FZUS71 KBOX 212034 MWSBOX Marine Weather Statement National Weather Service Boston/Norton MA 434 PM EDT Sun Jun 21 2026 ANZ230-250-251-212130- 434 PM EDT Sun Jun 21 2026 ...A STRONG THUNDERSTORM OVER THE WATERS... The areas affected include... Boston Harbor... Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary... Massachusetts Bay and Ipswich Bay... At 434 PM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots and small hail. This thunderstorm was located over Minot Light, moving southeast at 25 knots. Locations impacted include... Boston Harbor, Boston Buoy 44013, Boston Light, Broad Sound, Quincy Harbor, Scituate Harbor, and Minot Light. 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 4219 7032 4209 7036 4206 7057 4216 7074 4221 7072 4226 7077 4224 7077 4227 7085 4224 7097 4228 7095 4226 7099 4231 7105 4233 7101 4236 7105 4238 7101 4238 7099 4237 7097 4245 7096 4249 7087 $$ as