636 WHUS51 KLWX 201411 SMWLWX ANZ535-201545- /O.NEW.KLWX.MA.W.0047.260420T1411Z-260420T1545Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Baltimore MD/Washington DC 1011 AM EDT Mon Apr 20 2026 The National Weather Service in Sterling Virginia has issued a * Special Marine Warning for... Tidal Potomac from Key Bridge to Indian Head MD... * Until 1145 AM EDT. * At 1011 AM EDT, showers were located along a line extending from 17 nm northwest of Key Bridge to 20 nm northwest of Alexandria to 23 nm west of Tidal Basin, moving east at 20 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... Tidal Basin, Fort Washington, Reagan National Airport, Gunston Hall, Woodrow Wilson Bridge, Key Bridge, Fort Hunt, National Harbor, and Alexandria. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor immediately as gusty winds and high waves are expected. && 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 1411Z 291DEG 22KT 3908 7737 3901 7744 3895 7754 HAIL...<.75IN WIND...>34KTS $$ DHOF  003 FZUS71 KOKX 201419 MWSOKX Marine Weather Statement National Weather Service New York NY 1019 AM EDT Mon Apr 20 2026 ANZ350-353-355-383-385-201515- 1019 AM EDT Mon Apr 20 2026 ...STRONG THUNDERSTORMS OVER THE WATERS... The areas affected include... Sandy Hook NJ to Moriches Inlet NY out 60 nm... Moriches Inlet to Montauk Point NY out 20 nm... At 1017 AM EDT, Doppler radar indicated a broken line of thunderstorms capable of producing winds up to 30 kt and small hail. These thunderstorms were located along a line extending from just south of the Great South Bay to 11 nm SE of Fire Island Inlet to 6 nm SW of Buoy 44025 to 17 nm E of Shark River Reef, moving E at 20 kt. These thunderstorms will be near... Buoy 44025 around 1025 AM EDT. Moriches Inlet around 1050 AM EDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners in the path of these storms can expect gusty winds to around 30 knots, locally higher seas, and lightning strikes. && LAT...LON 4019 7339 4051 7317 4066 7310 4074 7288 4074 7285 4075 7286 4074 7284 4075 7284 4074 7283 4082 7259 4085 7245 4056 7256 4026 7276 4007 7282 4003 7342 $$ Goodman  253 FZUS71 KLWX 201421 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 1021 AM EDT Mon Apr 20 2026 ANZ535-201545- /O.CON.KLWX.MA.W.0047.000000T0000Z-260420T1545Z/ 1021 AM EDT Mon Apr 20 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 1145 AM EDT... For the following areas... Tidal Potomac from Key Bridge to Indian Head MD... At 1021 AM EDT, showers were located along a line extending from 14 nm northwest of Key Bridge to 16 nm west of Tidal Basin to 19 nm west of Alexandria, moving east at 20 knots. HAZARD...Wind gusts 34 knots or greater and small hail. SOURCE...Observed wind and hail. IMPACT...Boaters in small craft could be thrown overboard by suddenly higher winds and waves capsizing their vessel. Locations impacted include... Tidal Basin, Fort Washington, Reagan National Airport, Gunston Hall, Woodrow Wilson Bridge, Key Bridge, Fort Hunt, National Harbor, and Alexandria. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor immediately as gusty winds and high waves are expected. && 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 1421Z 291DEG 22KT 3906 7730 3899 7737 3893 7747 HAIL...<.75IN WIND...>34KTS $$ DHOF  690 FZUS71 KOKX 201427 MWSOKX Marine Weather Statement National Weather Service New York NY 1027 AM EDT Mon Apr 20 2026 ANZ331-340-201530- 1027 AM EDT Mon Apr 20 2026 ...THUNDERSTORM APPROACHING PECONIC BAY AND NEARBY EASTERN LONG ISLAND SOUND... The areas affected include... Long Island Sound E of New Haven CT AND Port Jefferson NY to the Mouth of the Connecticut River... Peconic and Gardiners Bays... At 1025 AM EDT, Doppler radar indicated a developing thunderstorm capable of producing winds up to 30 kt. This thunderstorm was located near Mattituck Inlet, moving NE at 15 kt. The thunderstorm will be near... Great Peconic Bay and Mattituck Inlet around 1030 AM EDT. Little Peconic Bay around 1040 AM EDT. Horton Point around 1045 AM EDT. Shelter Island Sound around 1050 AM EDT. Shelter Island around 1055 AM EDT. Dering Harbor around 1100 AM EDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters in the path of this storm should consider seeking safe harbor. && LAT...LON 4117 7228 4101 7220 4101 7221 4102 7223 4099 7225 4098 7227 4099 7231 4095 7243 4092 7244 4089 7253 4091 7265 4095 7263 4095 7258 4100 7257 4097 7264 4097 7266 4100 7267 $$ Goodman  483 WHUS51 KLWX 201447 SMWLWX ANZ536-201545- /O.NEW.KLWX.MA.W.0048.260420T1447Z-260420T1545Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Baltimore MD/Washington DC 1047 AM EDT Mon Apr 20 2026 The National Weather Service in Sterling Virginia has issued a * Special Marine Warning for... Tidal Potomac from Indian Head to Cobb Island MD... * Until 1145 AM EDT. * At 1047 AM EDT, gust fronts were located along a line extending from 8 nm northwest of Mason Neck State Park to 12 nm northwest of Leesylvania State Park to 20 nm west of Quantico, 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... 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 1447Z 297DEG 25KT 3877 7730 3868 7748 3862 7770 HAIL...0.00IN WIND...>34KTS $$ DHOF  373 FZUS71 KOKX 201458 MWSOKX Marine Weather Statement National Weather Service New York NY 1058 AM EDT Mon Apr 20 2026 ANZ345-353-201545- 1058 AM EDT Mon Apr 20 2026 ...THUNDERSTORM NEAR THE GREAT SOUTH BAY... The areas affected include... Long Island South Shore Bays... Fire Island Inlet to Moriches Inlet NY out 20 nm... At 1057 AM EDT, Doppler radar indicated a thunderstorm near the Great South Bay, moving E at 25 kt. Locations impacted include... Great South Bay and Moriches Inlet. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect brief heavy rain and lightning strikes. && LAT...LON 4081 7275 4068 7274 4064 7326 4072 7327 4074 7323 4073 7318 4076 7315 4073 7310 4074 7305 4078 7302 4076 7295 4081 7289 4076 7287 4077 7284 4081 7284 $$ Goodman