892 FXUS01 KWBC 190710 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 309 AM EDT Mon Oct 19 2026 Valid 12Z Mon Oct 19 2026 - 12Z Wed Oct 21 2026 ...Flash Flooding risk for portions of the Southwest on Monday... ...Norâ€easter moving north just off the Mid-Atlantic Coast will produce rain showers along parts of the Mid-Atlantic and Northeast Coast through Tuesday... ...Low pressure moving southward along the West Coast will bring scattered showers across parts of California through Tuesday... A non-tropical low pressure offshore of the Carolinas will continue to strengthen while slowly moving northward along the western Atlantic. The system is expected to maintain a broad circulation offshore, with moisture wrapping around the low, supporting possible showers and thunderstorms along portions of the Mid-Atlantic and Northeast coastline through Wednesday. Persistent onshore flow will be favored by the pressure gradient between the coastal low and the high pressure farther inland. Therefore, the strong northeasterly winds will continue to affect coastal portions of the Mid-Atlantic, particularly from the southern New Jersey through the Virginia Tidewater and North Carolina Outer Banks. The prolong onshore flow will bring moderate coastal flooding, dangerous marine conditions, and beach erosion. Farther west, an upper-level disturbance and associated areas of low pressure over eastern Pacific will progress southward along the West Coast. Increasing ascent ahead of the disturbance, combined with Pacific moisture and cooling aloft, will support scattered rainfall across portions of the northern California coast on Monday. Showers and thunderstorms is expected to spread into central and southern California by Tuesday. Some showers and thunderstorms may also develop over portions of the Great Basin and Southwest as the upper-level disturbance moves inland through early Wednesday. The greatest potential for locally heavy rainfall and isolated flash flooding will be on Monday across southeastern Arizona and southwestern New Mexico, where remnant upper-level energy, enhanced Pacific moisture, and instability will support scattered thunderstorms. Across the Southeast, a weak frontal boundary and persistent easterly flow off the Atlantic will maintain scattered showers and thunderstorms across portions of the Florida peninsula through Tuesday. Oudit Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$