530
WHUS73 KAPX 201842
MWWAPX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Gaylord MI
242 PM EDT Sun Sep 20 2026

LHZ345-LMZ323-341-342-344>346-210245-
/O.CON.KAPX.SC.Y.0081.000000T0000Z-260921T0600Z/
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-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-
242 PM EDT Sun Sep 20 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT MONDAY...

* WHAT...Highest gusts up to 30 kts from the northeast and
  highest waves around 4 feet.

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

* WHEN...Until 2 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.

&&

$$

LHZ346-347-210245-
/O.CON.KAPX.SC.Y.0081.000000T0000Z-260921T1200Z/
St Ignace to False Detour Channel-
5NM East of Mackinac Bridge to Presque Isle Light MI including
Bois Blanc Island-
242 PM EDT Sun Sep 20 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT MONDAY...

* WHAT...Highest gusts up to 30 kts from the northeast and
  highest waves around 5 feet.

* WHERE...St Ignace to False Detour Channel and 5NM East of
  Mackinac Bridge to Presque Isle Light MI including Bois Blanc
  Island.

* WHEN...Until 8 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.

&&

$$

LHZ348-349-210245-
/O.CON.KAPX.SC.Y.0081.000000T0000Z-260922T0000Z/
Presque Isle Light to Sturgeon Pt MI Including Thunder Bay
National Marine Sanctuary-Sturgeon Pt to Alabaster MI-
242 PM EDT Sun Sep 20 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT MONDAY...

* WHAT...Highest gusts up to 30 kts from the northeast and
  highest waves around 7 feet.

* WHERE...Presque Isle Light to Sturgeon Pt MI Including Thunder
  Bay National Marine Sanctuary and Sturgeon Pt to Alabaster MI.

* WHEN...Until 8 PM 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.

&&

$$