478
WHUS73 KMKX 122150
MWWMKX
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
450 PM CDT TUE MAY 12 2026
LMZ643-130600-
/O.EXT.KMKX.GL.W.0026.000000T0000Z-260513T0100Z/
/O.EXT.KMKX.SC.Y.0051.260513T0100Z-260513T2100Z/
SHEBOYGAN TO PORT WASHINGTON WI-
450 PM CDT TUE MAY 12 2026
..GALE WARNING NOW IN EFFECT UNTIL 8 PM CDT THIS EVENING
...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 8 PM THIS EVENING TO
4 PM CDT WEDNESDAY...
* WHAT...FOR THE GALE WARNING, SOUTH TO SOUTHWEST WINDS 15 TO 25
KT WITH GUSTS UP TO 35 KT AND WAVES 6 TO 9 FT. FOR THE SMALL
CRAFT ADVISORY, WEST TO NORTHWEST WINDS 15 TO 20 KT WITH GUSTS
UP TO 30 KT AND WAVES 4 TO 7 FT SUBSIDING TO 3 TO 5 FEET.
* WHERE...NEARSHORE WATERS FROM SHEBOYGAN TO PORT WASHINGTON.
* WHEN...FOR THE GALE WARNING, UNTIL 8 PM CDT THIS EVENING. FOR
THE SMALL CRAFT ADVISORY, FROM 8 PM THIS EVENING TO 4 PM CDT
WEDNESDAY.
* IMPACTS...STRONG WINDS WILL CAUSE HAZARDOUS WAVES WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD ALTER PLANS TO AVOID THESE HAZARDOUS CONDITIONS.
REMAIN IN PORT, SEEK SAFE HARBOR, ALTER COURSE, AND/OR SECURE THE
VESSEL FOR SEVERE CONDITIONS.
LMZ364-366-563-565-567-669-671-868-870-872-130400-
/O.EXT.KMKX.GL.W.0026.000000T0000Z-260513T0400Z/
LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI 5NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5NM OFFSHORE
TO MID LAKE-
LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5NM OFFSHORE TO
MID LAKE-
450 PM CDT TUE MAY 12 2026
..GALE WARNING NOW IN EFFECT UNTIL 11 PM CDT THIS EVENING
* WHAT...SOUTHWEST WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT AND
WAVES 7 TO 11 FT.
* WHERE...CENTRAL THIRD OF THE OPEN WATERS OF LAKE MICHIGAN,
LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5NM OFFSHORE
TO MID LAKE, AND LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO
STURGEON BAY WI 5NM OFFSHORE TO MID LAKE.
* WHEN...UNTIL 11 PM CDT THIS EVENING.
* IMPACTS...STRONG WINDS WILL CAUSE HAZARDOUS WAVES WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD ALTER PLANS TO AVOID THESE HAZARDOUS CONDITIONS.
REMAIN IN PORT, SEEK SAFE HARBOR, ALTER COURSE, AND/OR SECURE THE
VESSEL FOR SEVERE CONDITIONS.
LMZ644>646-130600-
/O.CON.KMKX.SC.Y.0051.000000T0000Z-260513T2100Z/
PORT WASHINGTON TO NORTH POINT LIGHT WI-
NORTH POINT LIGHT TO WIND POINT WI-
WIND POINT WI TO WINTHROP HARBOR IL-
450 PM CDT TUE MAY 12 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM CDT
WEDNESDAY...
* WHAT...SOUTH TO SOUTHWEST WIND 15 TO 25 KNOTS WITH GUSTS TO 30
KNOTS, BECOMING NORTHWEST 15 TO 25 KNOTS TONIGHT. A FEW GALE
FORCE GUSTS UP TO 35 KT POSSIBLE. WAVES BUILDING TO 4 TO 6 FEET
THIS EVENING THEN SUBSIDING TO 2 TO 4 FEET TONIGHT.
* WHERE...NEARSHORE WATERS FROM PORT WASHINGTON TO WINTHROP
HARBOR IL.
* WHEN...UNTIL 4 PM CDT WEDNESDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
MRC
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page