480
FZUS63 KMKX 191920
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
220 PM CDT TUE AUG 19 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
HIGHER PRESSURE AROUND 30.1 INCHES WILL REMAIN OVER THE GREAT
LAKES THROUGH FRIDAY. A BREEZY PERIOD OF NORTHERLY WINDS WILL
PERSIST TODAY THROUGH TOMORROW AS THE HIGH PRESSURE MOVES IN
BEHIND RETREATING LOW PRESSURE. LIGHT TO MODERATE NORTH WINDS ARE
THEN EXPECTED WEDNESDAY NIGHT INTO EARLY FRIDAY, BEFORE WINDS TURN
SOUTHERLY FRIDAY MORNING HEAD OF AN APPROACHING COLD FRONT.
LMZ261-362-364-366-563-565-567-868-200330-
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-
220 PM CDT TUE AUG 19 2025
SHEBOYGAN WI TO PENTWATER MI NORTH...
TONIGHT
NORTHEAST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 1 TO 3 FT.
WEDNESDAY
NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH 15 TO
25 KT. WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT.
WEDNESDAY NIGHT
NORTH WINDS 15 TO 25 KT BECOMING NORTHEAST
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 3 TO 5 FT
SUBSIDING TO 2 TO 4 FT.
THURSDAY
NORTHEAST WINDS 5 TO 10 KT BECOMING NORTH 10 TO
15 KT. WAVES 1 TO 2 FT.
THURSDAY NIGHT
EAST WINDS 10 TO 15 KT VEERING TO SOUTH 5 TO
10 KT. WAVES 1 TO 2 FT.
FRIDAY
SOUTHWEST WINDS 10 TO 20 KT. WAVES 1 TO 2 FT.
FRIDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST. CHANCE
OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 3 FT.
SATURDAY
WEST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 1 TO 3 FT.
SUNDAY
NORTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 2 TO 4 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-200330-
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-
220 PM CDT TUE AUG 19 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TONIGHT
NORTH WINDS 10 TO 20 KT. ISOLATED SPRINKLES. WAVES
3 TO 5 FT.
WEDNESDAY
NORTHEAST WINDS 10 TO 20 KT BECOMING NORTH 15 TO
25 KT. WAVES 3 TO 5 FT.
WEDNESDAY NIGHT
NORTH WINDS 15 TO 25 KT BECOMING NORTHEAST
10 TO 20 KT, THEN BECOMING EAST 10 TO 15 KT LATE. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT.
THURSDAY
NORTHEAST WINDS 10 TO 15 KT BECOMING NORTH 10 TO
20 KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
THURSDAY NIGHT
NORTHEAST WINDS 10 TO 20 KT BECOMING EAST 5 TO
10 KT OVERNIGHT. WAVES 1 TO 3 FT.
FRIDAY
SOUTH WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT. WAVES
1 TO 2 FT.
FRIDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KT BECOMING WEST 10 TO
20 KT. WAVES 1 TO 3 FT.
SATURDAY
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST. WAVES 2 TO
4 FT.
SUNDAY
NORTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
LMZ761-200330-
MAFOR 1922/
MICHIGAN NORTH 12120 12110 11120 11110 11810 11820. WAVES 1 TO 3
FEET TONIGHT. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET
WEDNESDAY.
MICHIGAN SOUTH 14820 11820 12120 11820. WAVES 2 TO 4 FEET.
CMILLER
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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