Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
337 AM EDT Mon Mar 31 2025
LMZ323-341-342-344>346-311545-
/O.CON.KAPX.SC.Y.0041.000000T0000Z-250401T0000Z/
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-
337 AM EDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...
* WHAT...Highest gusts up to 30 kts from the north and highest
waves around 7 feet.
* WHERE...Portions of Lake Michigan.
* WHEN...Until 8 PM EDT this evening.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
337 AM EDT Mon Mar 31 2025
LSZ321-322-311545-
/O.CON.KAPX.SC.Y.0041.000000T0000Z-250401T0000Z/
Whitefish Bay (U.S. Portion)/Whitefish Point to Point Iroquois MI-
St. Marys River Point Iroquois to E. Potagannissing Bay-
337 AM EDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...
* WHAT...Highest gusts up to 30 kts from the northwest and
highest waves around 5 feet.
* WHERE...Whitefish Bay (U. S. Portion)/Whitefish Point to Point
Iroquois MI and St. Marys River Point Iroquois to E.
Potagannissing Bay.
* WHEN...Until 8 PM EDT this evening.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
337 AM EDT Mon Mar 31 2025
LHZ345>349-311545-
/O.CON.KAPX.SC.Y.0041.000000T0000Z-250401T0000Z/
Straits of Mackinac within 5 nm of Mackinac Bridge including
Mackinac Island-St Ignace to False Detour Channel-
5NM East of Mackinac Bridge to Presque Isle Light MI including
Bois Blanc Island-
Presque Isle Light to Sturgeon Pt MI Including Thunder Bay
National Marine Sanctuary-Sturgeon Pt to Alabaster MI-
337 AM EDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...
* WHAT...Highest gusts up to 30 kts from the northwest and
highest waves around 7 feet.
* WHERE...Straits of Mackinac within 5 nm of Mackinac Bridge
including Mackinac Island, St Ignace to False Detour Channel,
5NM East of Mackinac Bridge to Presque Isle Light MI including
Bois Blanc Island, Presque Isle Light to Sturgeon Pt MI
Including Thunder Bay National Marine Sanctuary and Sturgeon
Pt to Alabaster MI.
* WHEN...Until 8 PM EDT this evening.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
Dippman
URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
359 AM CDT Mon Mar 31 2025
LMZ643>646-311700-
/O.CON.KMKX.SC.Y.0045.000000T0000Z-250331T1800Z/
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
359 AM CDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THIS
AFTERNOON...
* WHAT...Northwest winds 10 to 20 kt with gusts up to 25 kt and
waves 3 to 6 feet.
* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
355 AM CDT Mon Mar 31 2025
LMZ521-522-311700-
/O.CON.KGRB.SC.Y.0036.000000T0000Z-250331T1800Z/
Green Bay south of line from Cedar River to Rock Island Passage
and north of a line from Oconto WI to Little Sturgeon Bay WI-
Green Bay south of line from Oconto WI to Little Sturgeon Bay WI-
355 AM CDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM CDT THIS
AFTERNOON...
* WHAT...North winds 10 to 15 kt with gusts up to 25 kt and waves
3 to 5 ft.
* WHERE...Central and Southern Bay of Green Bay.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
355 AM CDT Mon Mar 31 2025
LMZ541>543-311700-
/O.EXT.KGRB.SC.Y.0036.000000T0000Z-250331T1800Z/
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
355 AM CDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 1 PM CDT THIS
AFTERNOON...
* WHAT...North winds 15 to 20 kt with gusts up to 25 kt and waves
3 to 5 ft.
* WHERE...Lake Michigan nearshore waters from Washington Island
to Sheboygan.
* WHEN...Until 1 PM CDT this afternoon.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Mon Mar 31 2025
LMZ221-311615-
/O.CON.KMQT.SC.Y.0069.000000T0000Z-250331T1800Z/
Green Bay North of line from Cedar River MI to Rock Island
Passage-
415 AM EDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...
* WHAT...North winds 15 to 20 kt with gusts up to 30 kt and
waves 1 to 4 ft occurring.
* WHERE...Green Bay North of line from Cedar River MI to Rock
Island Passage.
* WHEN...Until 2 PM EDT this afternoon.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Mon Mar 31 2025
LMZ248-250-311615-
/O.CON.KMQT.SC.Y.0069.000000T0000Z-250401T0000Z/
Seul Choix Point to Point Detour MI-
5NM East of a line from Fairport MI to Rock Island Passage-
415 AM EDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...
* WHAT...Northwest to north winds 15 to 20 kt with gusts up to 30
kt and waves 1 to 3 ft occurring.
* WHERE...Seul Choix Point to Point Detour MI and 5NM East of a
line from Fairport MI to Rock Island Passage.
* WHEN...Until 8 PM EDT this evening.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Mon Mar 31 2025
LSZ251-311615-
/O.CON.KMQT.SC.Y.0069.000000T0000Z-250401T1000Z/
/O.NEW.KMQT.GL.A.0014.250402T0900Z-250403T0300Z/
Grand Marais to Whitefish Point MI-
415 AM EDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT
TUESDAY...
...GALE WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY
EVENING...
* WHAT...For the Small Craft Advisory, northwest to north winds
15 to 25 kt with gusts up to 30 kt and waves 6 to 9 ft
occurring. For the Gale Watch, southeast winds 20 to 30 kt with
gusts up to 40 kt and waves 4 to 7 ft possible.
* WHERE...Grand Marais to Whitefish Point MI.
* WHEN...For the Small Craft Advisory, until 6 AM EDT Tuesday.
For the Gale Watch, from late Tuesday night through Wednesday
evening.
* IMPACTS...Strong winds can cause hazardous waves which could
capsize or damage vessels and reduce visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Mariners should consider altering plans to avoid possible
hazardous conditions. Remain in port, seek safe harbor, alter
course, and/or secure the vessel for severe wind and waves.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Mon Mar 31 2025
LSZ248-311615-
/O.CON.KMQT.SC.Y.0069.000000T0000Z-250331T2200Z/
Huron Islands to Marquette MI-
415 AM EDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT THIS
EVENING...
* WHAT...Northwest to north winds 15 to 25 kt with gusts up to 30
kt and waves 7 to 10 ft occurring.
* WHERE...Huron Islands to Marquette MI.
* WHEN...Until 6 PM EDT this evening.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Mon Mar 31 2025
LSZ249-250-311615-
/O.CON.KMQT.SC.Y.0069.000000T0000Z-250401T1000Z/
Marquette to Munising MI-Munising to Grand Marais MI-
415 AM EDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT
TUESDAY...
* WHAT...Northwest to north winds 15 to 25 kt with gusts up to 30
kt and waves 6 to 11 ft occurring.
* WHERE...Marquette to Munising MI and Munising to Grand Marais
MI.
* WHEN...Until 6 AM EDT Tuesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Detroit/Pontiac MI
409 AM EDT Mon Mar 31 2025
LHZ421-441-312015-
/O.CON.KDTX.SC.Y.0026.250331T1200Z-250401T2000Z/
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-Port Austin to Harbor Beach MI-
409 AM EDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM THIS MORNING
TO 4 PM EDT TUESDAY...
* WHAT...Expect sustained winds up to 22 knots from the north
with gusts up to 28 knots. The largest significant waves will
be 6 feet with a potential maximum wave height of 8 feet.
* WHERE...Outer Saginaw Bay SW of Alabaster to Port Austin MI to
Inner Saginaw Bay and Port Austin to Harbor Beach MI.
* WHEN...The maximum winds are expected around 10 PM EDT Monday
with the largest waves expected around 11 PM EDT Monday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Detroit/Pontiac MI
409 AM EDT Mon Mar 31 2025
LHZ442-443-312015-
/O.CON.KDTX.SC.Y.0026.250331T1800Z-250401T2000Z/
Harbor Beach to Port Sanilac MI-Port Sanilac to Port Huron MI-
409 AM EDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 PM THIS
AFTERNOON TO 4 PM EDT TUESDAY...
* WHAT...Expect sustained winds up to 19 knots from the north
with gusts up to 24 knots. The largest significant waves will
be 5 feet with a potential maximum wave height of 7 feet.
* WHERE...Harbor Beach to Port Sanilac MI and Port Sanilac to
Port Huron MI.
* WHEN...The maximum winds are expected around 10 PM EDT Monday
with the largest waves expected around 11 PM EDT Monday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Grand Rapids MI
356 AM EDT Mon Mar 31 2025
LMZ844>849-311600-
/O.CON.KGRR.SC.Y.0038.000000T0000Z-250401T0600Z/
St Joseph to South Haven MI-South Haven to Holland MI-
Holland to Grand Haven MI-Grand Haven to Whitehall MI-
Whitehall to Pentwater MI-Pentwater to Manistee MI-
356 AM EDT Mon Mar 31 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT
TUESDAY...
* WHAT...North winds 15 to 25 knots with gusts up to 30 knots
and waves 4 to 7 feet.
* WHERE...St Joseph to Manistee.
* WHEN...Until 2 AM EDT Tuesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
