Tidal Potomac from Indian Head to Cobb Island MD Marine Forecast
| Rest Of This Afternoon...E Winds 5 Kt. Waves Less Than 1 Ft. Scattered Showers And Tstms. |
| Tonight...S Winds 5 Kt. Waves Less Than 1 Ft. Scattered Showers And Tstms. |
| Sun...W Winds 5 To 10 Kt. Waves 1 Ft. |
| Sun Night...Nw Winds Around 5 Kt. Waves 1 Ft. |
| Mon...W Winds Around 5 Kt. Waves 1 Ft. |
| Mon Night...Nw Winds Around 5 Kt. Waves 1 Ft. |
| Tue...W Winds Around 5 Kt. Waves 1 Ft Or Less. |
| Wed...E Winds Around 5 Kt...Becoming Se. Waves 1 Ft. Winds And Waves Higher And Visibilities Lower In And Near Tstms. |
| Area Forecast Discussion National Weather Service Baltimore MD/Washington DC 234pm EDT Sat August 22 2026 .WHAT HAS CHANGED... Severe weather risk increasing tonight for areas west of the Blue Ridge Mountains. .KEY MESSAGES... - 1) Showers and thunderstorms expected tonight with a cold frontal passage, some possibly severe, especially west of the Blue Ridge Mountains. - 2) Dry conditions anticipated early next week. - 3) Warmer and more humid conditions return mid-week, with thunderstorm chances returning by Thursday. KEY MESSAGE 1...Showers and thunderstorms expected tonight with a cold frontal passage, some possibly severe, especially west of the Blue Ridge Mountains. Showers and thunderstorms have begun to develop west of the Blue Ridge Mountains where clear skies have allowed for sufficient destabilization to occur. We're also currently watching storms over eastern Ohio where Storm Prediction Center has issued a SVR TSTM Watch. CAM guidance show a broken line of thunderstorms forming in the lee of the Appalachians tracking eastward this evening across the rest of the forecast area ahead of cold front. Some storms may be severe, but as storms travel east late this evening and overnight, expect a gradual weakening trend due to more stable air and gradual stabilization due to nocturnal cooling. Showers or storms may persist until early morning across the Chesapeake Bay and northeast Maryland. The front will clear the forecast area overnight, but some upslope showers may persist on the upslope areas of the Appalachians in NW flow. Breezy and cooler Sunday with scattered fair weather clouds. A sprinkle here in there is possible, but mainly dry. KEY MESSAGE 2...Dry conditions anticipated early next week. On Monday, we are expecting a cold front to pass through our region. Behind the front, northwesterly winds usher in dry air from central Canada. These sub-60F dewpoints could persist until midweek. With high pressure building over the Appalachian Mountains, drier and cooler conditions could last until late Tuesday. Overall, we are expecting highs to remain in the 70s and mid 80s early next week. Overnight lows ranging in the 50s and 60s throughout the region. KEY MESSAGE 3...Warmer and more humid conditions return mid-week, with thunderstorm chances returning by Thursday. Heading into the middle of next week, surface winds shift southerly. As this tropical air mass moves through our region, humid conditions return through the end of the week. Temperatures rise back into late- August normals with highs in the 80s and 90s Thursday. Late next week, models depict a cold front drapping north to south across the Mid-Atlantic. As an upper-level low near Hudson Bay pushes this front across our region, chances for showers and thunderstorms return. Marine SE winds this afternoon, then becoming NW Sunday. SMWs may be required later this evening and overnight with showers and thunderstorms. Winds shift southerly by Wednesday, with winds gusting above SCA (Small Craft Advisory) thresholds later that evening in a classic southerly channeling event ahead of an approaching cold front. Coastal Flooding Easterly winds have raised water levels significantly along the western shore of the Chesapeake Bay with most guidance greatly underestimating the pile up of water. Only CBFOS guidance has performed well so far. With the higher of the astronomical tides coming up tonight and elevated water levels, minor coastal flooding seems likely at Annapolis. NOAA Baltimore MD/Washington DC Office: Watches - Warnings - Advisories DC...None. MD...Coastal Flood Advisory from 11pm this evening to 6am EDT Sunday for MDZ014. VA...None. WV...None. Marine None. |
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