672
FZUS63 KMKX 081928
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
228 PM CDT MON SEP 8 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
HIGH PRESSURE AROUND 30.3 INCHES WILL CONTINUE TO MOVE EAST ACROSS
THE LOWER GREAT LAKES AND NEW ENGLAND INTO TUESDAY. MEANWHILE A
WAVE OF LOW PRESSURE WILL MOVE ACROSS LAKE SUPERIOR TONIGHT WITH
DEVELOPING BREEZY SOUTH WINDS ESPECIALLY ACROSS THE NORTH HALF OF
THE LAKE. THE BREEZY SOUTH WINDS WILL CONTINUE INTO TUESDAY BUT
BECOME MUCH LIGHTER TUESDAY NIGHT AND WEDNESDAY. A DECAYING COLD
FRONTAL PASSAGE IS THEN EXPECTED FROM THE NORTH WEDNESDAY NIGHT.
LIGHT NORTHEAST WINDS WILL PREVAIL ON THURSDAY AFTER THE FRONTAL
PASSAGE, BECOMING EAST TO SOUTHEAST FOR FRIDAY.
LMZ261-362-364-366-563-565-567-868-090430-
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-
228 PM CDT MON SEP 8 2025
SHEBOYGAN WI TO PENTWATER MI NORTH...
TONIGHT
SOUTH WINDS TO 30 KT. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT.
TUESDAY
SOUTHWEST WINDS TO 30 KT BECOMING SOUTH 15 TO 25 KT.
SLIGHT CHANCE OF SHOWERS IN THE AFTERNOON. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
TUESDAY NIGHT
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.
WEDNESDAY
SOUTHWEST WINDS 5 TO 10 KT. WAVES 1 TO 3 FT.
WEDNESDAY NIGHT
NORTHEAST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
THURSDAY
NORTHEAST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
WAVES 1 TO 2 FT.
THURSDAY NIGHT
NORTHEAST WINDS 10 TO 15 KT BECOMING SOUTHEAST
5 TO 10 KT. WAVES 1 TO 2 FT.
FRIDAY
SOUTH WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SATURDAY
SOUTHWEST WINDS 10 TO 15 KT INCREASING TO 10 TO
20 KT. CHANCE OF SHOWERS. WAVES 1 TO 3 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-090430-
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-
228 PM CDT MON SEP 8 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TONIGHT
SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
TUESDAY
SOUTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
TUESDAY NIGHT
SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH 5 TO
10 KT. WAVES 3 TO 5 FT SUBSIDING TO 1 TO 3 FT.
WEDNESDAY
SOUTH WINDS 5 TO 10 KT. WAVES 1 TO 3 FT.
WEDNESDAY NIGHT
EAST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
THURSDAY
EAST WINDS 5 TO 10 KT BECOMING NORTHEAST. WAVES 1 TO
2 FT.
THURSDAY NIGHT
NORTHEAST WINDS 5 TO 10 KT BECOMING EAST 10 TO
15 KT. WAVES 1 TO 3 FT.
FRIDAY
SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH. WAVES 1 TO
3 FT.
SATURDAY
SOUTH WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
LMZ761-090430-
MAFOR 0822/
MICHIGAN NORTH 14440 11440 12540 11430. WAVES 3 TO 6 FEET.
MICHIGAN SOUTH 12420 13430 13420. WAVES 2 TO 4 FEET BUILDING TO 3
TO 5 FEET TONIGHT. WAVES 3 TO 5 FEET TUESDAY.
GEHRING
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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