Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
226 PM EST Mon Dec 8 2025
LHZ345>347-LSZ321-322-090330-
/O.CON.KAPX.SC.Y.0121.251208T2200Z-251209T1500Z/
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-
Whitefish Bay (U.S. Portion)/Whitefish Point to Point Iroquois MI-
St. Marys River Point Iroquois to E. Potagannissing Bay-
226 PM EST Mon Dec 8 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 AM EST
TUESDAY...
* WHAT...Highest gusts up to 30 kts from the south and highest
waves around 7 feet expected.
* WHERE...In Lake Huron, Straits of Mackinac within 5 nm of
Mackinac Bridge including Mackinac Island, St Ignace to False
Detour Channel and 5NM East of Mackinac Bridge to Presque Isle
Light MI including Bois Blanc Island. In Lake Superior,
Whitefish Bay (U. S. Portion)/Whitefish Point to Point
Iroquois MI and St. Marys River Point Iroquois to E.
Potagannissing Bay.
* WHEN...Until 10 AM EST 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.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
226 PM EST Mon Dec 8 2025
LHZ348-349-090330-
/O.CON.KAPX.SC.Y.0121.251208T2200Z-251209T2100Z/
Presque Isle Light to Sturgeon Pt MI Including Thunder Bay
National Marine Sanctuary-Sturgeon Pt to Alabaster MI-
226 PM EST Mon Dec 8 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST
TUESDAY...
* WHAT...Highest gusts up to 30 kts from the southwest and
highest waves around 8 feet expected.
* WHERE...Presque Isle Light to Sturgeon Pt MI Including Thunder
Bay National Marine Sanctuary and Sturgeon Pt to Alabaster MI.
* WHEN...Until 4 PM EST Tuesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
313 PM CST Mon Dec 8 2025
LMZ521-522-090515-
/O.CON.KGRB.SC.Y.0094.251209T0000Z-251209T1200Z/
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-
313 PM CST Mon Dec 8 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM CST
TUESDAY...
* WHAT...Southwest winds 15 to 25 kts with gusts to around 30 kts
and waves 3 to 5 ft expected.
* WHERE...Central and Southern Bay of Green Bay.
* WHEN...Until 6 AM CST 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.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
313 PM CST Mon Dec 8 2025
LMZ541>543-090515-
/O.CON.KGRB.SC.Y.0094.251209T0000Z-251209T2100Z/
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
313 PM CST Mon Dec 8 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 3 PM CST
TUESDAY...
* WHAT...Southwest winds 15 to 25 kts with gusts to around 30 kts,
becoming west and decreasing to 10 to 20 kts on Tuesday. Waves
6 to 10 ft expected.
* WHERE...Lake Michigan nearshore waters from Washington Island
to Sheboygan.
* WHEN...Until 3 PM CST Tuesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
Kieckbusch
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
402 PM EST Mon Dec 8 2025
LMZ221-090915-
/O.CON.KMQT.SC.Y.0196.251208T2300Z-251209T1400Z/
Green Bay North of line from Cedar River MI to Rock Island
Passage-
402 PM EST Mon Dec 8 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 9 AM EST
TUESDAY...
* WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt and
waves 4 to 7 ft expected.
* WHERE...Green Bay North of line from Cedar River MI to Rock
Island Passage.
* WHEN...Until 9 AM EST 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.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
402 PM EST Mon Dec 8 2025
LMZ248-250-090915-
/O.CON.KMQT.SC.Y.0196.251208T2200Z-251209T1800Z/
Seul Choix Point to Point Detour MI-
5NM East of a line from Fairport MI to Rock Island Passage-
402 PM EST Mon Dec 8 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST
TUESDAY...
* WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt and
waves 6 to 9 ft expected.
* WHERE...Seul Choix Point to Point Detour MI and 5NM East of a
line from Fairport MI to Rock Island Passage.
* WHEN...Until 1 PM EST Tuesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
402 PM EST Mon Dec 8 2025
LSZ249>251-090915-
/O.CON.KMQT.SC.Y.0196.251208T2200Z-251209T1200Z/
Marquette to Munising MI-Munising to Grand Marais MI-
Grand Marais to Whitefish Point MI-
402 PM EST Mon Dec 8 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 AM EST
TUESDAY...
* WHAT...Southwest winds 15 to 20 kt with gusts up to 30 kt and
waves 1 to 3 ft expected.
* WHERE...Marquette to Munising MI, Munising to Grand Marais MI
and Grand Marais to Whitefish Point MI.
* WHEN...Until 7 AM EST 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.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Detroit/Pontiac MI
346 PM EST Mon Dec 8 2025
LHZ421-422-441>443-090930-
/O.NEW.KDTX.SC.Y.0094.251209T0900Z-251211T0900Z/
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner
Saginaw Bay-Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI-
Port Sanilac to Port Huron MI-
346 PM EST Mon Dec 8 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM TUESDAY TO 4 AM EST
THURSDAY...
* WHAT...Expect sustained winds up to 29 knots from the
southwest with gusts up to 33 knots. The largest significant
waves will be 8 feet with a potential maximum wave height of
11 feet.
* WHERE...Outer Saginaw Bay SW of Alabaster to Port Austin MI to
Inner Saginaw Bay, Inner Saginaw Bay SW of Point Au Gres to
Bay Port MI, Port Austin to Harbor Beach MI, Harbor Beach to
Port Sanilac MI and Port Sanilac to Port Huron MI.
* WHEN...The maximum winds are expected around 7 PM EST
Wednesday with the largest waves expected around 7 PM EST
Wednesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Grand Rapids MI
337 PM EST Mon Dec 8 2025
LMZ847-848-090445-
/O.EXT.KGRR.SC.Y.0108.251208T2100Z-251210T0300Z/
/O.NEW.KGRR.GL.A.0015.251210T0300Z-251211T0000Z/
Grand Haven to Whitehall MI-Whitehall to Pentwater MI-
337 PM EST Mon Dec 8 2025
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 PM EST TUESDAY...
...GALE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY
EVENING...
* WHAT...For the Small Craft Advisory, southwest winds 15 to 25
knots with gusts up to 30 knots and waves 7 to 10 feet
expected. For the Gale Watch, northwest winds 20 to 30 knots
with gusts up to 35 knots and waves 7 to 10 feet possible.
* WHERE...Grand Haven to Pentwater.
* WHEN...For the Small Craft Advisory, until 10 PM EST Tuesday.
For the Gale Watch, from Tuesday evening 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.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Grand Rapids MI
337 PM EST Mon Dec 8 2025
LMZ849-090445-
/O.CON.KGRR.GL.W.0030.251209T0400Z-251209T1200Z/
/O.EXB.KGRR.SC.Y.0108.251209T1200Z-251210T0300Z/
/O.NEW.KGRR.GL.A.0015.251210T0300Z-251211T0000Z/
Pentwater to Manistee MI-
337 PM EST Mon Dec 8 2025
...GALE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 7 AM
EST TUESDAY...
...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM TO 10 PM EST
TUESDAY...
...GALE WATCH IN EFFECT FROM TUESDAY EVENING THROUGH WEDNESDAY
EVENING...
* WHAT...For the Gale Warning, south winds 20 to 25 knots with
gusts up to 35 knots and waves 6 to 9 feet expected. For the
Small Craft Advisory, southwest winds 15 to 25 knots with gusts
up to 30 knots and waves 6 to 9 feet expected. For the Gale
Watch, north winds 20 to 30 knots with gusts up to 35 knots and
waves 5 to 8 feet possible.
* WHERE...Pentwater to Manistee MI.
* WHEN...For the Gale Warning, from 11 PM this evening to 7 AM
EST Tuesday. For the Small Craft Advisory, from 7 AM to 10 PM
EST Tuesday. For the Gale Watch, from Tuesday evening through
Wednesday evening.
* IMPACTS...Strong winds will cause hazardous waves which could
capsize or damage vessels and reduce visibility.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
223 PM CST Mon Dec 8 2025
LMZ643>646-090430-
/O.CON.KMKX.SC.Y.0108.251209T0100Z-251209T1800Z/
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-
223 PM CST Mon Dec 8 2025
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO NOON CST TUESDAY...
* WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt
expected. Waves 3 to 6 feet.
* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.
* WHEN...From 7 PM this evening to noon CST 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.
&&
$$
