103 FXUS01 KWBC 242031 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 430 PM EDT Thu Sep 24 2026 Valid 00Z Fri Sep 25 2026 - 00Z Sun Sep 27 2026 ...A strong coastal low will bring coastal flooding, rip currents, wind gusts, and heavy rain along the East Coast into the weekend.. ...Heavy rainfall/flooding threat from Arizona to the central High Plains through tonight will begin to gradually lessen on Friday... An upper-level trough digging into the eastern U.S. will interact with a cool air mass sliding east into the western Atlantic to develop a deep coastal cyclone just off the East Coast over the next few days.ÂÂThe cool air will be moistened and lifted by the digging upper trough as a large high pressure system feeds that cool air across the still warm waters of the western Atlantic. The result will be a rather strong cyclone that will bring widespread strong to gale-force winds up the East Coast of the U.S. through the next few days. Considerable uncertainty remains regarding this cyclone's track, but models agree that the cyclone center will approach and then stall just off southeastern New England Friday and into the weekend. Much of Friday could remain rain free along the East Coast but cool and damp northeasterly winds will continue to strengthen as the storm deepens offshore. Steady rain may hold off until Friday night across southeastern New England before spreading gradually westward into southern New England by Saturday morning. Additionally, expect wind gusts in excess of 45 mph, moderate to major coastal flooding, high surf, rip currents, and beach erosion. Please see the latest WPC Key Messages for this system at wpc.ncep.noaa.gov. Meanwhile, monsoonal moisture across the Four Corners will be lifted ahead of an upper-level trough moving onshore into Baja California, bringing a moderate risk of flash flooding over south-central New Mexico and a slight risk of flash flooding through the southern Rockies to the southern High Plains through tonight. The associated plume of moisture will gradually shift east together with the upper trough, allowing the heavy rain threat to gradually diminish on Friday for the southern Rockies to the southern High Plains. However, a slight risk of excessive rainfall is forecast for southeastern New Mexico due to saturated soils from previous rainfall.ÂÂFriday into Saturday morning should see moderate to locally heavy rain developing and meandering over the central Plains toward Iowa and Missouri ahead of a low-pressure wave and a stationary front. A strong Pacific shortwave will deepen as it moves into the Pacific Northwest late today. The strong dynamics associated with this system will result in widespread showers across Washington and Oregon reaching the coast later today and through the interior Pacific Northwest on Friday. With the arrival of cooler air, wet snow may occur over the highest elevations within the northern Rockies and Cascades. Kong Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$