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Small Craft Advisory 0055
Issued by the Milwaukee / Sullivan Forecast Office

Action Issued Starts Expiration
New 2026-05-18 19:45:03 2026-05-19 04:00:00 2026-05-19 16:00:00
Continued 2026-05-19 03:07:16 2026-05-19 04:00:00 2026-05-19 16:00:00
Continued 2026-05-19 09:07:17 2026-05-19 16:00:00
Continued 2026-05-19 11:07:20 2026-05-19 16:00:00
Time Extended 2026-05-19 15:13:29 2026-05-19 19:00:00


Action: New
Issued At: 2026-05-18 19:45:03

874 
WHUS73 KMKX 190044
MWWMKX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
744 PM CDT Mon May 18 2026

LMZ643-190845-
/O.CAN.KMKX.SC.Y.0054.000000T0000Z-260520T0000Z/
/O.NEW.KMKX.SC.Y.0055.260519T0900Z-260519T2100Z/
Sheboygan to Port Washington WI-
744 PM CDT Mon May 18 2026

...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM TO 4 PM CDT TUESDAY...

* 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.

&&

$$

LMZ261-362-364-366-563-565-567-868-190845-
/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-
744 PM CDT Mon May 18 2026

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON CDT TUESDAY...

* 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.

&&

$$

LMZ644>646-190845-
/O.CON.KMKX.SC.Y.0054.260519T0900Z-260519T2100Z/
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
744 PM CDT Mon May 18 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 AM TO 4 PM CDT
TUESDAY...

* 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 Port Washington to Winthrop 
  Harbor IL.

* 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.

&&

$$


Action: Continued
Issued At: 2026-05-19 03:07:16

279 
WHUS73 KMKX 190806
MWWMKX

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.

&&

$$

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.

&&

$$

LMZ644>646-191615-
/O.CON.KMKX.SC.Y.0054.260519T0900Z-260519T2100Z/
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
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 Port Washington to Winthrop 
  Harbor IL.

* 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.

&&

$$


Action: Continued
Issued At: 2026-05-19 09:07:17

676 
WHUS73 KMKX 191407
MWWMKX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
907 AM CDT Tue May 19 2026

LMZ261-362-364-366-563-565-567-868-191700-
/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-
907 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 today.

* 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.

&&

$$

LMZ643-192100-
/O.CON.KMKX.SC.Y.0055.000000T0000Z-260519T2100Z/
Sheboygan to Port Washington WI-
907 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...Until 4 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.

&&

$$

LMZ644>646-192100-
/O.CON.KMKX.SC.Y.0054.000000T0000Z-260519T2100Z/
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
907 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 Port Washington to Winthrop 
  Harbor IL.

* WHEN...Until 4 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.

&&

$$

MRC


Action: Continued
Issued At: 2026-05-19 11:07:20

595 
WHUS73 KMKX 191607
MWWMKX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
1107 AM CDT Tue May 19 2026

LMZ261-362-364-366-563-565-567-868-192000-
/O.EXT.KMKX.MF.Y.0006.000000T0000Z-260519T2000Z/
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-
1107 AM CDT Tue May 19 2026

...DENSE FOG ADVISORY NOW IN EFFECT UNTIL 3 PM CDT THIS
AFTERNOON...

* WHAT...Dense fog will reduce visibility to less than 1 NM.

* WHERE...Northern Open Waters of Lake Michigan.

* WHEN...Until 3 PM CDT 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.

&&

$$

LMZ643-192015-
/O.CON.KMKX.SC.Y.0055.000000T0000Z-260519T2100Z/
Sheboygan to Port Washington WI-
1107 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 by mid afternoon.

* WHERE...Nearshore Waters from Sheboygan to Port Washington.

* WHEN...Until 4 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.

&&

$$

LMZ644>646-192015-
/O.CON.KMKX.SC.Y.0054.000000T0000Z-260519T2100Z/
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
1107 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 by mid afternoon.

* WHERE...Nearshore Waters from Port Washington to Winthrop 
  Harbor IL.

* WHEN...Until 4 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.

&&

$$

MRC


Action: Time Extended
Issued At: 2026-05-19 15:13:29

431 
WHUS73 KMKX 192013
MWWMKX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
313 PM CDT Tue May 19 2026

LMZ261-362-364-366-563-565-567-868-192115-
/O.EXP.KMKX.MF.Y.0006.000000T0000Z-260519T2000Z/
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-
313 PM CDT Tue May 19 2026

...DENSE FOG ADVISORY HAS EXPIRED...

Winds will become gusty out of the west behind a cold front late
this afternoon. Therefore, the threat for dense fog has 
diminished.

$$

LMZ643-200000-
/O.EXT.KMKX.SC.Y.0055.000000T0000Z-260520T0000Z/
Sheboygan to Port Washington WI-
313 PM CDT Tue May 19 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Westerly winds 15 to 25 kt with gusts up to 30 kt through
  early evening. 

* WHERE...Nearshore Waters from Sheboygan to Port Washington.

* WHEN...Until 7 PM CDT 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.

&&

$$

LMZ644>646-200000-
/O.EXT.KMKX.SC.Y.0054.000000T0000Z-260520T0000Z/
Port Washington to North Point Light WI-
North Point Light to Wind Point WI-
Wind Point WI to Winthrop Harbor IL-
313 PM CDT Tue May 19 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Westerly winds 15 to 25 kt with gusts up to 30 kt through
  early evening.

* WHERE...Nearshore Waters from Port Washington to Winthrop 
  Harbor IL.

* WHEN...Until 7 PM CDT 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.

&&

$$
MRC



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