Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 401 AM EDT Wed Oct 26 2022 Valid 12Z Wed Oct 26 2022 - 12Z Fri Oct 28 2022 ...There is a Marginal Risk of severe thunderstorms over parts of the Southern Plains from Thursday into Friday morning... â€There is a Marginal Risk of excessive rainfall over parts of Maine through Thursday morning and over the Southern Plains from Thursday into Friday morning... ...Snow for parts of the Cascades and the Northern Rockies will taper off... A front extending from the Upper Great Lakes to the Southeast will move eastward off most of the East Coast by Thursday morning. The system will produce rain from the Great Lakes to the Southeast. Showers and thunderstorms will also develop along the boundary over parts of the Southeast, including Florida. The rain will taper off over the southern Mid-Atlantic/Southeast by Wednesday evening. Meanwhile, weak low pressure off the Mid-Atlantic Coast will move northward to New England Coast by Wednesday afternoon and into Southeastern Canada by Early Thursday. Moisture from the Atlantic will stream into New England through late Wednesday night, producing rain that may be heavy at times. Therefore, the WPC has issued a Marginal Risk of excessive rainfall over parts of New England through Thursday morning. The associated heavy rain will create localized areas of flash flooding, affecting areas that experience rapid runoff with heavy rain. The excessive rainfall threat ends over New England on Thursday. The rain over the Northeast will slowly taper off on Thursday. Moreover, a strong area of upper-level energy over the Northwest will move southeastward to the Southern Plains by Friday. The energy will produce rain and higher-elevation snow over the Pacific Northwest on Wednesday morning, with snow expanding into parts of the Northern/Central Rockies on Wednesday afternoon. The snow slowly ends over the Northern Rockies on Thursday morning. The energy will produce snow over parts of the Central/Southern Rockies, ending by Friday morning. In the meantime, the energy will begin to draw moisture northward from the Western Gulf of Mexico over the Plains on Thursday. A front associated with the energy will also move across the Southern Plains on Thursday, producing showers and strong to severe thunderstorms. Therefore, the SPC has issued a Marginal Risk of severe thunderstorms over parts of the Southern Plains from Thursday into Friday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. The Showers and thunderstorms may produce heavy rain over the Southern Plains. Therefore, the WPC has issued a Marginal Risk of excessive rainfall over parts of the Southern Plains from Thursday into Friday morning. The associated heavy rain will create localized areas of flash flooding, affecting areas that experience rapid runoff with heavy rain. Elsewhere, weak onshore flow off the North Pacific will keep rain and some higher-elevation snow over parts of the Pacific Northwest through Friday. Ziegenfelder Graphics are available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php