659 FZUS71 KBOX 211901 MWSBOX Marine Weather Statement National Weather Service Boston/Norton MA 301 PM EDT Sun Jun 21 2026 ANZ250-280-212000- 301 PM EDT Sun Jun 21 2026 ...A STRONG THUNDERSTORM OVER THE WATERS... The areas affected include... Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary... Ocean Waters from the Merrimack River to Plymouth from 40 to 60 NM... At 300 PM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots and small hail. This thunderstorm was located 9 nm southeast of Portsmouth, moving east at 25 knots. Locations impacted include... Jeffreys Ledge Buoy 44098. PRECAUTIONARY/PREPAREDNESS ACTIONS... Expect gusty winds to around 30 knots...briefly rough seas and lightning strikes. Consider heading for safe harbor until this storm passes. This a strong thunderstorm will produce winds to around 30 knots... and could pose a serious hazard for boaters. A Special Marine Warning may be issued when this storm reaches the nearshore waters. Boaters should consider heading for shore before the storm arrives. && LAT...LON 4267 7003 4283 7052 4288 6993 $$ AS 183 FZUS72 KJAX 211918 MWSJAX Marine Weather Statement National Weather Service Jacksonville FL 318 PM EDT Sun Jun 21 2026 AMZ450-452-212015- 318 PM EDT Sun Jun 21 2026 ...STRONG THUNDERSTORMS APPROACHING THE WATERS... The areas affected include... Coastal waters from Altamaha Sound to Fernandina Beach FL out 20 NM... Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM... At 317 PM EDT, Doppler radar indicated strong thunderstorms, capable of producing winds to around 30 knots. These thunderstorms were located 26 nm west of Amelia City, or 40 nm southwest of St. Simons Island, moving east at 25 knots. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect gusty winds to around 30 knots, locally higher waves, and lightning strikes. Boaters should seek safe harbor immediately until this storm passes. && LAT...LON 3130 8142 3128 8138 3130 8137 3130 8133 3129 8133 3128 8132 3128 8124 3124 8094 3096 8107 3086 8108 3076 8110 3070 8109 3060 8110 3048 8108 3044 8149 3051 8151 3130 8147 $$ DUBOIS 262 FZUS72 KJAX 211923 MWSJAX Marine Weather Statement National Weather Service Jacksonville FL 323 PM EDT Sun Jun 21 2026 AMZ452-454-212030- 323 PM EDT Sun Jun 21 2026 ...STRONG THUNDERSTORMS APPROACHING THE WATERS... The areas affected include... Coastal waters from Fernandina Beach to St. Augustine FL out 20 NM... Coastal waters from St. Augustine to Flagler Beach FL out 20 NM... At 322 PM EDT, Doppler radar indicated strong thunderstorms, capable of producing winds to around 30 knots. These thunderstorms were located over Palm Coast, moving northeast 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 2946 8116 2953 8120 2955 8124 2963 8125 2965 8128 2973 8128 2978 8132 2992 8136 3044 8149 3050 8108 3036 8106 2988 8093 2949 8076 $$ DUBOIS 983 FZUS72 KMLB 211934 MWSMLB Marine Weather Statement National Weather Service Melbourne FL 334 PM EDT Sun Jun 21 2026 AMZ550-552-212030- 334 PM EDT Sun Jun 21 2026 ...A STRONG THUNDERSTORM APPROACHING THE WATERS... The areas affected include... Flagler Beach to Volusia-Brevard County Line 0-20 nm... Volusia-Brevard County Line to Sebastian Inlet 0-20 nm... At 334 PM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots. This thunderstorm was located over Port Orange, moving east at 15 knots. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners can expect gusty winds to around 30 knots, locally higher waves, lightning strikes, and heavy downpours. Boaters should seek safe harbor immediately until this storm passes. Waterspouts are possible with this activity. Remain on the alert in case warnings are issued for waterspout development. Frequent cloud to water lightning is occurring with this storm. If caught on the open water stay below deck and, if possible, avoid ungrounded metal objects. Remember, lightning can strike beyond 10 miles away from a thunderstorm. && LAT...LON 2925 8065 2831 8045 2831 8073 2880 8089 2884 8085 2923 8105 $$ Tollefsen