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.
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