URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
1236 PM CDT Mon May 4 2026
LMZ261-362-364-563-042100-
/O.CON.KMKX.GL.W.0025.000000T0000Z-260504T2100Z/
Lake Michigan from Seul Choix Point to Rock Island Passage 5NM
offshore to Mid Lake-
Lake Michigan South of a line from Seul Choix Point to the
Mackinac Bridge and North of a line from Charlevoix MI to South
Fox Island 5NM offshore-
Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to
mid lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM
offshore to mid lake-
1236 PM CDT Mon May 4 2026
...GALE WARNING REMAINS IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON...
* WHAT...Southwest winds 20 to 25 kt with gusts up to 35 kt and
waves 4 to 7 ft expected.
* WHERE...Northern Third of the Open Waters of Lake Michigan.
* WHEN...From 10 AM this morning to 4 PM CDT this afternoon.
* IMPACTS...Strong winds will cause hazardous waves which could
capsize or damage vessels and reduce visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for severe conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
103 PM EDT Mon May 4 2026
ANZ231>234-050615-
/O.CON.KBOX.GL.W.0015.000000T0000Z-260504T2300Z/
/O.NEW.KBOX.GL.W.0016.260505T1500Z-260506T0300Z/
Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay-
103 PM EDT Mon May 4 2026
...GALE WARNING REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING...
...GALE WARNING IN EFFECT FROM 11 AM TO 11 PM EDT TUESDAY...
* WHAT...For the first Gale Warning, southwest winds around 20
kt with gusts up to 40 kt and seas 3 to 5 feet. For the second
Gale Warning, southwest winds 15 to 25 kt with gusts up to 40
kt and seas 3 to 5 feet expected.
* WHERE...Cape Cod Bay, Nantucket Sound, Vineyard Sound and
Buzzards Bay.
* WHEN...For the first Gale Warning, until 7 PM EDT this
evening. For the second Gale Warning, from 11 AM to 11 PM EDT
Tuesday.
* IMPACTS...Strong winds will cause hazardous seas which could
capsize or damage vessels and reduce visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
103 PM EDT Mon May 4 2026
ANZ230-236-050615-
/O.CAN.KBOX.SC.Y.0051.000000T0000Z-260505T0000Z/
/O.NEW.KBOX.GL.W.0016.260505T1500Z-260506T0300Z/
Boston Harbor-Narragansett Bay-
103 PM EDT Mon May 4 2026
...GALE WARNING IN EFFECT FROM 11 AM TO 11 PM EDT TUESDAY...
* WHAT...Southwest winds 15 to 20 kt with gusts up to 40 kt and
waves 2 to 4 feet expected.
* WHERE...In Massachusetts coastal waters, Boston Harbor. In
Rhode Island coastal waters, Narragansett Bay.
* WHEN...From 11 AM to 11 PM EDT Tuesday.
* IMPACTS...Strong winds will cause hazardous waves which could
capsize or damage vessels and reduce visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
103 PM EDT Mon May 4 2026
ANZ235-237-251-050615-
/O.CAN.KBOX.SC.Y.0051.000000T0000Z-260505T0000Z/
/O.NEW.KBOX.GL.W.0016.260505T1500Z-260506T0300Z/
Rhode Island Sound-Block Island Sound-
Massachusetts Bay and Ipswich Bay-
103 PM EDT Mon May 4 2026
...GALE WARNING IN EFFECT FROM 11 AM TO 11 PM EDT TUESDAY...
* WHAT...Southwest winds 15 to 25 kt with gusts up to 40 kt and
seas 4 to 7 feet expected.
* WHERE...In Rhode Island coastal waters, Rhode Island Sound and
Block Island Sound. In Massachusetts coastal waters,
Massachusetts Bay and Ipswich Bay.
* WHEN...From 11 AM to 11 PM EDT Tuesday.
* IMPACTS...Strong winds will cause hazardous seas which could
capsize or damage vessels and reduce visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
959 AM EDT Mon May 4 2026
LHZ345-LMZ323-341-342-344>346-042200-
/O.CON.KAPX.GL.W.0013.260504T1600Z-260504T2300Z/
Straits of Mackinac within 5 nm of Mackinac Bridge including
Mackinac Island-
Grand Traverse Bay south of a line Grand Traverse Light to
Norwood MI-Seul Choix Point to 5NM West of Mackinac Bridge-
Norwood MI to 5NM West of Mackinac Bridge including Little
Traverse Bay-Sleeping Bear Point to Grand Traverse Light MI-
Point Betsie to Sleeping Bear Point MI-
Manistee to Point Betsie MI-
959 AM EDT Mon May 4 2026
...GALE WARNING REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING...
* WHAT...Highest gusts up to 40 kts from the southwest and
highest waves around 7 feet expected.
* WHERE...Portions of Lake Huron and Lake Michigan.
* WHEN...Until 7 PM EDT this evening.
* IMPACTS...Strong winds will cause hazardous highest waves
which could capsize or damage vessels and reduce visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
945 AM EDT Mon May 4 2026
LSZ243-244-050145-
/O.CON.KMQT.SC.Y.0077.000000T0000Z-260504T1600Z/
/O.CON.KMQT.GL.W.0037.260504T1600Z-260505T0000Z/
/O.NEW.KMQT.SC.Y.0078.260505T0000Z-260506T0300Z/
Upper Entrance of Portage Canal to Eagle River MI-
Eagle River to Manitou Island MI-
945 AM EDT Mon May 4 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL NOON EDT TODAY...
...GALE WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 11 PM
EDT TUESDAY...
* WHAT...For the first Small Craft Advisory, southwest winds 20
to 25 kt with gusts up to 30 kt and waves 3 to 6 ft occurring.
For the Gale Warning, west winds 20 to 25 kt with gusts up to
40 kt and waves 6 to 9 ft expected. For the second Small Craft
Advisory, west winds 15 to 25 kt with gusts up to 30 kt and
waves 5 to 8 ft expected.
* WHERE...Upper Entrance of Portage Canal to Eagle River MI and
Eagle River to Manitou Island MI.
* WHEN...For the first Small Craft Advisory, until noon EDT
today. For the Gale Warning, until 8 PM EDT this evening. For
the second Small Craft Advisory, from 8 PM this evening to 11
PM EDT Tuesday.
* IMPACTS...Strong winds will cause hazardous waves which could
capsize or damage vessels and reduce visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
945 AM EDT Mon May 4 2026
LSZ264-266-050000-
/O.CON.KMQT.GL.W.0037.260504T1600Z-260505T0000Z/
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
Lake Superior East of a line from Manitou Island to Marquette MI
and West of a line from Grand Marais MI to the US/Canadian Border
Beyond 5NM from shore-
945 AM EDT Mon May 4 2026
...GALE WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING...
* WHAT...West winds 15 to 25 kt with gusts up to 35 kt and waves
5 to 8 ft expected.
* WHERE...Lake Superior from Upper Entrance to Portage Canal to
Manitou Island MI 5NM off shore to the US/Canadian Border and
Lake Superior East of a line from Manitou Island to Marquette
MI and West of a line from Grand Marais MI to the US/Canadian
Border Beyond 5NM from shore.
* WHEN...Until 8 PM EDT this evening.
* IMPACTS...Strong winds will cause hazardous waves which could
capsize or damage vessels and reduce visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.
&&
$$
Coastal Waters Forecast
National Weather Service Anchorage Alaska
311 AM AKDT Mon May 4 2026
Coastal Waters Forecast for the Northern Gulf of Alaska Coast
up to 100 nm out including Kodiak Island and Cook Inlet.
Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.
PKZ730-050000-
West of Barren Islands Including Kamishak Bay-
311 AM AKDT Mon May 4 2026
...GALE WARNING TODAY...
.TODAY...E wind 35 kt. Seas 9 ft. Rain.
.TONIGHT...E wind 25 kt. Seas 7 ft. Rain.
.TUE...N wind 20 kt in the morning becoming variable 10 kt. Seas
5 ft.
.TUE NIGHT...SW wind 15 kt. Seas 3 ft.
.WED...W wind 25 kt. Seas 5 ft.
.THU...Variable wind 10 kt. Seas 2 ft.
.FRI...NE wind 15 kt. Seas 4 ft.
$$
Coastal Waters Forecast
National Weather Service Anchorage Alaska
311 AM AKDT Mon May 4 2026
Coastal Waters Forecast for the Northern Gulf of Alaska Coast
up to 100 nm out including Kodiak Island and Cook Inlet.
Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.
PKZ731-050000-
Barren Islands East-
311 AM AKDT Mon May 4 2026
...GALE WARNING TODAY...
.TODAY...E wind 35 kt. Seas 9 ft. Patchy fog. Rain.
.TONIGHT...E wind 30 kt. Seas 10 ft. Patchy fog. Rain.
.TUE...S wind 15 kt. Seas 10 ft.
.TUE NIGHT...SW wind 15 kt. Seas 7 ft.
.WED...SW wind 20 kt. Seas 6 ft.
.THU...Variable wind 10 kt. Seas 3 ft.
.FRI...NE wind 20 kt. Seas 8 ft.
$$
Coastal Waters Forecast
National Weather Service Anchorage Alaska
240 AM AKDT Mon May 4 2026
Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.
Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.
PKZ786-042330-
Kiska to Attu Bering Side-
240 AM AKDT Mon May 4 2026
...GALE WARNING TUESDAY...
.TODAY...E wind 25 kt. Seas 15 ft.
.TONIGHT...SE wind 30 kt. Seas 11 ft.
.TUE...SE wind 35 kt. Seas 12 ft.
.TUE NIGHT...SE wind 35 kt. Seas 13 ft.
.WED...SE wind 25 kt. Seas 12 ft.
.THU...SE wind 15 kt. Seas 9 ft.
.FRI...S wind 25 kt. Seas 8 ft.
$$
Coastal Waters Forecast
National Weather Service Anchorage Alaska
240 AM AKDT Mon May 4 2026
Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.
Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.
PKZ787-042330-
Kiska to Attu Pacific Side-
240 AM AKDT Mon May 4 2026
...GALE WARNING TUESDAY...
.TODAY...E wind 25 kt. Seas 18 ft.
.TONIGHT...SE wind 30 kt. Seas 13 ft.
.TUE...SE wind 40 kt. Seas 15 ft. Rain.
.TUE NIGHT...S wind 35 kt. Seas 14 ft.
.WED...S wind 15 kt. Seas 12 ft.
.THU...Variable wind 10 kt. Seas 10 ft.
.FRI...S wind 25 kt. Seas 8 ft.
$$
Coastal Waters Forecast
National Weather Service Anchorage Alaska
240 AM AKDT Mon May 4 2026
Coastal Waters Forecast for Southwest Alaska+Bristol Bay+The
Alaska Peninsula Waters and the Aleutian Islands up to 100 nm out.
Wind forecasts reflect the predominant speed and direction
expected. Sea forecasts represent an average of the highest
one-third of the combined wind wave and swell height.
PKZ764-042330-
Kuskokwim Delta from 15 to 80 NM-
240 AM AKDT Mon May 4 2026
...GALE WARNING TONIGHT...
.TODAY...N wind 30 kt. Seas 8 ft. Snow showers. Freezing spray.
.TONIGHT...N wind 35 kt. Seas 9 ft. Freezing spray.
.TUE...N wind 30 kt. Seas 8 ft.
.TUE NIGHT...NW wind 25 kt. Seas 6 ft.
.WED...NW wind 10 kt. Seas 3 ft.
.THU THROUGH FRI...N wind 20 kt. Seas 4 ft.
$$ | 
