Expires:202405182000;;405440 FZUS51 KLWX 180535 CWFLWX Coastal Waters Forecast National Weather Service Baltimore MD/Washington DC 135 AM EDT Sat May 18 2024 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. ANZ500-182000- 135 AM EDT Sat May 18 2024 .SYNOPSIS FOR THE TIDAL POTOMAC AND MD PORTION OF THE CHESAPEAKE BAY... Low pressure will progress offshore this weekend. High pressure will build over the waters on Monday and Tuesday, before a strong cold front approaches during the middle of the week. Small Craft Advisories may be needed for portions of the waters on Saturday and Sunday. $$