Marine Weather Message
Issued by NWS Gaylord, MI

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557
WHUS73 KAPX 181705
MWWAPX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
105 PM EDT Tue Aug 18 2026

LHZ345-LMZ323-342-344>346-190115-
/O.NEW.KAPX.SC.Y.0069.260818T1705Z-260819T0300Z/
Straits of Mackinac within 5 nm of Mackinac Bridge including
Mackinac Island-
Grand Traverse Bay south of a line Grand Traverse Light to
Norwood MI-
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-
105 PM EDT Tue Aug 18 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 PM EDT THIS EVENING...

* WHAT...Highest gusts up to 25 kts from the west and highest
  waves around 4 feet.

* WHERE...Portions of Lake Huron and Lake Michigan.

* WHEN...Until 11 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.

&&

$$

LHZ346-190000-
/O.NEW.KAPX.SC.Y.0069.260818T1705Z-260819T0000Z/
St Ignace to False Detour Channel-
105 PM EDT Tue Aug 18 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

* WHAT...Highest gusts up to 25 kts from the west and highest
  waves around 4 feet.

* WHERE...St Ignace to False Detour Channel.

* 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.

&&

$$