289
FZUS63 KMKX 171401
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
901 AM CDT WED SEP 17 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 IN EASTERN QUEBEC WILL CONTINUE
EAST TODAY AS LOW PRESSURE AROUND 29.7 INCHES SLOWLY LIFTS
NORTHEAST INTO THE HUDSON BAY. WARM TEMPERATURES AND LIGHT WINDS
WILL PERSIST THROUGH TODAY AND BRING A POTENTIAL FOR FOG TONIGHT.
WINDS ARE THEN EXPECTED TO INCREASE A BIT AND SHIFT MORE EASTERLY
THURSDAY AND BEYOND AS ANOTHER AREA OF LOW PRESSURE AROUND 29.9
INCHES DEVELOPS ACROSS THE CENTRAL PLAINS. AS THE LOW LIFTS INTO
THE GREAT LAKES REGION THIS WEEKEND, STRONGER WINDS UP TO AROUND
25 KT WILL BE POSSIBLE.
LMZ261-362-364-366-563-565-567-868-172130-
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-
901 AM CDT WED SEP 17 2025
SHEBOYGAN WI TO PENTWATER MI NORTH...
REST OF TODAY
SOUTHWEST WINDS 5 TO 10 KT INCREASING TO 10 TO
15 KT. WAVES 1 TO 2 FT.
TONIGHT
SOUTHWEST WINDS 5 TO 10 KT VEERING TO NORTH. CHANCE OF
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE EVENING. WAVES
1 TO 2 FT.
THURSDAY
NORTH WINDS 5 TO 10 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 3 FT.
THURSDAY NIGHT
NORTHEAST WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
FRIDAY
EAST WINDS 10 TO 15 KT BECOMING NORTHEAST 10 TO 20 KT.
WAVES 1 TO 3 FT.
FRIDAY NIGHT
EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST. WAVES
2 TO 4 FT BUILDING TO 3 TO 5 FT.
SATURDAY
SOUTHEAST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT.
SUNDAY
SOUTH WINDS 10 TO 20 KT. CHANCE OF SHOWERS. WAVES 2 TO
4 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-172130-
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-
901 AM CDT WED SEP 17 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH...
REST OF TODAY
SOUTHEAST WINDS LESS THAN 10 KT VEERING TO
SOUTHWEST. WAVES 1 FT OR LESS.
TONIGHT
WEST WINDS 5 TO 10 KT BACKING TO SOUTH. WAVES 1 TO
2 FT.
THURSDAY
SOUTHWEST WINDS 5 TO 10 KT BECOMING WEST LATE IN THE
MORNING, THEN BECOMING NORTH 10 TO 20 KT IN THE AFTERNOON. WAVES
1 TO 3 FT.
THURSDAY NIGHT
NORTH WINDS 10 TO 20 KT BECOMING NORTHEAST.
WAVES 2 TO 4 FT.
FRIDAY
EAST WINDS 10 TO 15 KT BECOMING NORTHEAST. WAVES 2 TO
4 FT.
FRIDAY NIGHT
NORTHEAST WINDS 10 TO 20 KT BECOMING EAST 15 TO
25 KT. WAVES 3 TO 5 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO
8 FT.
SATURDAY
SOUTHEAST WINDS 10 TO 20 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
SUNDAY
SOUTH WINDS 10 TO 20 KT. CHANCE OF SHOWERS. WAVES 3 TO
5 FT.
LMZ761-172130-
MAFOR 1716/
MICHIGAN NORTH 12510 11500 11600 11700 13800. A CHANCE OF SHOWERS
THIS EVENING. WAVES 1 FOOT OR LESS.
MICHIGAN SOUTH 11400 11500 12600 13400 11500. WAVES 1 FOOT OR
LESS.
SHEPPARD
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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