WWA Summary for Dense Fog Advisory Issued by LOT

Dense Fog Advisory

URGENT - MARINE WEATHER MESSAGE
National Weather Service Grand Rapids MI
1056 AM EDT Fri Apr 17 2026

LMZ844>849-172300-
/O.CON.KGRR.MF.Y.0002.000000T0000Z-260418T0000Z/
/O.CON.KGRR.SC.Y.0023.260418T0000Z-260419T1200Z/
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-
1056 AM EDT Fri Apr 17 2026

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING
TO 8 AM EDT SUNDAY...

* WHAT...For the Dense Fog Advisory, dense fog will reduce
  visibility to one nautical mile. For the Small Craft Advisory,
  west winds 15 to 25 knots with gusts up to 30 knots and waves 3
  to 6 feet expected.

* WHERE...St Joseph to Manistee.

* WHEN...For the Dense Fog Advisory, until 8 PM EDT this
  evening. For the Small Craft Advisory, from 8 PM this evening
  to 8 AM EDT Sunday.

* 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 Milwaukee/Sullivan WI
907 AM CDT Fri Apr 17 2026

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-172215-
/O.CON.KMKX.MF.Y.0004.000000T0000Z-260418T0000Z/
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-
907 AM CDT Fri Apr 17 2026

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...

* WHAT...Dense fog will reduce visibility to 1/4 NM or less.

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

* WHEN...Until 7 PM CDT this evening.

* 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.

&&

$$
MRC

URGENT - MARINE WEATHER MESSAGE
National Weather Service Milwaukee/Sullivan WI
907 AM CDT Fri Apr 17 2026

LMZ643>646-172215-
/O.CON.KMKX.MF.Y.0004.000000T0000Z-260418T0000Z/
/O.CON.KMKX.SC.Y.0043.260417T1800Z-260419T0300Z/
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-
907 AM CDT Fri Apr 17 2026

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS
EVENING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS
AFTERNOON TO 10 PM CDT SATURDAY...

* WHAT...For the Dense Fog Advisory, dense fog will reduce
  visibility to 1/4 NM or less. For the Small Craft Advisory,
  south to southeast winds around 15 kt with gusts up to 25 kt and
  waves 3 to 6 ft this afternoon and evening. Winds turn west to
  northwest tonight, remaining gusty into Saturday.

* WHERE...Nearshore Waters from Sheboygan to Winthrop Harbor IL.

* WHEN...For the Dense Fog Advisory, until 7 PM CDT this
  evening. For the Small Craft Advisory, from 1 PM this
  afternoon to 10 PM CDT Saturday.

* 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.

&&

$$