Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 308 PM EDT Mon Apr 14 2025 Valid 00Z Tue Apr 15 2025 - 00Z Thu Apr 17 2025 ...Moderate to heavy snow over the western portion of the Upper Peninsula of Michigan from Monday night into Tuesday and lake-enhanced snow downwind from Lakes Erie and Ontario Tuesday night into Wednesday... ...There is an Enhanced Risk of severe thunderstorms over parts of the Central Appalachians/Mid-Atlantic on Monday... A front extending from the Lower Great Lakes across the Ohio Valley and then over the Lower Mississippi Valley/Southern Pains will move eastward off the Eastern Seaboard and southward to the Gulf Coast by Tuesday evening. The front will create showers and severe thunderstorms over parts of the Ohio Valley to the Mid-Atlantic. Therefore, through Tuesday morning, the SPC has issued an Enhanced Risk (level 3/5) of severe thunderstorms over parts of the Central Appalachians/Mid-Atlantic. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. Moreover, moderate to heavy lake-enhanced snow will develop over the western portion of the Upper Peninsula of Michigan from Monday evening into Tuesday. Showers and thunderstorms will develop over parts of the northern Mid-Atlantic Monday evening into Tuesday as rain moves into parts of the Northeast. Meanwhile, as the system moves farther eastward on Tuesday, light to moderate lake-enhanced snow will develop downwind from Lakes Erie and Ontario and into the Northeast. Upslope snow will develop over parts of the Central Appalachians overnight Tuesday into Wednesday morning. Rain will also develop over parts of the Ohio Valley into the northern Mid-Atlantic. In the meantime, on Tuesday, a front moves onshore over the Pacific Northwest and continues eastward to the Northern Plains to the Northern Intermountain Region and then into the Great Basin by Wednesday evening. On Wednesday, light snow develops over parts of the Northern Rockies and rain at lower elevations. Also on Wednesday, upper-level energy off of the California Coast will move onshore, producing light rain and embedded thunderstorms over parts of Central California into the Great Basin. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php