🌊 US Weather Warriors MarineCast — Monday, August 10, 2026
Dense Fog Advisory remains in effect until 10:00 AM EDT, while showers and thunderstorms plus building evening winds make tonight the rougher period offshore.
Today on the Water: The active Dense Fog Advisory is issued by NWS Morristown, TN, for its listed inland counties; it does not name a Delmarva marine zone. Radar shows a 41 dBZ cell 12 nm NNW of Lewes with a 1 kft top and mesocyclone signature. Showers or thunderstorms are forecast at times. Conditions turn more unsettled tonight, especially in the Atlantic waters.
Atlantic Coastal Waters (Lewes → southern VA coast): Tonight, southwest winds increase to 10 to 15 kt with gusts up to 20 kt before turning west after midnight. Seas build to 2 to 3 ft, with a chance of evening showers and thunderstorms. The lighter offshore window comes Wednesday: west winds around 5 kt and seas around 2 ft.
Delaware Bay: Tonight brings southwest winds at 5 to 10 kt and seas around 2 ft, with a chance of evening showers and thunderstorms. The better Bay window is Wednesday night, when southwest winds ease to 5 to 10 kt and seas fall to 1 ft or less.
Chesapeake Bay & Delmarva-facing Waters: Today, southwest winds near 10 kt turn southeast, with gusts up to 15 kt and waves 1 to 2 ft. A brief period of southerly channeling may affect the middle and open Bay this afternoon and evening, though winds remain below Small Craft Advisory levels. Tonight trends southwest near 10 kt, becoming northwest late, with waves around 1 ft.
Wind & Seas Outlook: The peak Atlantic wind and sea period is tonight, with southwest winds gusting to 20 kt and seas 2 to 3 ft. Conditions ease Wednesday offshore and Wednesday night in Delaware Bay.
Marine Alerts:
- Dense Fog Advisory until 10:00 AM EDT for listed NWS Morristown, TN, inland counties.
Best Window to be Out: Tonight on Chesapeake Bay after winds shift northwest late, where waves are forecast around 1 ft.
Worst Window: Tonight in the Atlantic coastal waters, with southwest gusts up to 20 kt, 2 to 3 ft seas, and evening thunderstorm chances.
Bottom Line: Launch decisions favor protected Chesapeake Bay waters later tonight, while Atlantic trips are better delayed until Wednesday.
— US Weather Warriors #DelmarvaWeather #MarineWeather #BoatingWeather