617
FZUS63 KMKX 230856
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
256 AM CST TUE DEC 23 2025
FOR WATERS BEYOND FIVE NAUTICAL MILES OF SHORE ON LAKE MICHIGAN.
WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS, WHICH
IS THE AVERAGE OF THE HIGHEST 1/3 OF THE WAVE, ALONG WITH THE
AVERAGE HEIGHT OF THE HIGHEST 10% OF THE WAVES WHICH WILL
OCCASIONALLY BE ENCOUNTERED.
SYNOPSIS
SOUTHWEST WINDS EARLY THIS MORNING WILL GRADUALLY BECOME
NORTHWEST BY THIS AFTERNOON, AS LOW PRESSURE AROUND 29.8 INCHES
MOVES INTO ONTARIO. HIGH PRESSURE AROUND 30.4 INCHES WILL THEN
MOVE FROM NORTH DAKOTA INTO NORTHERN MINNESOTA BY TONIGHT. WINDS
WILL BECOME LIGHT AND NORTHERLY. THIS HIGH WILL THEN MOVE OVER
NORTHERN LAKE SUPERIOR WEDNESDAY BRINGING LIGHT AND VARIABLE WINDS
TO LAKE MICHIGAN. SOUTH TO SOUTHEAST WINDS ARE EXPECTED BEHIND
THE HIGH WEDNESDAY NIGHT.
ANOTHER STRONGER HIGH AROUND 30.5 INCHES WILL MOVE EAST ACROSS
SOUTHERN MANITOBA INTO ONTARIO EARLY CHRISTMAS DAY, WITH WINDS
STEADILY INCREASING OUT OF THE NORTHEAST TO EAST.
LMZ261-362-364-366-563-565-567-868-231615-
LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE
MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH
FOX ISLAND 5 NM OFFSHORE-
LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI-
LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
256 AM CST TUE DEC 23 2025
SHEBOYGAN WI TO PENTWATER MI NORTH...
TODAY
WEST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT EARLY
THIS AFTERNOON, THEN BECOMING NORTHWEST TO 30 KT LATE. WAVES 3 TO
5 FT.
TONIGHT
NORTHWEST WINDS TO 30 KT BECOMING NORTH 15 TO 25 KT
LATE IN THE EVENING, THEN DIMINISHING TO 10 TO 20 KT AFTER
MIDNIGHT DIMINISHING TO 5 TO 10 KT LATE. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
WEDNESDAY
EAST WINDS 10 TO 15 KT VEERING TO SOUTH 10 TO 20 KT.
WAVES 2 TO 4 FT.
WEDNESDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KT VEERING TO NORTH
10 TO 20 KT. WAVES 2 TO 4 FT.
THURSDAY
NORTHEAST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
THURSDAY NIGHT
EAST WINDS 15 TO 25 KT BECOMING SOUTHEAST TO
30 KT. CHANCE OF SNOW, RAIN AND LIGHT FREEZING RAIN. WAVES 3 TO
5 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
FRIDAY
SOUTHEAST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
SNOW AND LIGHT FREEZING RAIN LIKELY. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT SUBSIDING TO 3 TO 5 FT.
SATURDAY
SOUTHEAST WINDS 10 TO 20 KT. CHANCE OF RAIN. WAVES
2 TO 4 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-231615-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE
TO MID LAKE-
LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO
MID LAKE-
256 AM CST TUE DEC 23 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TODAY
WEST WINDS 10 TO 20 KT BECOMING NORTHWEST. WAVES 2 TO
4 FT.
TONIGHT
NORTHWEST WINDS 10 TO 20 KT VEERING TO NORTHEAST 10 TO
15 KT. WAVES 3 TO 5 FT SUBSIDING TO 2 TO 4 FT.
WEDNESDAY
EAST WINDS 10 TO 15 KT BECOMING SOUTHEAST 10 TO
20 KT. WAVES 3 TO 5 FT.
WEDNESDAY NIGHT
SOUTH WINDS 10 TO 15 KT VEERING TO NORTHWEST.
CHANCE OF RAIN IN THE EVENING. WAVES 2 TO 4 FT SUBSIDING TO 1 TO
3 FT.
THURSDAY
NORTHEAST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT.
THURSDAY NIGHT
EAST WINDS 15 TO 25 KT BECOMING SOUTHEAST. RAIN
LIKELY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 4 TO
7 FT OCCASIONALLY TO 9 FT.
FRIDAY
SOUTHEAST WINDS 15 TO 25 KT BECOMING EAST 10 TO 20 KT.
CHANCE OF RAIN. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO
3 TO 5 FT.
SATURDAY
SOUTHEAST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
LMZ761-231615-
MAFOR 2311/
MICHIGAN NORTH 11610 11620 11630 11730 11740 11830 11820 11810.
WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET TODAY. WAVES 3 TO 5
FEET SUBSIDING TO 1 TO 3 FEET TONIGHT.
MICHIGAN SOUTH 11620 11610 11620 13720 11810 11110. WAVES 2 TO 4
FEET SUBSIDING TO 1 TO 3 FEET, THEN BUILDING TO 2 TO 4 FEET
TODAY. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET TONIGHT.
PATTERSON
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/MKX/GLFTABLE
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page