987 FXUS01 KWBC 010806 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 406 AM EDT Sat Oct 01 2022 Valid 12Z Sat Oct 01 2022 - 12Z Mon Oct 03 2022 ...Widespread heavy rain, with the threat of some flooding, continue with Post-Tropical Cyclone Ian... ...Showers, thunderstorms, and high elevation snow expected across portions of the Rockies and Southwest... ...Well above average temperatures forecast this weekend for the Plains and the Pacific Northwest... The center of Post-Tropical Cyclone Ian will continue northward Saturday from central North Carolina into south-central Virginia, although the extent of the precipitation associated the system will overspread a much greater area. Widespread showers and some thunderstorms are forecast to continue through the weekend from the central Appalachians into the Mid-Atlantic and southern New England as the extratropical system eventually begins to move to the east and off the coast. Current forecast rainfall totals generally range between 1-2 inches, with dry antecedent conditions keeping the risk of flash flooding isolated. However, two Slight Risks (level 2/4) of Excessive Rainfall are in place Saturday for portions of eastern West Virginia and the immediate coast of the Mid-Atlantic where local enhancement of the rainfall will lead to higher rainfall totals between 2-4 inches, with isolated totals up to 6 inches possible. Forecast highs across the East will be cool, up to 10-15 degrees below average, as the showers and widespread clouds associated with Ian linger and cooler air moves southward behind the system. Highs will range from the mid-50s to mid-60s for the Appalachians, Mid-Atlantic, and Northeast, with 70s for the Southeast. An upper-level low lingering over the interior West as well as a generally stationary frontal system extending from the High Plains through the Central/Southern Rockies and into the Great Basin will continue the chance for showers, thunderstorms, and high elevation snow across the region this weekend. Locally heavy rainfall leading to a few isolated instances of flash flooding are possible as moisture remains high, with broad Marginal Risks (level 1/4) for Excessive Rainfall in place both Saturday and Sunday. In addition to rain, temperatures will remain cool for the Central and Northern Rockies with highs mainly in the 50s and 60s. Wet snow is forecast at higher elevations Saturday, generally above 9000 feet, with some totals over 4 inches possible for the Wind River and Absaroka Ranges of Wyoming. Upper-level ridging will be in place over both the Plains and Northwest leading to well above average high temperatures to start October. Highs in the 80s are forecast across most of the Plains both Saturday and Sunday. The Storm Prediction Center has outlined an area from central Kansas into eastern Nebraska for Elevated fire weather conditions Sunday as the above normal temperatures will combine with dry conditions and increasing winds as lee troughing develops east of the Rockies. Highs in the 80s to 90 degrees are also forecast for portions of the Pacific Northwest, up to 10-20 degrees above normal. Putnam Graphics are available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$