Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 252 AM EST Fri Jan 26 2024 Valid 12Z Fri Jan 26 2024 - 12Z Sun Jan 28 2024 ..Heavy rain/freezing rain over parts of Northern New England; light Rain/Freezing Rain over parts of the Pacific Northwest... ...Light snow for the Cascades and higher elevation snow across the Central/Southern Rockies and Southwest; Moderate snow over Northern New England... ...There is a Slight Risk of excessive rainfall over parts of the Pacific Northwest Coast on Friday and the Central Gulf Coast into the Central/Southern Appalachians and Mid-Atlantic on Friday and Saturday... A front extending from the Lower Great Lakes/Mid-Atlantic to the Central Gulf Coast on Friday will move off the Northeast Coast, while a wave of low pressure develops over the Western Gulf Coast late Friday that will move northeastward to the Mid-Atlantic by Sunday. Warm air and moisture over the Mid-Atlantic will surge northward into the Northeast as upper-level energy stream across the Northeast producing moderate snow over Maine and heavy rain/freezing rain over parts of Upstate New York into Vermont/New Hampshire on Friday. The snow and rain/freezing rain will end by Saturday. Furthermore, moisture from the Gulf of Mexico will flow northward over the Central Gulf Coast into Tennessee Valley/Southeast, producing showers and thunderstorms with heavy rain. Therefore, the WPC has issued a Slight Risk of excessive rainfall over parts of the Central Gulf Coast into Tennessee Valley/Southeast through Saturday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. On Saturday, as the wave of low pressure moves from the Lower Mississippi Valley to the Mid-Atlantic, the area of excessive rainfall moves northeastward to Central Appalachians/Mid-Atlantic. Therefore, the WPC has issued a Slight Risk of excessive rainfall over parts of the Central/Southern Appalachians and Mid-Atlantic from Saturday into Sunday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, and small streams the most vulnerable. Moreover, light snow will fall over parts of the Lower Great Lakes along the northern edge of the precipitation shield. Meanwhile, a weakening front moves over the Pacific Northwest on Friday. A plume of moisture will stream into parts of the Northwest, producing heavy rain along parts of the Oregon and Northern California Coast. Therefore, the WPC has issued a Slight Risk of excessive rainfall over parts of the Oregon and Northern California Coast. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, and burn scars the most vulnerable. Also, on Friday, the moisture will produce rain and highest elevation snow over parts of the Pacific Northwest into the Northern Intermountain Region. There will be pockets of rain/freezing rain over parts of the region, with a few pockets of rain/freezing rain extending into Saturday. Moreover, upper-level energy moving across the Central/Southern Rockies will produce light snow over the area on Friday. Further, the threat of excessive rainfall decreases slightly on Saturday. Therefore, the WPC has issued a Marginal Risk of excessive rainfall over parts of Northern California and the Pacific Northwest from Saturday through Sunday morning. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php