Dense Fog Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Tue May 19 2026
LMZ221-191700-
/O.CON.KMQT.MF.Y.0013.000000T0000Z-260519T1700Z/
Green Bay North of line from Cedar River MI to Rock Island
Passage-
415 AM EDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...
* WHAT...Dense fog will reduce visibility to less than one
nautical mile.
* WHERE...Green Bay North of line from Cedar River MI to Rock
Island Passage.
* WHEN...Until 1 PM EDT this afternoon.
* IMPACTS...Low visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Tue May 19 2026
LMZ248-250-192015-
/O.CON.KMQT.MF.Y.0013.000000T0000Z-260519T1700Z/
/O.CON.KMQT.SC.Y.0086.000000T0000Z-260520T0000Z/
Seul Choix Point to Point Detour MI-
5NM East of a line from Fairport MI to Rock Island Passage-
415 AM EDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...
* WHAT...For the Dense Fog Advisory, dense fog will reduce
visibility to less than one nautical mile. For the Small Craft
Advisory, southwest winds 10 to 20 kt with gusts up to 25 kt
and waves 3 to 6 ft occurring.
* WHERE...Seul Choix Point to Point Detour MI and 5NM East of a
line from Fairport MI to Rock Island Passage.
* WHEN...For the Dense Fog Advisory, until 1 PM EDT this
afternoon. For the Small Craft Advisory, until 8 PM EDT this
evening.
* IMPACTS...Conditions will be hazardous to small craft. Low
visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Tue May 19 2026
LSZ264>266-191500-
/O.CON.KMQT.MF.Y.0011.000000T0000Z-260519T1500Z/
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
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-
415 AM EDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT THIS
MORNING...
* WHAT...Dense fog will reduce visibility to less than one
nautical mile.
* WHERE...Lake Superior from Upper Entrance to Portage Canal to
Manitou Island MI 5NM off shore to the US/Canadian Border,
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore 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 11 AM EDT this morning.
* IMPACTS...Low visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Tue May 19 2026
LSZ267-191800-
/O.CON.KMQT.MF.Y.0011.000000T0000Z-260519T1800Z/
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
415 AM EDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...
* WHAT...Dense fog will reduce visibility to less than one
nautical mile.
* WHERE...Lake Superior from Grand Marais MI to Whitefish Point
MI 5NM off shore to the US/Canadian border.
* WHEN...Until 2 PM EDT this afternoon.
* IMPACTS...Low visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
306 AM CDT Tue May 19 2026
LMZ261-362-364-366-563-565-567-868-191615-
/O.CON.KMKX.MF.Y.0006.000000T0000Z-260519T1700Z/
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 Point Betsie to Manistee MI 5NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM
offshore to mid lake-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid
Lake-
Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid
Lake-
306 AM CDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CDT TODAY...
* WHAT...Dense fog will reduce visibility to less than 1 NM.
* WHERE...Northern Open Waters of Lake Michigan.
* WHEN...Until noon CDT Tuesday.
* IMPACTS...Low visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
234 AM CDT Tue May 19 2026
LMZ521-522-191545-
/O.CON.KGRB.MF.Y.0007.000000T0000Z-260519T1700Z/
/O.CON.KGRB.SC.Y.0053.260519T1500Z-260520T0000Z/
Green Bay south of line from Cedar River to Rock Island Passage
and north of a line from Oconto WI to Little Sturgeon Bay WI-
Green Bay south of line from Oconto WI to Little Sturgeon Bay WI-
234 AM CDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CDT TODAY...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING
TO 7 PM CDT THIS EVENING...
* WHAT...For the Dense Fog Advisory, dense fog will reduce
visibility to less than 1 NM. For the Small Craft Advisory,
west winds 10 to 15 kt with gusts up to 20 kt and waves 1 to 2
ft expected.
* WHERE...Central and Southern Bay of Green Bay.
* WHEN...For the Dense Fog Advisory, until noon CDT today. For
the Small Craft Advisory, from 10 AM this morning to 7 PM CDT
this evening.
* IMPACTS...Conditions will be hazardous to small craft. Low
visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
234 AM CDT Tue May 19 2026
LMZ541>543-191545-
/O.CON.KGRB.MF.Y.0007.000000T0000Z-260519T1700Z/
/O.CON.KGRB.SC.Y.0053.000000T0000Z-260520T0000Z/
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
234 AM CDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CDT TODAY...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...
* WHAT...For the Dense Fog Advisory, dense fog will reduce
visibility to 1/2 NM or less. For the Small Craft Advisory,
southwest winds 10 to 20 kt with gusts up to 25 kt and waves 3
to 6 ft.
* WHERE...Lake Michigan nearshore waters from Washington Island
to Sheboygan.
* WHEN...For the Dense Fog Advisory, until noon CDT today. For
the Small Craft Advisory, until 7 PM CDT this evening.
* IMPACTS...Conditions will be hazardous to small craft. Low
visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Detroit/Pontiac MI
957 PM EDT Mon May 18 2026
LHZ361>363-462>464-191415-
/O.NEW.KDTX.MF.Y.0008.260519T0200Z-260519T2000Z/
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
Lake Huron from Presque Isle Light to Sturgeon Point MI beyond
5NM off shore-
Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off
shore-
Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore-
Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore-
Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore-
957 PM EDT Mon May 18 2026
...DENSE FOG ADVISORY IN EFFECT UNTIL 4 PM EDT TUESDAY...
* WHAT...Dense fog will reduce visibility to less than 1 NM.
* WHERE...Portions of Lake Huron.
* WHEN...Until 4 PM EDT Tuesday.
* IMPACTS...Low visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
Small Craft Advisory
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Tue May 19 2026
LMZ248-250-192015-
/O.CON.KMQT.MF.Y.0013.000000T0000Z-260519T1700Z/
/O.CON.KMQT.SC.Y.0086.000000T0000Z-260520T0000Z/
Seul Choix Point to Point Detour MI-
5NM East of a line from Fairport MI to Rock Island Passage-
415 AM EDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 1 PM EDT THIS
AFTERNOON...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...
* WHAT...For the Dense Fog Advisory, dense fog will reduce
visibility to less than one nautical mile. For the Small Craft
Advisory, southwest winds 10 to 20 kt with gusts up to 25 kt
and waves 3 to 6 ft occurring.
* WHERE...Seul Choix Point to Point Detour MI and 5NM East of a
line from Fairport MI to Rock Island Passage.
* WHEN...For the Dense Fog Advisory, until 1 PM EDT this
afternoon. For the Small Craft Advisory, until 8 PM EDT this
evening.
* IMPACTS...Conditions will be hazardous to small craft. Low
visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Tue May 19 2026
LSZ248-249-192015-
/O.CON.KMQT.MF.Y.0011.000000T0000Z-260519T1200Z/
/O.EXT.KMQT.SC.Y.0086.260519T1400Z-260520T0600Z/
Huron Islands to Marquette MI-Marquette to Munising MI-
415 AM EDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS
MORNING...
...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 10 AM THIS MORNING TO
2 AM EDT WEDNESDAY...
* WHAT...For the Dense Fog Advisory, dense fog will reduce
visibility to less than one nautical mile. For the Small Craft
Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt
and waves 3 to 6 ft expected.
* WHERE...Huron Islands to Marquette MI and Marquette to
Munising MI.
* WHEN...For the Dense Fog Advisory, until 8 AM EDT this
morning. For the Small Craft Advisory, from 10 AM this morning
to 2 AM EDT Wednesday.
* IMPACTS...Conditions will be hazardous to small craft. Low
visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Marquette MI
415 AM EDT Tue May 19 2026
LSZ250-251-192015-
/O.CON.KMQT.MF.Y.0011.000000T0000Z-260519T1200Z/
/O.EXT.KMQT.SC.Y.0086.260519T1100Z-260520T1800Z/
Munising to Grand Marais MI-Grand Marais to Whitefish Point MI-
415 AM EDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THIS
MORNING...
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 PM EDT WEDNESDAY...
* WHAT...For the Dense Fog Advisory, dense fog will reduce
visibility to less than one nautical mile. For the Small Craft
Advisory, northwest winds 15 to 25 kt with gusts up to 30 kt
and waves 5 to 8 ft expected.
* WHERE...Munising to Grand Marais MI and Grand Marais to
Whitefish Point MI.
* WHEN...For the Dense Fog Advisory, until 8 AM EDT this
morning. For the Small Craft Advisory, until 2 PM EDT
Wednesday.
* IMPACTS...Conditions will be hazardous to small craft. Low
visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Grand Rapids MI
409 AM EDT Tue May 19 2026
LMZ846>849-191615-
/O.EXT.KGRR.SC.Y.0034.000000T0000Z-260520T1200Z/
Holland to Grand Haven MI-Grand Haven to Whitehall MI-
Whitehall to Pentwater MI-Pentwater to Manistee MI-
409 AM EDT Tue May 19 2026
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 AM EDT WEDNESDAY...
* WHAT...West winds 10 to 20 knots with gusts up to 30 knots and
waves 4 to 7 feet.
* WHERE...Holland to Manistee.
* WHEN...Until 8 AM EDT Wednesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
306 AM CDT Tue May 19 2026
LMZ643-191615-
/O.CON.KMKX.SC.Y.0055.260519T0900Z-260519T2100Z/
Sheboygan to Port Washington WI-
306 AM CDT Tue May 19 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CDT THIS
AFTERNOON...
* WHAT...Southwest winds 15 to 25 kt with gusts up to 30 kt
expected. Winds veer west to northwest in the afternoon.
* WHERE...Nearshore Waters from Sheboygan to Port Washington.
* WHEN...From 4 AM to 4 PM CDT 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.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
234 AM CDT Tue May 19 2026
LMZ521-522-191545-
/O.CON.KGRB.MF.Y.0007.000000T0000Z-260519T1700Z/
/O.CON.KGRB.SC.Y.0053.260519T1500Z-260520T0000Z/
Green Bay south of line from Cedar River to Rock Island Passage
and north of a line from Oconto WI to Little Sturgeon Bay WI-
Green Bay south of line from Oconto WI to Little Sturgeon Bay WI-
234 AM CDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CDT TODAY...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING
TO 7 PM CDT THIS EVENING...
* WHAT...For the Dense Fog Advisory, dense fog will reduce
visibility to less than 1 NM. For the Small Craft Advisory,
west winds 10 to 15 kt with gusts up to 20 kt and waves 1 to 2
ft expected.
* WHERE...Central and Southern Bay of Green Bay.
* WHEN...For the Dense Fog Advisory, until noon CDT today. For
the Small Craft Advisory, from 10 AM this morning to 7 PM CDT
this evening.
* IMPACTS...Conditions will be hazardous to small craft. Low
visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Green Bay WI
234 AM CDT Tue May 19 2026
LMZ541>543-191545-
/O.CON.KGRB.MF.Y.0007.000000T0000Z-260519T1700Z/
/O.CON.KGRB.SC.Y.0053.000000T0000Z-260520T0000Z/
Rock Island Passage to Sturgeon Bay WI-
Sturgeon Bay to Two Rivers WI-Two Rivers to Sheboygan WI-
234 AM CDT Tue May 19 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CDT TODAY...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...
* WHAT...For the Dense Fog Advisory, dense fog will reduce
visibility to 1/2 NM or less. For the Small Craft Advisory,
southwest winds 10 to 20 kt with gusts up to 25 kt and waves 3
to 6 ft.
* WHERE...Lake Michigan nearshore waters from Washington Island
to Sheboygan.
* WHEN...For the Dense Fog Advisory, until noon CDT today. For
the Small Craft Advisory, until 7 PM CDT this evening.
* IMPACTS...Conditions will be hazardous to small craft. Low
visibility will make navigation difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
If you must navigate, proceed with caution. Use proper fog
signals. Make sure all running lights are on. Remember to use
your radar and compass.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
304 AM EDT Tue May 19 2026
LHZ345>349-191515-
/O.CON.KAPX.SC.Y.0041.260519T1200Z-260520T0400Z/
Straits of Mackinac within 5 nm of Mackinac Bridge including
Mackinac Island-St Ignace to False Detour Channel-
5NM East of Mackinac Bridge to Presque Isle Light MI including
Bois Blanc Island-
Presque Isle Light to Sturgeon Pt MI Including Thunder Bay
National Marine Sanctuary-Sturgeon Pt to Alabaster MI-
304 AM EDT Tue May 19 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM THIS MORNING
TO MIDNIGHT EDT TONIGHT...
* WHAT...Highest gusts up to 30 kts from the southwest and
highest waves around 6 feet expected.
* WHERE...Straits of Mackinac within 5 nm of Mackinac Bridge
including Mackinac Island, St Ignace to False Detour Channel,
5NM East of Mackinac Bridge to Presque Isle Light MI including
Bois Blanc Island, Presque Isle Light to Sturgeon Pt MI
Including Thunder Bay National Marine Sanctuary and Sturgeon
Pt to Alabaster MI.
* WHEN...From 8 AM Tuesday to midnight EDT Tuesday night.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
304 AM EDT Tue May 19 2026
LMZ323-341-342-344>346-191515-
/O.CON.KAPX.SC.Y.0040.000000T0000Z-260520T0400Z/
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-
304 AM EDT Tue May 19 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...
* WHAT...Highest gusts up to 30 kts from the southwest and
highest waves around 6 feet.
* WHERE...Portions of Lake Michigan.
* WHEN...Until midnight EDT Tuesday night.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
304 AM EDT Tue May 19 2026
LSZ321-322-191515-
/O.CON.KAPX.SC.Y.0041.260519T1200Z-260520T0400Z/
Whitefish Bay (U.S. Portion)/Whitefish Point to Point Iroquois MI-
St. Marys River Point Iroquois to E. Potagannissing Bay-
304 AM EDT Tue May 19 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM THIS MORNING
TO MIDNIGHT EDT TONIGHT...
* WHAT...Highest gusts up to 30 kts from the west and highest
waves around 7 feet expected.
* WHERE...Whitefish Bay (U. S. Portion)/Whitefish Point to Point
Iroquois MI and St. Marys River Point Iroquois to E.
Potagannissing Bay.
* WHEN...From 8 AM Tuesday to midnight EDT Tuesday night.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Detroit/Pontiac MI
957 PM EDT Mon May 18 2026
LHZ421-422-191415-
/O.EXP.KDTX.SC.Y.0031.000000T0000Z-260519T0200Z/
/O.NEW.KDTX.SC.Y.0032.260519T1400Z-260520T0200Z/
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-
957 PM EDT Mon May 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM TO 10 PM EDT
TUESDAY...
...SMALL CRAFT ADVISORY WILL EXPIRE AT 10 PM EDT THIS EVENING...
* WHAT...Expect sustained winds up to 25 knots from the
southwest with gusts up to 32 knots. The largest significant
waves will be 5 feet with a potential maximum wave height of 7
feet.
* WHERE...Outer Saginaw Bay SW of Alabaster to Port Austin MI to
Inner Saginaw Bay and Inner Saginaw Bay SW of Point Au Gres to
Bay Port MI.
* WHEN...The maximum winds are expected around 11 AM EDT Tuesday
with the largest waves expected around 1 PM 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.
&&
$$
URGENT - MARINE WEATHER MESSAGE
National Weather Service Detroit/Pontiac MI
957 PM EDT Mon May 18 2026
LHZ441>443-191415-
/O.EXP.KDTX.SC.Y.0031.000000T0000Z-260519T0200Z/
/O.NEW.KDTX.SC.Y.0032.260519T1400Z-260520T0200Z/
Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI-
Port Sanilac to Port Huron MI-
957 PM EDT Mon May 18 2026
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 AM TO 10 PM EDT
TUESDAY...
...SMALL CRAFT ADVISORY WILL EXPIRE AT 10 PM EDT THIS EVENING...
* WHAT...Expect sustained winds up to 19 knots from the
southwest with gusts up to 29 knots. The largest significant
waves will be 4 feet with a potential maximum wave height of 5
feet.
* WHERE...Port Austin to Harbor Beach MI, Harbor Beach to Port
Sanilac MI and Port Sanilac to Port Huron MI.
* WHEN...The maximum winds are expected around 2 PM EDT Tuesday
with the largest waves expected around 3 PM EDT Tuesday.
* IMPACTS...Conditions will be hazardous to small craft.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
&&
$$
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
548 AM CDT Tue May 19 2026
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-201100-
Lake Michigan Michigan City IN to St. Joseph MI 5 NM offshore to
mid-line of lake.-
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 Point Betsie to Manistee MI 5NM offshore to
Mid Lake-
Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM
offshore to mid lake-
Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to
Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid
Lake-
Lake Michigan from Sheboygan to Port Washington WI 5NM offshore
to Mid Lake-
Lake Michigan from Port Washington to North Point Light WI 5NM
offshore to Mid Lake-
Lake Michigan from North Point Light to Wind Point WI 5NM
offshore to Mid Lake-
Lake Michigan from Wind Point WI to Winthrop Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Winthrop Harbor to Wilmette Harbor IL 5NM
offshore to Mid Lake-
Lake Michigan from Wilmette Harbor to Michigan City in 5NM
offshore to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid
Lake-
Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to
Mid Lake-
Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid
Lake-
Lake Michigan from South Haven to Holland MI 5NM offshore to Mid
lake-
Lake Michigan from St Joseph to South Haven MI 5NM offshore to
Mid Lake-
548 AM CDT Tue May 19 2026
This Hazardous Weather Outlook is for the open waters of Lake Michigan.
.DAY ONE...Today and Tonight
Dense Fog Advisory over the north half of the lake through this
morning.
Breezy south winds continue into the afternoon.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
No hazardous weather is anticipated at this time.
$$
www.weather.gov/mkx
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
548 AM CDT Tue May 19 2026
LMZ643>646-201100-
Sheboygan to Port Washington WI-
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
548 AM CDT Tue May 19 2026
This Hazardous Weather Outlook is for the nearshore waters from
Sheboygan Wisconsin to Winthrop Harbor Illinois.
.DAY ONE...Today and Tonight
A Small Craft Advisory is in effect into this afternoon for
breezy south winds. There is a chance for thunderstorms into the
early afternoon.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
Small Craft Advisory level waves may return on Friday.
$$
Hazardous Weather Outlook
National Weather Service Milwaukee/Sullivan WI
548 AM CDT Tue May 19 2026
WIZ046-047-051-052-056>060-062>072-201100-
Marquette-Green Lake-Fond du Lac-Sheboygan-Sauk-Columbia-Dodge-
Washington-Ozaukee-Iowa-Dane-Jefferson-Waukesha-Milwaukee-
Lafayette-Green-Rock-Walworth-Racine-Kenosha-
548 AM CDT Tue May 19 2026
This Hazardous Weather Outlook is for portions of east central
Wisconsin, south central Wisconsin and southeast Wisconsin.
.DAY ONE...Today and Tonight
Isolated thunderstorms may occur this morning into the early
afternoon ahead of a cold front
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
Chances for thunderstorms return Friday evening.
.SPOTTER INFORMATION STATEMENT...
Spotter activation will not be needed.
$$
Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
320 AM EDT Tue May 19 2026
LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-200730-
Lake St Clair-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM
off shore-
Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw
Bay-Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI-
Port Sanilac to Port Huron MI-
Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore-
Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore-
Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore-
320 AM EDT Tue May 19 2026
This hazardous weather outlook is for portions of Lake Erie, Lake
Huron and Lake St Clair.
.DAY ONE...Today and Tonight
The potential exists for severe thunderstorms to develop mainly
between 3 and 9 pm today. Storms will be capable of producing
damaging wind gusts to 50 knots, hail to one inch in diameter and
isolated tornadoes. Storms will track from west to east at 40 to 45
mph.
A small craft advisory is in effect through this evening. Refer to
the latest marine forecast for details.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed late this afternoon and evening.
$$
You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.
MR
Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
320 AM EDT Tue May 19 2026
MIZ047>049-053>055-060>063-068>070-075-076-082-083-200730-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
320 AM EDT Tue May 19 2026
This hazardous weather outlook is for southeast Michigan.
.DAY ONE...Today and Tonight
The potential exists for severe thunderstorms to develop mainly
between 3 and 9 pm today. A greater risk exists southeast of a line
from Howell to Sandusky. Storms will be capable of producing damaging
wind gusts to 60 mph, hail to one inch in diameter and isolated
tornadoes. Storms will track from west to east at 40 to 45 mph.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotter activation may be needed late this afternoon and evening.
$$
Hazardous Weather Outlook
National Weather Service Gaylord MI
310 AM EDT Tue May 19 2026
LHZ345>349-LMZ323-341-342-344>346-LSZ321-322-200715-
Straits of Mackinac within 5 nm of Mackinac Bridge including
Mackinac Island-St Ignace to False Detour Channel-
5NM East of Mackinac Bridge to Presque Isle Light MI including
Bois Blanc Island-
Presque Isle Light to Sturgeon Pt MI Including Thunder Bay
National Marine Sanctuary-Sturgeon Pt to Alabaster MI-
Grand Traverse Bay south of a line Grand Traverse Light to
Norwood MI-Seul Choix Point to 5NM West of Mackinac Bridge-
Norwood MI to 5NM West of Mackinac Bridge including Little
Traverse Bay-Sleeping Bear Point to Grand Traverse Light MI-
Point Betsie to Sleeping Bear Point MI-
Manistee to Point Betsie MI-
Whitefish Bay (U.S. Portion)/Whitefish Point to Point Iroquois MI-
St. Marys River Point Iroquois to E. Potagannissing Bay-
310 AM EDT Tue May 19 2026
This hazardous weather outlook is for the northern Michigan
nearshore waters of Lake Huron, Lake Michigan and Lake Superior.
.DAY ONE...Today and tonight.
Patchy dense fog is expected this morning, especially along
the Straits of Mackinac and north.
A few additional thunderstorms are possible this morning through
afternoon. While storms are not expected to be severe, one or two
stronger storms producing gusty winds or small hail remain
possible.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Spotters are encouraged to report any significant weather and
rainfall amounts to the National Weather Service. Reports may be
made one of three ways:
Online: weather.gov/gaylord
Facebook: facebook.com/nwsgaylord
Twitter: twitter.com/nwsgaylord
For more information visit http://weather.gov/gaylord.
$$
Hazardous Weather Outlook
National Weather Service Gaylord MI
310 AM EDT Tue May 19 2026
MIZ016>018-020>036-041-042-086>088-095>099-200715-
Emmet-Cheboygan-Presque Isle-Leelanau-Antrim-Otsego-Montmorency-
Alpena-Benzie-Grand Traverse-Kalkaska-Crawford-Oscoda-Alcona-
Manistee-Wexford-Missaukee-Roscommon-Ogemaw-Iosco-Gladwin-Arenac-
Western Chippewa-Central Chippewa-Southeast Chippewa-
Western Mackinac-Eastern Mackinac-
Mackinac Island/Bois Blanc Island-
Beaver Island and surrounding islands-Charlevoix-
310 AM EDT Tue May 19 2026
This hazardous weather outlook is for Eastern Upper Michigan and
Northern Lower Michigan.
.DAY ONE...Today and tonight.
Patchy dense fog is expected this morning, especially along
Michigans Eastern Upper Peninsula and the Tip of the Mitt.
A few additional thunderstorms are possible this morning through
afternoon. While storms are not expected to be severe, one or two
stronger storms producing gusty winds or small hail remain
possible.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday.
Potential for frost development returns Tonight through Thursday
night.
.SPOTTER INFORMATION STATEMENT...
Spotters are encouraged to report any significant weather and
rainfall amounts to the National Weather Service. Reports may be
made one of three ways:
Online: weather.gov/gaylord
Facebook: facebook.com/nwsgaylord
Twitter: twitter.com/nwsgaylord
For more information visit http://weather.gov/gaylord.
$$
Hazardous Weather Outlook
National Weather Service Marquette MI
309 AM EDT Tue May 19 2026
LMZ221-248-250-200715-
Green Bay North of line from Cedar River MI to Rock Island
Passage-Seul Choix Point to Point Detour MI-
5NM East of a line from Fairport MI to Rock Island Passage-
309 AM EDT Tue May 19 2026
This Hazardous Weather Outlook is for portions of Northern Lake
Michigan.
.DAY ONE...Today and Tonight
Thunderstorms and dense fog are possible this morning.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to submit reports to the National
Weather Service in Marquette. The public may also submit reports
on our webpage or through social media using #906wx.
$$
GS
Hazardous Weather Outlook
National Weather Service Marquette MI
309 AM EDT Tue May 19 2026
LSZ162-240>251-263>267-200715-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-Saxon Harbor WI to Black River MI-
Black River to Ontonagon MI-
Ontonagon to Upper Entrance of Portage Canal MI-
Upper Entrance of Portage Canal to Eagle River MI-
Eagle River to Manitou Island MI-
Manitou Island to Point Isabelle MI-
Point Isabelle to Lower Entrance of Portage Canal MI-
Lower Entrance of Portage Canal To Huron Islands MI Including
Keweenaw and Huron Bays-Huron Islands to Marquette MI-
Marquette to Munising MI-Munising to Grand Marais MI-
Grand Marais to Whitefish Point MI-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
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-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
309 AM EDT Tue May 19 2026 /209 AM CDT Tue May 19 2026/
This Hazardous Weather Outlook is for portions of Central Lake
Superior...Eastern Lake Superior and Western Lake Superior.
.DAY ONE...Today and Tonight
Thunderstorms and dense fog are possible this morning.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
No hazardous weather is expected at this time.
.SPOTTER INFORMATION STATEMENT...
The need for weather spotter reports is not anticipated at this
time.
$$
Hazardous Weather Outlook
National Weather Service Marquette MI
309 AM EDT Tue May 19 2026
MIZ001>007-009>014-084-085-200715-
Keweenaw-Ontonagon-Northern Houghton-Baraga-Marquette-Alger-Luce-
Gogebic-Iron-Dickinson-Menominee-Delta-Southern Schoolcraft-
Southern Houghton-Northern Schoolcraft-
309 AM EDT Tue May 19 2026 /209 AM CDT Tue May 19 2026/
This Hazardous Weather Outlook is for portions of central Upper
Michigan and western Upper Michigan.
.DAY ONE...Today and Tonight
A few thunderstorms are possible this morning.
Dense fog will reduce visibility to a quarter mile or less this
morning ahead of thunderstorms. See the Dense Fog Advisories for
more details.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
Chances of frost are up to 35 percent Friday morning, which may
impact unprotected plants during the early part of the growing
season.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to submit reports to the National
Weather Service in Marquette. The public may also submit reports
on our webpage or through social media using #906wx.
$$
Hazardous Weather Outlook
National Weather Service Green Bay WI
144 AM CDT Tue May 19 2026
LMZ521-522-541>543-200645-
The Bay of Green Bay south of a line from Cedar River MI to Rock
Island Passage-Lake Michigan from Washington Island to Sheboygan-
144 AM CDT Tue May 19 2026
This Hazardous Weather Outlook is for portions of northwest Lake
Michigan and the waters of Green Bay.
.DAY ONE...Today and Tonight
There is a chance of thunderstorms early this morning.
Fog will reduce visibility to less than 1 NM this morning.
Conditions hazardous to small craft are expected on Lake Michigan
nearshore waters through this afternoon.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
The probability for widespread hazardous weather is low.
$$
GK
Hazardous Weather Outlook
National Weather Service Green Bay WI
144 AM CDT Tue May 19 2026
WIZ005-010>013-018>022-030-031-035>040-045-048>050-073-074-200645-
Vilas-Oneida-Forest-Florence-Northern Marinette County-Lincoln-
Langlade-Menominee-Northern Oconto County-Door-Marathon-Shawano-
Wood-Portage-Waupaca-Outagamie-Brown-Kewaunee-Waushara-Winnebago-
Calumet-Manitowoc-Southern Marinette County-
Southern Oconto County-
144 AM CDT Tue May 19 2026
This Hazardous Weather Outlook is for north-central and northeast
Wisconsin.
.DAY ONE...Today and Tonight
Thunderstorms will continue to move northeast across the region
early this morning with isolated damaging winds are the primary
threat.
.DAYS TWO THROUGH SEVEN...Wednesday through Monday
Frost is possible across mainly northern Wisconsin Tuesday night
and Wednesday night.
.SPOTTER INFORMATION STATEMENT...
Spotters are requested to report peak wind gusts to the National
Weather Service in Green Bay.
$$
