509
WHUS73 KAPX 161742
MWWAPX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
142 PM EDT Sun Aug 16 2026

LSZ321-322-170145-
/O.CON.KAPX.SC.Y.0068.260816T1800Z-260817T0400Z/
Whitefish Bay (U.S. Portion)/Whitefish Point to Point Iroquois MI-
St. Marys River Point Iroquois to E. Potagannissing Bay-
142 PM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

* WHAT...Highest gusts up to 25 kts from the northwest and
  highest waves around 5 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 2 PM this afternoon to midnight EDT tonight.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LMZ323-341-342-344-170145-
/O.CON.KAPX.SC.Y.0068.260816T1800Z-260817T0400Z/
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-
142 PM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

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

* WHERE...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 and Sleeping Bear Point to Grand Traverse
  Light MI.

* WHEN...From 2 PM this afternoon to midnight EDT tonight.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LHZ345-346-170145-
/O.CON.KAPX.SC.Y.0068.260816T1800Z-260817T0400Z/
Straits of Mackinac within 5 nm of Mackinac Bridge including
Mackinac Island-St Ignace to False Detour Channel-
142 PM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

* WHAT...Highest gusts up to 25 kts from the northwest and
  highest waves around 3 feet expected.

* WHERE...Straits of Mackinac within 5 nm of Mackinac Bridge
  including Mackinac Island and St Ignace to False Detour
  Channel.

* WHEN...From 2 PM this afternoon to midnight EDT tonight.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

LHZ347>349-170145-
/O.CON.KAPX.SC.Y.0068.260816T1800Z-260817T0900Z/
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-
142 PM EDT Sun Aug 16 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 5 AM EDT MONDAY...

* WHAT...Highest gusts up to 25 kts from the northwest and
  highest waves around 5 feet expected.

* WHERE...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 2 PM this afternoon to 5 AM EDT Monday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$