Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 338 PM EDT Mon Oct 14 2024 Valid 00Z Tue Oct 15 2024 - 00Z Thu Oct 17 2024 ...Wet snow over parts of the Upper Great Lakes to the Northeast and Central Appalachians... ...Rain over parts of the Pacific Northwest and wet snow over parts of the Northern Cascades... ...Lake Effect rain south of the Great Lakes... High pressure over Central Canada will move southward to the Middle Mississippi/Ohio Valleys by Wednesday. The clear sky and calm wind associated with the high have triggered Freeze Warnings, Advisories, and Watches over parts of the Midwest. Moreover, an upper-level low over the Northeast to the Great Lakes will produce lake-effect rain south of the Great Lakes over parts of the Ohio Valley and Central Appalachians through Wednesday afternoon. Wet snow will develop over parts of the Huron Mountains of Michigan s Upper Peninsula through Tuesday night. In addition, rain and wet snow at higher elevations will develop over parts of the Northeast through Wednesday evening. Wet snow will also develop overnight Tuesday over parts of the highest elevations of the Central Appalachians through Wednesday. Meanwhile, easterly flow off the Gulf of Mexico will help produce showers and thunderstorms over parts of the Western Gulf Coast on Wednesday. Additionally, tropical moisture over the Florida Keys will keep showers and thunderstorms in the forecast through Wednesday. Furthermore, a front moving onshore over the Pacific Northwest late Monday afternoon will move inland to the Northern Rockies and Northern California by Wednesday evening. The system will produce light rain over parts of the Pacific Northwest through Wednesday afternoon. On Wednesday, the rain will expand into the Northern Intermountain Region. Moreover, wet snow will develop over parts of the highest elevations of the Northern Cascades on Wednesday. Upper-level dynamic associate with an upper-level low over the Southwest will aid in producing widely scattered showers and thunderstorms over parts of the Great Basin, Southwest, and Central/Southern Rockies from Monday into Wednesday evening. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php