013 WHUS51 KPHI 201610 SMWPHI ANZ483-485-201715- /O.NEW.KPHI.MA.W.0020.260420T1610Z-260420T1715Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Mount Holly NJ 1210 PM EDT Mon Apr 20 2026 The National Weather Service in Mount Holly NJ has issued a * Special Marine Warning for... Outer waters from Great Egg Inlet NJ to Fenwick Island DE from 20 to 60 nm... * Until 115 PM EDT. * At 1210 PM EDT, a severe thunderstorm capable of producing waterspouts was located 20 nm southeast of Five Fathoms Buoy, moving east at 15 knots. HAZARD...Waterspouts and wind gusts 34 knots or greater. SOURCE...Radar. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Small craft could be damaged in briefly higher winds and suddenly higher waves. * The severe thunderstorm will remain over mainly open waters. 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 3857 7429 3874 7423 3871 7374 3835 7388 TIME...MOT...LOC 1610Z 287DEG 13KT 3860 7421 WATERSPOUT...POSSIBLE HAIL...0.00IN WIND...>34KTS $$ Robertson  755 FZUS71 KPHI 201620 MWSPHI Marine Weather Statement National Weather Service Mount Holly NJ 1220 PM EDT Mon Apr 20 2026 ANZ455-485-201645- /O.CON.KPHI.MA.W.0019.000000T0000Z-260420T1645Z/ 1220 PM EDT Mon Apr 20 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 1245 PM EDT... For the following areas... Coastal waters from Cape Henlopen to Fenwick Island DE out 20 NM... Waters from Cape May NJ to Fenwick Island DE from 20 to 60 NM... At 1220 PM EDT, a cluster of severe thunderstorms capable of producing waterspouts was located near Delaware Lightship Buoy 44009, moving southeast at 20 knots. HAZARD...Waterspouts and wind gusts 34 knots or greater. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Small craft could be damaged in briefly higher winds and suddenly higher waves. Locations impacted include... Delaware Lightship Buoy 44009. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor immediately as gusty winds and high waves are expected. Thunderstorms can produce sudden waterspouts. Waterspouts can easily overturn boats and create locally hazardous seas. Seek safe harbor immediately. && LAT...LON 3838 7480 3856 7466 3857 7426 3822 7427 3830 7455 TIME...MOT...LOC 1620Z 295DEG 18KT 3837 7468 WATERSPOUT...POSSIBLE HAIL...0.00IN WIND...>34KTS $$ Robertson  641 FZUS71 KPHI 201641 MWSPHI Marine Weather Statement National Weather Service Mount Holly NJ 1241 PM EDT Mon Apr 20 2026 ANZ483-485-201715- /O.CON.KPHI.MA.W.0020.000000T0000Z-260420T1715Z/ 1241 PM EDT Mon Apr 20 2026 ...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 115 PM EDT... For the following areas... Waters from Cape May NJ to Fenwick Island DE from 20 to 60 NM... Waters from Great Egg Inlet NJ to Cape May NJ from 20 to 60 NM... At 1241 PM EDT, a severe thunderstorm capable of producing waterspouts was located 25 nm southeast of Deepwater Reef, moving east at 20 knots. HAZARD...Waterspouts and wind gusts 34 knots or greater. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Small craft could be damaged in briefly higher winds and suddenly higher waves. The severe thunderstorm will remain over mainly open waters. 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 3856 7428 3869 7403 3870 7375 3835 7388 TIME...MOT...LOC 1641Z 274DEG 22KT 3860 7395 WATERSPOUT...POSSIBLE HAIL...0.00IN WIND...>34KTS $$ Robertson  955 FZUS71 KPHI 201651 MWSPHI Marine Weather Statement National Weather Service Mount Holly NJ 1251 PM EDT Mon Apr 20 2026 ANZ483-485-201701- /O.CAN.KPHI.MA.W.0020.000000T0000Z-260420T1715Z/ 1251 PM EDT Mon Apr 20 2026 ...THE SPECIAL MARINE WARNING IS CANCELLED... The affected areas were... Outer waters from Great Egg Inlet NJ to Fenwick Island DE from 20 to 60 nm... The thunderstorm has weakened and no longer poses a significant threat to boaters. LAT...LON 3856 7428 3869 7403 3870 7375 3835 7388 TIME...MOT...LOC 1649Z 287DEG 13KT 3859 7391 $$ Robertson  118 FZUS71 KLWX 201651 MWSLWX Marine Weather Statement National Weather Service Baltimore MD/Washington DC 1251 PM EDT Mon Apr 20 2026 ANZ532-533-540>542-201701- /O.EXP.KLWX.MA.W.0049.000000T0000Z-260420T1700Z/ 1251 PM EDT Mon Apr 20 2026 ...THE SPECIAL MARINE WARNING WILL EXPIRE AT 100 PM EDT... The affected areas were... 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... The thunderstorms have moved out of the area and no longer pose a significant threat to boaters. && 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 1651Z 277DEG 28KT 3880 7592 3866 7603 3856 7621 $$ BRO