Southeast on Sunday. Therefore, the SPC has issued a Slight Risk (level 2/5) of severe thunderstorms over parts of the Lower Great Lakes, Central Appalachians, Mid-Atlantic, and the Southeast through Monday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. In addition, light to moderate snow will develop over parts of the Upper Great Lakes/Middle Mississippi Valley on Sunday. Also, rain will develop over parts of the Upper Great Lakes and Ohio Valley on Sunday. By Monday, the threat of severe thunderstorms will end as the boundary continues to move eastward over the Atlantic Ocean. Rain will continue over parts of the Northeast into the northern Mid-Atlantic on Monday morning, with a narrow band of light snow on the northwest side of the precipitation shield from parts of the Lower Great Lakes to the Central Appalachians. The rain and snow will wind down over parts of Northern New England by Monday evening. Meanwhile, on Sunday, a second front over the Pacific Northwest will move inland to parts of the Great Lakes to the Central Plains and then southwestward to the Southwest by Tuesday. On Sunday, the system will produce coastal rain and higher-elevation snow over parts of the Pacific Northwest/Northern California. The coastal rain and higher-elevation snow will move into Central California by Sunday afternoon. Furthermore, the snow will be heavy over the Cascades, Northern Intermountain Region, and Northern Rockies. As the system moves onto the Northern Plains, light snow will also develop over parts of the Northern Plains and Upper Mississippi Valley on Sunday. Overnight Sunday, a trailing front will move onshore over parts of California and continue into the Southwest by Monday evening. Coastal rain and higher-elevation snow will continue over parts of California and the Pacific Northwest on Sunday into Monday. Snow moves into the Great Basin and the Central Rockies on Monday morning. The snow will be heavy over the Sierra Nevada Mountains on Monday. Moreover, as part of the boundary moves into the Midwest, light snow continues over parts of the Northern Plains/Upper Mississippi Valley and the Upper Great Lakes on Monday. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php