637
FZUS63 KMKX 250752
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
252 AM CDT WED MAR 25 2026
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
LIGHT SOUTHEAST TO SOUTH WINDS WILL GRADUALLY INCREASE AND BECOME
DUE SOUTHERLY BY LATE THIS MORNING. INCREASE WINDS IS CAUSED BY
THE TIGHTER PRESSURE GRADIENT BETWEEN A HIGH PRESSURE OF 30.5
INCHES OVER THE MID- ATLANTIC AND LOW PRESSURE OF 29.6 INCHES
TRAVELING FROM THE NORTHERN PLAINS INTO MINNESOTA. A COLD FRONT
WILL THEN MOVE SOUTHWARD ACROSS THE LAKE THURSDAY MORNING INTO THE
AFTERNOON, WITH INCREASING NORTHERLY WINDS EXPECTED BEHIND THE
FRONT. INCREASING CONFIDENCE ON A SHORT PERIOD OF GALES THURSDAY
EVENING INTO EARLY FRIDAY MORNING HAS RESULTED IN A GALE WATCH FOR
THE SOUTHERN TWO- THIRDS.
BREEZY WEST TO NORTHWEST WINDS ARE LIKELY TO DEVELOP LATER FRIDAY
EVENING INTO FRIDAY NIGHT IN ADVANCE OF HIGH PRESSURE OF 30.7
INCHES APPROACHING FROM THE NORTHWEST. WINDS MAY EASE A BIT BY
LATER SATURDAY AS THE HIGH MOVES OVERHEAD, WITH BREEZY SOUTHERLY
WINDS THEN DEVELOPING BY SUNDAY BEHIND THE DEPARTING HIGH AND
AHEAD OF AN APPROACHING LOW.
LMZ261-362-364-563-251515-
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 ROCK ISLAND PASSAGE TO STURGEON BAY WI-
252 AM CDT WED MAR 25 2026
STURGEON BAY WI TO POINT BETSIE MI NORTH...
TODAY
SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH TO 30 KT.
SLIGHT CHANCE OF RAIN THIS AFTERNOON. WAVES 1 TO 3 FT BUILDING TO
4 TO 6 FT OCCASIONALLY TO 8 FT.
TONIGHT
SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 10 TO 20 KT
LATE IN THE EVENING, THEN DIMINISHING TO 10 TO 15 KT AFTER
MIDNIGHT DIMINISHING TO 5 TO 10 KT LATE. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT.
THURSDAY
WEST WINDS 5 TO 10 KT BECOMING NORTHWEST 10 TO 15 KT
LATE IN THE MORNING, THEN BECOMING NORTH 10 TO 20 KT EARLY IN THE
AFTERNOON INCREASING TO 30 KT LATE. CHANCE OF RAIN. WAVES 1 TO
3 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
THURSDAY NIGHT
NORTH WINDS TO 30 KT. WAVES 6 TO 9 FT
OCCASIONALLY TO 12 FT.
FRIDAY
NORTH WINDS 10 TO 20 KT BACKING TO NORTHWEST 10 TO
15 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 1 TO
3 FT.
FRIDAY NIGHT
NORTHWEST WINDS 10 TO 15 KT BECOMING WEST 10 TO
20 KT. WAVES 1 TO 3 FT.
SATURDAY
WEST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 2 TO 4 FT.
SUNDAY
SOUTH WINDS 10 TO 20 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT.
LMZ366-565-567-868-251515-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
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-
252 AM CDT WED MAR 25 2026
STURGEON BAY WI TO POINT BETSIE MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...
...GALE WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE
THURSDAY NIGHT...
TODAY
SOUTH WINDS 10 TO 20 KT INCREASING TO 30 KT. WAVES 1 TO
3 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
TONIGHT
SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 5 TO 10 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT.
THURSDAY
SOUTHWEST WINDS 5 TO 10 KT VEERING TO NORTHWEST 10 TO
20 KT LATE IN THE MORNING, THEN BECOMING NORTH 15 TO 25 KT EARLY
IN THE AFTERNOON INCREASING TO 30 KT LATE. CHANCE OF RAIN. WAVES
2 TO 4 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
THURSDAY NIGHT
NORTH GALES TO 35 KT. WAVES 8 TO 12 FT
OCCASIONALLY TO 16 FT.
FRIDAY
NORTH WINDS 15 TO 25 KT BECOMING NORTHWEST 10 TO 20 KT.
WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT SUBSIDING TO 3 TO 5 FT.
FRIDAY NIGHT
WEST WINDS 10 TO 15 KT BECOMING NORTHWEST. WAVES
1 TO 3 FT.
SATURDAY
WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST. WAVES 2 TO
4 FT.
SUNDAY
SOUTH WINDS 10 TO 20 KT. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-251515-
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-
252 AM CDT WED MAR 25 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
...GALE WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE
THURSDAY NIGHT...
TODAY
SOUTH WINDS 10 TO 20 KT INCREASING TO 30 KT. WAVES 2 TO
4 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
TONIGHT
SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST 10 TO
15 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO
4 FT.
THURSDAY
SOUTHWEST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT
LATE IN THE MORNING, THEN VEERING TO NORTHWEST 15 TO 25 KT EARLY
IN THE AFTERNOON BECOMING NORTH TO 30 KT LATE. CHANCE OF RAIN IN
THE AFTERNOON. WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT OCCASIONALLY
TO 9 FT.
THURSDAY NIGHT
NORTH GALES TO 35 KT INCREASING TO GALES TO
40 KT. CHANCE OF RAIN IN THE EVENING. WAVES 10 TO 14 FT
OCCASIONALLY TO 18 FT.
FRIDAY
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT IN THE
AFTERNOON. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT SUBSIDING TO
4 TO 7 FT OCCASIONALLY TO 9 FT.
FRIDAY NIGHT
NORTHWEST WINDS 10 TO 15 KT. WAVES 3 TO 5 FT
SUBSIDING TO 1 TO 3 FT.
SATURDAY
WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST. WAVES 2 TO
4 FT.
SUNDAY
SOUTH WINDS 10 TO 20 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT.
LMZ761-251515-
MAFOR 2510/
MICHIGAN NORTH 11320 11330 13440 11520 12510. WAVES 1 TO 3 FEET
BUILDING TO 3 TO 6 FEET TODAY. WAVES 3 TO 6 FEET SUBSIDING TO 1
TO 3 FEET TONIGHT.
MICHIGAN SOUTH 11320 11420 12440 11430 11420 11520 11510. WAVES 1
TO 3 FEET BUILDING TO 3 TO 5 FEET TODAY. WAVES 3 TO 5 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
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