774 FZUS71 KLWX 121901 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 301 PM EDT Fri Jun 12 2026 ANZ535-536-122100- 301 PM EDT Fri Jun 12 2026 ...A STRONG THUNDERSTORM APPROACHING THE WATERS... The areas affected include... Tidal Potomac from Indian Head to Cobb Island MD... Tidal Potomac from Key Bridge to Indian Head MD... At 259 PM EDT, Doppler radar indicated scattered thunderstorms have formed just west of Dulles International airport, capable of producing winds to around 30 knots. This thunderstorm was located 31 nm west of Key Bridge, moving east at 20 knots.The thunderstorms are expected to reach the tidal Potomac River by 5 PM. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until this storm passes. This strong thunderstorm will likely produce winds to around 30 knots, and could pose a serious hazard for boaters. A special marine warning may eventually be required when this strong thunderstorm reaches the nearshore waters. Boaters should consider heading for shore before this strong thunderstorm arrives. && LAT...LON 3866 7724 3864 7719 3870 7720 3873 7706 3891 7705 3890 7705 3870 7700 3851 7724 3839 7723 3846 7701 3834 7698 3827 7686 3817 7685 3817 7686 3821 7695 3835 7702 3838 7701 3833 7726 3841 7733 $$ LFR 912 FZUS72 KCHS 121906 MWSCHS Marine Weather Statement National Weather Service Charleston SC 306 PM EDT Fri Jun 12 2026 AMZ360-362-122000- 306 PM EDT Fri Jun 12 2026 The areas affected include... Waters from South Santee River SC to Savannah GA out 20 NM... * At 306 PM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots. This strong thunderstorm was located 8 NM northeast of Saint Helena Sound, moving east at 20 knots. Locations impacted include... Edisto Forty Reef, N. Edisto Nearshore Reef, Deveaux Bank, Edisto Sixty Reef, Kiawah Reef, Lowcountry Anglers, Saint Helena Sound and Pelican Bank. PRECAUTIONARY/PREPAREDNESS ACTIONS... Report severe weather to the Coast Guard or nearest law enforcement agency. They will relay your report to the National Weather Service office. Intense lightning is occurring with this storm. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects. && LAT...LON 3246 8051 3251 8049 3252 8048 3253 8043 3251 8040 3253 8037 3252 8032 3261 8015 3263 8003 3259 7986 3226 8004 TIME...MOT...LOC 1906Z 292DEG 19KT 3256 8034 $$ BSH