Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 AM EDT Mon Mar 17 2025 Valid 12Z Mon Mar 17 2025 - 12Z Wed Mar 19 2025 ...Heavy snow over the Sierra Nevada Mountains/ Northern Rockies on Monday and Northern/Central Rockies on Tuesday; light to moderate snow from the Central Plains to the Upper Great Lakes on Tuesday into Wednesday morning... ...Temperatures will be 15 to 25 degrees above average over parts of the Central Plains and adjacent regions... ...There is a Critical Risk of fire weather over the parts of the Central/Southern High Plains on Monday and Extreme Risk over the Southern High Plains... A front extending from the Northeast and mid-Atlantic Coast will move off the East Coast by early Tuesday. The boundary will produce rain from the Northeast to the southern Mid-Atlantic, ending over the Mid-Atlantic Coast by Monday evening and the Northeast by Tuesday evening. In addition, light snow will fall on the northwest side of the precipitation shield over the Lower Great Lakes and Central Appalachians through late Monday afternoon. Light snow will also develop over parts of Northern New England from Monday evening into Tuesday morning. Meanwhile, on Monday, a second front extending from parts of the Northern/Central Plains into the Great Basin/Central California will move eastward to the Great Lakes to the Central Plains/ Middle Mississippi Valley and then southward to the Lower Mississippi Valley/Southern Plains by Wednesday. The associated upper-level energy moving onshore over California moves inland to the Central Plains by early Wednesday morning. The energy will produce coastal rain with possible embedded thunderstorms and higher-elevation snow over the Pacific Northwest/California and the western Great Basin that will wane over California by Tuesday morning. The snow will be heavy over the Sierra Nevada Mountains on Monday. Weak onshore flow off the Pacific will keep coastal rain and higher-elevation snow over the Pacific Northwest and Northern Intermountain Region through early Wednesday morning. Overnight, on Monday, the snow will move into the Northern/Central Rockies, eastern Great Basin, and Southwest. On Tuesday, the snow will be heavy over parts of the higher elevations of the Northern/Central Rockies. Moreover, ahead of the front, upper-level ridging will aid in allowing the temperatures to become 15 to 25 degrees above average over parts of the Central Plains and adjacent regions. Further, along the eastern portion of the system, light to moderate snow will develop over parts of the Northern Rockies, Northern Plains, and Upper Mississippi Valley on Monday. Snow will move into parts of the Northern/Central High Plains by Tuesday evening. Additionally, light to moderate snow will develop over the Central Plains, Upper Mississippi Valley, and Upper Great Lakes by Wednesday morning. Showers and thunderstorms will develop south of the front over parts of the Central Plains and Middle Mississippi Valley. Rain will also develop south of the boundary over part of the Upper Great Lakes. Elsewhere, the SPC has issued a Critical Risk of fire weather over parts of the Central/Southern High Plains on Monday and an Extreme Risk of fire weather over the Southern High Plains on Tuesday. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php