FZUS51 KLWX 291134 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 734 AM EDT Tue Apr 29 2025 Tidal Potomac River and Maryland portion of Chesapeake Bay. Forecasts of wave heights do not include effects of wind direction relative to tidal currents. Expect higher waves when winds are blowing against the tidal flow. Waves flat where waters are iced over. ANZ500-292000- 734 AM EDT Tue Apr 29 2025 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... Canadian high pressure slowly exits the Atlantic coast early this morning, while a warm front tracks through the area this afternoon. A cold front will drop into the area late tonight before stalling nearby or just to the south through Thursday morning. This system returns northward as a warm front on Thursday before a strong cold front moves in from the west on Friday. Another Canadian high pressure system arrives for the weekend. Small Craft Advisories may be needed late in the week with the cold front. $$ ANZ535-292000- Tidal Potomac from Key Bridge to Indian Head- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt late. Waves 1 to 2 ft. .TONIGHT...SW winds 10 to 15 kt. Gusts up to 25 kt in the evening. Waves 1 ft. .WED...NW winds 5 kt. Waves less than 1 ft. A chance of showers. .WED NIGHT...NE winds around 5 kt. Waves 1 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .THU NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely through the day, then a chance of showers in the evening. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ536-292000- Tidal Potomac from Indian Head to Cobb Island- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .WED...NW winds 5 to 10 kt...becoming N late. Waves 1 ft. A chance of showers. .WED NIGHT...E winds around 5 kt. Waves 1 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .THU NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI...SW winds 10 to 15 kt. Waves 1 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely through the day, then a chance of showers in the evening. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ537-292000- Tidal Potomac from Cobb Island to Smith Point- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...S winds 15 kt with gusts to 20 kt. Waves 2 ft. .TONIGHT...SW winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. .WED...W winds 5 to 10 kt...becoming N late. Waves 1 ft. A chance of showers. .WED NIGHT...E winds around 5 kt. Waves 1 ft or less. .THU...E winds 5 to 10 kt. Waves 1 ft. A chance of showers. .THU NIGHT...S winds 10 to 15 kt. Waves 1 ft. .FRI...SW winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely. A chance of showers after midnight. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ530-292000- Chesapeake Bay north of Pooles Island- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...S winds 10 to 15 kt with gusts to 25 kt. Waves 1 to 2 ft. .TONIGHT...SW winds 10 to 15 kt with gusts to 25 kt... diminishing to 5 to 10 kt late. Waves 1 to 2 ft. .WED...NW winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...NE winds around 5 kt. Waves flat. .THU...SE winds 5 to 10 kt. Waves 1 ft or less. .THU NIGHT...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI...SW winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely through the day, then a chance of showers in the evening. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ531-292000- Chesapeake Bay from Pooles Island to Sandy Point- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...S winds 15 kt with gusts to 25 kt. Waves 2 ft. .TONIGHT...S winds 15 to 20 kt with gusts to 25 kt... becoming SW 10 kt late. Waves 2 to 3 ft. .WED...NW winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...NE winds 5 kt. Waves less than 1 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft or less. .THU NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI...SW winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely through the day, then a chance of showers in the evening. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ538-292000- Patapsco River including Baltimore Harbor- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...S winds 10 to 15 kt. Gusts up to 20 kt... increasing to 25 kt late. Waves 1 to 2 ft. .TONIGHT...SW winds 10 to 15 kt with gusts to 25 kt... diminishing to 5 to 10 kt late. Waves 1 to 2 ft. .WED...NW winds 5 kt. Waves less than 1 ft. .WED NIGHT...NE winds around 5 kt. Waves flat. .THU...SE winds 5 to 10 kt. Waves 1 ft or less. .THU NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 5 to 10 kt. Waves 1 ft or less. Showers likely through the day, then a chance of showers in the evening. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ539-292000- Chester River to Queenstown MD- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...S winds 15 kt with gusts to 25 kt. Waves 2 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 25 kt... becoming SW late. Waves 2 ft. .WED...NW winds 5 to 10 kt. Waves 1 ft. .WED NIGHT...NE winds 5 kt. Waves less than 1 ft. .THU...SE winds 5 kt. Waves less than 1 ft. .THU NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI...SW winds 5 to 10 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely through the day, then a chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ532-292000- Chesapeake Bay from Sandy Point to North Beach- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...S winds 15 kt with gusts to 25 kt. Waves 2 to 3 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 25 kt... becoming SW late. Waves 2 to 3 ft. .WED...NW winds 5 to 10 kt...becoming N late. Waves 1 ft. .WED NIGHT...NE winds 5 kt. Waves less than 1 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...S winds 10 kt. Waves 2 ft. A chance of showers. .FRI...SW winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely through the day, then a chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ540-292000- Eastern Bay- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...S winds 15 kt with gusts to 25 kt. Waves 2 ft. .TONIGHT...S winds 10 to 15 kt with gusts to 25 kt... becoming SW late. Waves 2 ft. .WED...NW winds 5 to 10 kt...becoming N late. Waves 1 ft. .WED NIGHT...NE winds 5 kt. Waves flat. .THU...SE winds 5 to 10 kt. Waves 1 ft or less. .THU NIGHT...S winds 5 to 10 kt. Waves 1 ft. A chance of showers. .FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely through the day, then a chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ533-292000- Chesapeake Bay from North Beach to Drum Point- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...S winds 15 kt with gusts to 25 kt. Waves 2 to 3 ft. .TONIGHT...S winds 10 to 15 kt...becoming SW late. Gusts up to 25 kt. Waves 2 to 3 ft. .WED...W winds 5 to 10 kt...becoming N in the afternoon. Waves 1 ft. A chance of showers. .WED NIGHT...NE winds 5 kt. Waves less than 1 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...S winds 10 to 15 kt. Waves 2 ft. A chance of showers. .FRI...SW winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 10 kt. Waves 1 ft. Showers likely through the day, then a chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ541-292000- Choptank River to Cambridge MD and the Little Choptank River- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...S winds 15 kt with gusts to 25 kt. Waves 2 ft. .TONIGHT...S winds 15 kt...becoming SW late. Gusts up to 25 kt. Waves 2 ft. .WED...W winds 5 to 10 kt...becoming N in the afternoon. Waves 1 ft. .WED NIGHT...NE winds around 5 kt. Waves flat. .THU...SE winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...S winds 10 to 15 kt. Waves 1 ft. A chance of showers. .FRI...SW winds 10 to 15 kt. Waves 1 to 2 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely through the day, then a chance of showers through the night. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ542-292000- Patuxent River to Broomes Island MD- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH THIS EVENING... .TODAY...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 ft. .TONIGHT...SW winds 10 kt with gusts to 20 kt. Waves 1 ft. .WED...W winds 5 to 10 kt...becoming N in the afternoon. Waves 1 ft. A chance of showers. .WED NIGHT...E winds around 5 kt. Waves 1 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. A chance of showers. .THU NIGHT...S winds 5 to 10 kt. Waves 1 ft. .FRI...SW winds 5 to 10 kt. Waves 1 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 5 to 10 kt. Waves 1 ft. Showers likely. A chance of showers after midnight. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ534-292000- Chesapeake Bay from Drum Point to Smith Point- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...S winds 15 kt with gusts to 25 kt. Waves 3 ft. .TONIGHT...S winds 15 kt...becoming SW late. Waves 3 ft. .WED...W winds 10 to 15 kt...becoming N 5 kt in the afternoon. Waves 1 to 2 ft. A chance of showers. .WED NIGHT...E winds 5 kt. Waves less than 1 ft. .THU...SE winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 2 ft. A chance of showers. .FRI...S winds 10 to 15 kt. Waves 2 to 3 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...NW winds 10 to 15 kt. Waves 1 to 2 ft. Showers likely. A chance of showers after midnight. Winds and waves higher and visibilities lower in and near tstms. $$ ANZ543-292000- Tangier Sound and the inland waters surrounding Bloodsworth Island- 734 AM EDT Tue Apr 29 2025 ...SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT... .TODAY...S winds 15 kt with gusts to 25 kt. Waves 2 ft. .TONIGHT...S winds 15 to 20 kt with gusts to 25 kt. Waves 2 ft. .WED...W winds 10 to 15 kt...becoming NW 5 to 10 kt in the afternoon. Waves 1 to 2 ft. .WED NIGHT...E winds 5 kt. Waves flat. .THU...SE winds 5 to 10 kt. Waves 1 ft. .THU NIGHT...S winds 10 to 15 kt with gusts to 20 kt. Waves 1 to 2 ft. A chance of showers. .FRI...S winds 10 to 15 kt. Waves 2 ft. A chance of showers in the afternoon. Showers likely with a chance of tstms through the night. .SAT...W winds 10 to 15 kt...becoming NW. Waves 1 ft. Showers likely. A chance of showers after midnight. Winds and waves higher and visibilities lower in and near tstms. $$