NWS Marine Forecast


   ANZ500-212000-  226 AM EDT Fri Aug 21 2026      .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY...    A cold front will slowly approach from Pennsylvania today as a warm  front approaches from the Virginia Tidewater and Delmarva Peninsula.  Multiple weak waves of low pressure along these boundaries will  ignite scattered to numerous showers and thunderstorms. Some storms  may be severe particularly east of the Blue Ridge and Catoctin  Mountains, and especially across the Interstate 95 corridor toward  the Chesapeake Bay. This frontal system is expected to stall near or  just southeast of the Mid-Atlantic, and additional ripples of low  pressure riding along it may result in periodic showers and a few  thunderstorms at times through the upcoming weekend.    $$
   ANZ539-212000-  Chester River to Queenstown MD-  226 AM EDT Fri Aug 21 2026    OVERNIGHT  N winds 10 kt. Waves 1 to 2 ft.  FRI  N winds 5 to 10 kt. Waves 1 ft.  FRI NIGHT  E winds around 5 kt. Waves 1 ft. A chance of showers.  SAT  E winds 5 kt. Waves less than 1 ft. Showers likely with a  chance of tstms.  SAT NIGHT  E winds 5 kt. Waves flat. A chance of showers and  tstms.  SUN  W winds 5 kt. Waves less than 1 ft. A chance of showers.  SUN NIGHT  NW winds 5 to 10 kt. Waves 1 ft.  MON  NW winds 5 to 10 kt. Waves 1 ft.  TUE  SW winds around 5 kt. Waves 1 ft or less.    Winds and waves higher and visibilities lower in and near tstms.    $$