178 WHUS51 KLWX 201504 SMWLWX ANZ532-533-540>542-201700- /O.NEW.KLWX.MA.W.0049.260420T1504Z-260420T1700Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Baltimore MD/Washington DC 1104 AM EDT Mon Apr 20 2026 The National Weather Service in Sterling Virginia has issued a * Special Marine Warning for... Chesapeake Bay from North Beach to Drum Point MD... Chesapeake Bay from Sandy Point to North Beach MD... Choptank River to Cambridge MD and the Little Choptank River... Eastern Bay... Patuxent River to Broomes Island MD... * Until 100 PM EDT. * At 1103 AM EDT, strong thunderstorms were located along a line extending from near Tidal Basin to Woodrow Wilson Bridge to Mason Neck State Park, moving east at 30 knots. HAZARD...Wind gusts 34 knots or greater and small hail. SOURCE...Radar indicated. IMPACT...Boaters in small craft could be thrown overboard by suddenly higher winds and waves capsizing their vessel. * Locations impacted include... Choptank River, Greenwell State Park, Saint Leonard Creek, Knapps Narrows Bridge, Tilghman Island, Blackwalnut Point, Chesapeake Beach, Solomons Island, Cuckold Creek, Town Creek, North Beach, Drum Point, Herring Bay, Sandy Point State Park, Bloody Point Light, Matapeake, Chesapeake Bay Bridge, James Island, Calvert Cliffs, and Thomas Point Light. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor immediately as gusty winds and high waves are expected. && LAT...LON 3861 7627 3848 7633 3835 7625 3829 7645 3839 7656 3843 7645 3870 7655 3902 7640 3899 7633 3884 7637 3885 7636 3886 7633 3894 7628 3893 7628 3867 7634 3873 7632 3877 7631 3876 7623 3859 7605 TIME...MOT...LOC 1503Z 277DEG 28KT 3891 7693 3877 7704 3866 7722 HAIL...<.75IN WIND...>34KTS $$ DHOF  148 FZUS71 KOKX 201508 MWSOKX Marine Weather Statement National Weather Service New York NY 1108 AM EDT Mon Apr 20 2026 ANZ350-353-380-383-201600- 1108 AM EDT Mon Apr 20 2026 ...THUNDERSTORMS OVER THE WATERS SOUTH OF EASTERN LONG ISLAND... The areas affected include... Fire Island Inlet to Montauk Point NY out 60 nm At 1106 AM EDT, Doppler radar continues to track a broken line of thunderstorms, capable of producing winds up to 30 kt and small hail. These thunderstorms were located along a line extending from 11 nm S of Moriches Inlet to 11 nm E of Buoy 44025 to 33 nm E of Shark River Reef, moving E at 25 kt. These thunderstorms will remain over the open waters. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect gusty winds up to 30 kt, locally higher seas, and lightning strikes. && LAT...LON 4076 7203 4028 7225 4005 7234 4005 7306 4022 7300 4062 7281 $$ Goodman  305 FZUS71 KLWX 201511 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 1111 AM EDT Mon Apr 20 2026 ANZ536-201545- /O.CON.KLWX.MA.W.0048.000000T0000Z-260420T1545Z/ 1111 AM EDT Mon Apr 20 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 1145 AM EDT... For the following areas... Tidal Potomac from Indian Head to Cobb Island MD... At 1111 AM EDT, a front was located along a line extending from near Gunston Hall to near Leesylvania State Park to 11 nm west of Quantico, moving southeast at 25 knots. HAZARD...Wind gusts 34 knots or greater. SOURCE...Observed wind. IMPACT...Boaters in small craft could be thrown overboard by suddenly higher winds and waves capsizing their vessel. Locations impacted include... Potomac Creek, Maryland Point, Nanjemoy Creek, Port Tobacco River, Leesylvania State Park, Quantico, Swan Point, Mathias Point, U.S. 301 Nice Memorial Bridge, Mason Neck State Park, Indian Head, Occoquan Bay, Popes Creek, Brent Point, Smallwood State Park, Widewater, Westmoreland State Park, Cobb Island, Fairview Beach, and Colonial Beach. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor immediately as gusty winds and high waves are expected. && LAT...LON 3849 7733 3867 7724 3866 7719 3864 7720 3865 7716 3868 7718 3863 7709 3851 7724 3839 7723 3846 7701 3835 7696 3828 7685 3817 7686 3821 7695 3826 7696 3830 7703 3838 7706 3833 7717 3833 7730 TIME...MOT...LOC 1511Z 297DEG 25KT 3870 7714 3861 7732 3855 7754 HAIL...0.00IN WIND...>34KTS $$ DHOF  215 FZUS71 KLWX 201534 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 1134 AM EDT Mon Apr 20 2026 ANZ532-533-540>542-201700- /O.CON.KLWX.MA.W.0049.000000T0000Z-260420T1700Z/ 1134 AM EDT Mon Apr 20 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 100 PM EDT... For the following areas... Chesapeake Bay from North Beach to Drum Point MD... Chesapeake Bay from Sandy Point to North Beach MD... Choptank River to Cambridge MD and the Little Choptank River... Eastern Bay... Patuxent River to Broomes Island MD... At 1134 AM EDT, strong thunderstorms were located along a line extending from 7 nm west of Mayo to 10 nm east of National Harbor to 6 nm south of Fort Washington, moving east at 30 knots. HAZARD...Wind gusts 34 knots or greater and small hail. SOURCE...Observed wind. IMPACT...Boaters in small craft could be thrown overboard by suddenly higher winds and waves capsizing their vessel. Locations impacted include... Choptank River, Greenwell State Park, Saint Leonard Creek, Knapps Narrows Bridge, Tilghman Island, Blackwalnut Point, Chesapeake Beach, Solomons Island, Cuckold Creek, Town Creek, North Beach, Drum Point, Herring Bay, Sandy Point State Park, Bloody Point Light, Matapeake, Chesapeake Bay Bridge, James Island, Calvert Cliffs, and Thomas Point Light. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor immediately as gusty winds and high waves are expected. && LAT...LON 3861 7627 3848 7633 3835 7625 3829 7645 3839 7656 3843 7645 3870 7655 3902 7640 3899 7633 3884 7637 3885 7636 3886 7633 3894 7628 3893 7628 3867 7634 3873 7632 3877 7631 3876 7623 3859 7605 TIME...MOT...LOC 1534Z 277DEG 28KT 3888 7668 3874 7679 3863 7697 HAIL...<.75IN WIND...>34KTS $$ DHOF  232 FZUS71 KLWX 201535 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 1135 AM EDT Mon Apr 20 2026 ANZ535-201545- /O.EXP.KLWX.MA.W.0047.000000T0000Z-260420T1545Z/ 1135 AM EDT Mon Apr 20 2026 ...THE SPECIAL MARINE WARNING WILL EXPIRE AT 1145 AM EDT... The affected areas were... Tidal Potomac from Key Bridge to Indian Head MD... The showers have moved out of the area and no longer pose a significant threat to boaters. && LAT...LON 3869 7716 3871 7717 3873 7706 3890 7708 3891 7705 3885 7700 3872 7700 3871 7702 3870 7702 3870 7704 3867 7709 3868 7711 3867 7712 3864 7711 3865 7714 3867 7716 3869 7719 TIME...MOT...LOC 1535Z 291DEG 22KT 3890 7676 3883 7683 3877 7693 $$ DHOF  938 WHUS51 KPHI 201544 SMWPHI ANZ455-485-201645- /O.NEW.KPHI.MA.W.0019.260420T1544Z-260420T1645Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Mount Holly NJ 1144 AM EDT Mon Apr 20 2026 The National Weather Service in Mount Holly NJ has issued a * Special Marine Warning for... Coastal waters from Cape Henlopen to Fenwick Island DE out 20 nm... Outer waters from Cape May NJ to Fenwick Island DE from 20 to 60 nm... * Until 1245 PM EDT. * At 1144 AM EDT, a severe thunderstorm producing waterspouts was located 7 nm east of Fenwick Island, moving east at 15 knots. HAZARD...Waterspouts and wind gusts 34 knots or greater. SOURCE...Public. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include... Delaware Lightship Buoy 44009. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor immediately as gusty winds and high waves are expected. Thunderstorms can produce sudden waterspouts. Waterspouts can easily overturn boats and create locally hazardous seas. Seek safe harbor immediately. && LAT...LON 3830 7455 3844 7499 3856 7497 3857 7426 3822 7427 TIME...MOT...LOC 1544Z 277DEG 16KT 3847 7490 WATERSPOUT...OBSERVED HAIL...0.00IN WIND...>34KTS $$ Hoeflich  305 WHUS51 KLWX 201547 SMWLWX ANZ536-537-201745- /O.NEW.KLWX.MA.W.0050.260420T1547Z-260420T1745Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Baltimore MD/Washington DC 1147 AM EDT Mon Apr 20 2026 The National Weather Service in Sterling Virginia has issued a * Special Marine Warning for... Tidal Potomac from Cobb Island MD to Smith Point VA... Tidal Potomac from Indian Head to Cobb Island MD... * Until 145 PM EDT. * At 1147 AM EDT, gust fronts were located along a line extending from 8 nm northeast of Port Tobacco River to Nanjemoy Creek to Fairview Beach, moving southeast at 25 knots. HAZARD...Wind gusts 34 knots or greater. SOURCE...Radar indicated. IMPACT...Boaters in small craft could be thrown overboard by suddenly higher winds and waves capsizing their vessel. * Locations impacted include... Yeocomico River, Breton Bay, Nanjemoy Creek, Swan Point, Coltons Point, Coles Point, Saint George Island, Popes Creek, Saint Clements Bay, Piney Point, Mouth Of The Potomac River, Maryland Point, Port Tobacco River, Colonial Beach, Cobb Island, Point Lookout, Tall Timbers, Nomini Bay, Mathias Point, and U.S. 301 Nice Memorial Bridge. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor immediately as gusty winds and high waves are expected. && LAT...LON 3852 7731 3853 7721 3851 7724 3839 7723 3846 7701 3835 7696 3827 7684 3823 7658 3814 7651 3807 7633 3791 7627 3803 7651 3815 7661 3816 7684 3821 7694 3838 7706 3833 7717 3833 7729 TIME...MOT...LOC 1547Z 297DEG 26KT 3851 7688 3839 7708 3831 7726 HAIL...0.00IN WIND...>34KTS $$ DHOF  333 FZUS71 KOKX 201556 MWSOKX Marine Weather Statement National Weather Service New York NY 1156 AM EDT Mon Apr 20 2026 ANZ380-383-201700- 1156 AM EDT Mon Apr 20 2026 ...A STRONG THUNDERSTORM OVER THE WATERS... The areas affected include... The Open Waters 20 to 60 NM south of Fire Island Inlet to Moriches Inlet NY... The Open Waters 20 to 60 NM south of Moriches Inlet to Montauk Point NY... At 1156 AM EDT, Doppler radar indicated a thunderstorm, capable of producing winds to around 30 knots and small hail. This thunderstorm was located 27 nm east of Buoy 44025, moving east at 20 knots. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until this storm passes. && LAT...LON 4008 7263 4025 7268 4039 7200 4013 7193 $$ DW