WHUS73 KAPX 210042

MWWAPX



URGENT - MARINE WEATHER MESSAGE

National Weather Service Gaylord MI

842 PM EDT Mon Apr 20 2026



LHZ345-LMZ323-341-342-344>346-211345-

/O.NEW.KAPX.SC.Y.0029.260421T0042Z-260421T1500Z/

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-

842 PM EDT Mon Apr 20 2026



...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT TUESDAY...



* WHAT...Highest gusts up to 30 kts from the south and highest 

  waves around 6 feet.



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



* WHEN...Until 11 AM EDT 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.



&&



$$



LSZ321-211345-

/O.NEW.KAPX.SC.Y.0029.260421T0042Z-260421T1500Z/

Whitefish Bay (U.S. Portion)/Whitefish Point to Point Iroquois MI-

842 PM EDT Mon Apr 20 2026



...SMALL CRAFT ADVISORY IN EFFECT UNTIL 11 AM EDT TUESDAY...



* WHAT...Highest gusts up to 25 kts from the south and highest 

  waves around 3 feet.



* WHERE...Whitefish Bay (U. S. Portion)/Whitefish Point to Point 

  Iroquois MI.



* WHEN...Until 11 AM EDT 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.



&&



$$



LHZ348-349-211345-

/O.NEW.KAPX.SC.Y.0029.260421T0600Z-260421T1800Z/

Presque Isle Light to Sturgeon Pt MI Including Thunder Bay

National Marine Sanctuary-Sturgeon Pt to Alabaster MI-

842 PM EDT Mon Apr 20 2026



...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM TO 2 PM EDT TUESDAY...



* WHAT...Highest gusts up to 25 kts from the south and highest 

  waves around 5 feet expected.



* WHERE...Presque Isle Light to Sturgeon Pt MI Including Thunder 

  Bay National Marine Sanctuary and Sturgeon Pt to Alabaster MI.



* WHEN...From 2 AM to 2 PM EDT 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.



&&



$$