434 

FZUS71 KBOX 300523

MWSBOX



Marine Weather Statement

National Weather Service Boston/Norton MA

123 AM EDT Sat May 30 2026



ANZ231-254-300630-

123 AM EDT Sat May 30 2026



...A STRONG THUNDERSTORM APPROACHING THE WATERS...



The areas affected include...

  Cape Cod Bay...

  Coastal waters from Provincetown MA to Chatham MA to Nantucket MA 

  out 20 NM...



At 122 AM EDT, Doppler radar indicated a strong thunderstorm, capable

of producing winds to around 30 knots and small hail. This

thunderstorm was located near Cape Cod Bay, moving east at 35 knots.



Locations impacted include...

Cape Cod Bay, Wellfleet Harbor, Nauset Light, The Coastal Waters East

Of Cape Cod, Barnstable Harbor, and North Eastham.



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.



&&



LAT...LON 4175 6993 4189 6997 4188 7001 4180 7001

      4172 7025 4171 7026 4172 7035 4173 7027

      4174 7030 4175 7044 4193 7052 4200 7008

      4194 7008 4190 7000 4191 6997 4201 7003

      4208 6954 4182 6947



$$



CAM






296 

FZUS71 KBOX 300524

MWSBOX



Marine Weather Statement

National Weather Service Boston/Norton MA

124 AM EDT Sat May 30 2026



ANZ232-254-255-281-300533-

/O.CAN.KBOX.MA.W.0005.000000T0000Z-260530T0600Z/

124 AM EDT Sat May 30 2026



...THE SPECIAL MARINE WARNING IS CANCELLED...



The affected areas were... 

Coastal Waters extending out to 25 NM South of Marthas Vineyard and

Nantucket...

Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out

20 NM...

Nantucket Sound...

Ocean Waters from Provincetown to Nantucket from 20 to 60 NM...



The thunderstorm has weakened and no longer poses a significant 

threat to boaters. However, expect lightning with the weaker 

remaining thunderstorms. 



LAT...LON 4112 7033 4128 7037 4146 6932 4120 6929

TIME...MOT...LOC 0520Z 261DEG 45KT 4128 6979 



$$



CAM






233 

FZUS71 KBOX 300554

MWSBOX



Marine Weather Statement

National Weather Service Boston/Norton MA

154 AM EDT Sat May 30 2026



ANZ231-250-251-254-300700-

154 AM EDT Sat May 30 2026



...STRONG THUNDERSTORMS APPROACHING THE WATERS...



The areas affected include...

  Cape Cod Bay...

  Coastal waters east of Ipswich Bay and the Stellwagen Bank 

  National Marine Sanctuary...

  Coastal waters from Provincetown MA to Chatham MA to Nantucket MA 

  out 20 NM...

  Massachusetts Bay and Ipswich Bay...



At 154 AM EDT, Doppler radar indicated strong thunderstorms, capable

of producing winds to around 30 knots. These thunderstorms were

located along a line extending from near Ipswich to near Manomet

Point, moving northeast at 25 knots.



Locations impacted include...

Eastern Point Ma, The Coastal Waters East Of Cape Ann, Boston Buoy

44013, Mass Bay Buoy 44029, Stellwagen Bank, Ipswich Bay, Race Point,

Thatcher Island, The Coastal Waters East Of Boston Harbor, Essex Bay,

and Plum Island.



PRECAUTIONARY/PREPAREDNESS ACTIONS...



Expect gusty winds to around 30 knots...briefly rough seas and

lightning strikes. Consider heading for safe harbor until these

storms pass.



&&



LAT...LON 4205 6986 4208 7022 4207 7023 4206 7011

      4202 7008 4191 7052 4256 7082 4265 7059

      4269 7063 4262 7069 4264 7077 4269 7078

      4266 7084 4266 7085 4270 7079 4276 7087

      4270 7078 4280 7080 4286 7025



$$



CAM