743
FZUS63 KMKX 061450
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
850 AM CST THU NOV 6 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
LOW PRESSURE AROUND 29.6 INCHES OVER SOUTHWESTERN NORTH DAKOTA
WILL PROGRESS EASTWARD INTO LAKE SUPERIOR TONIGHT, BRINGING GUSTY
SOUTH-SOUTHEASTERLY WINDS TO LAKE MICHIGAN THIS EVENING THROUGH
TONIGHT. A GALE WARNING IS IN EFFECT FOR THE OPEN WATERS FROM LATE
THIS EVENING THROUGH EARLY FRIDAY MORNING. A COLD FRONT WILL
CROSS THE LAKE INTO EARLY FRIDAY MORNING, SHIFTING WINDS TO
WESTERLY AND BRINGING GUSTS IN THE 20-30 KT RANGE. LOW PRESSURE
WILL DEEPEN TO 29.3 INCHES OVER ONTARIO FRIDAY, KEEPING
NORTHWESTERLY WINDS BRISK THROUGH SATURDAY MORNING. AN ADDITIONAL
LOW PRESSURE SYSTEM DEVELOPS OVER THE NORTHERN PLAINS INTO FRIDAY
NIGHT, PROGRESSING SOUTHWARD INTO ILLINOIS SATURDAY. GALE LOOK TO
BECOME LIKELY AGAIN INTO SUNDAY AS THIS LOW EXITS.
LMZ261-362-364-366-563-565-567-868-062230-
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-
850 AM CST THU NOV 6 2025
SHEBOYGAN WI TO PENTWATER MI NORTH...
...GALE WARNING IN EFFECT FROM 8 PM CST THIS EVENING THROUGH LATE
TONIGHT...
REST OF TODAY
WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST 10 TO
20 KT EARLY THIS AFTERNOON, THEN BECOMING SOUTH 15 TO 25 KT LATE.
WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT.
TONIGHT
SOUTH GALES TO 35 KT BECOMING SOUTHWEST. RAIN LIKELY
IN THE EVENING, THEN CHANCE OF RAIN OVERNIGHT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT BUILDING TO 8 TO 12 FT OCCASIONALLY TO
16 FT.
FRIDAY
SOUTHWEST WINDS TO 30 KT BECOMING NORTHWEST. CHANCE OF
RAIN. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT SUBSIDING TO 6 TO
9 FT OCCASIONALLY TO 12 FT.
FRIDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
SATURDAY
NORTH WINDS 10 TO 15 KT. CHANCE OF RAIN AND SNOW IN
THE AFTERNOON. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 2 FT.
SATURDAY NIGHT
NORTH WINDS 15 TO 25 KT INCREASING TO 30 KT.
RAIN AND SNOW LIKELY. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
BUILDING TO 6 TO 9 FT OCCASIONALLY TO 12 FT.
SUNDAY
NORTH WINDS TO 30 KT INCREASING TO GALES TO 40 KT. SNOW
AND RAIN LIKELY. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT.
MONDAY
NORTHWEST WINDS TO 30 KT. CHANCE OF SNOW. WAVES 8 TO
11 FT OCCASIONALLY TO 14 FT SUBSIDING TO 6 TO 9 FT OCCASIONALLY
TO 12 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-062230-
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-
850 AM CST THU NOV 6 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH...
...GALE WARNING IN EFFECT FROM 8 PM CST THIS EVENING THROUGH LATE
TONIGHT...
REST OF TODAY
WEST WINDS LESS THAN 10 KT BACKING TO SOUTH LATE
THIS MORNING, THEN BECOMING 10 TO 20 KT EARLY THIS AFTERNOON
INCREASING TO 15 TO 25 KT LATE. WAVES 2 TO 4 FT BUILDING TO 3 TO
5 FT.
TONIGHT
SOUTH GALES TO 35 KT BECOMING SOUTHWEST. SLIGHT CHANCE
OF RAIN IN THE EVENING, THEN CHANCE OF RAIN OVERNIGHT. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT BUILDING TO 8 TO 12 FT OCCASIONALLY TO
16 FT.
FRIDAY
SOUTHWEST WINDS TO 30 KT BECOMING WEST. CHANCE OF RAIN.
WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT SUBSIDING TO 6 TO 9 FT
OCCASIONALLY TO 12 FT.
FRIDAY NIGHT
NORTHWEST WINDS TO 30 KT BECOMING NORTH 10 TO
20 KT OVERNIGHT. CHANCE OF RAIN IN THE EVENING. WAVES 7 TO 10 FT
OCCASIONALLY TO 13 FT.
SATURDAY
NORTH WINDS 10 TO 15 KT BECOMING NORTHEAST 10 TO
20 KT. RAIN LIKELY IN THE AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT SUBSIDING TO 2 TO 4 FT.
SATURDAY NIGHT
NORTH WINDS TO 30 KT INCREASING TO GALES TO
40 KT. RAIN. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT BUILDING TO
10 TO 14 FT OCCASIONALLY TO 18 FT.
SUNDAY
NORTHWEST GALES TO 40 KT. RAIN AND SNOW LIKELY. WAVES
12 TO 16 FT OCCASIONALLY TO 21 FT.
MONDAY
NORTHWEST GALES TO 40 KT. CHANCE OF SNOW. WAVES 12 TO
16 FT OCCASIONALLY TO 21 FT.
LMZ761-062230-
MAFOR 0617/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11510 11430 11440 11450
11456 11550 11540 11640. WAVES 2 FEET OR LESS BUILDING TO 2 TO 4
FEET THIS AFTERNOON. WAVES 4 TO 7 FEET BUILDING TO 9 TO 12 FEET
TONIGHT. WAVES 7 TO 10 FEET SUBSIDING TO 5 TO 8 FEET FRIDAY
MORNING.
MICHIGAN SOUTH...GALE WARNING IN EFFECT...11410 11430 11440 11450
11456 11550 11540 11630. WAVES 2 FEET OR LESS BUILDING TO 2 TO 4
FEET THIS AFTERNOON. WAVES 4 TO 7 FEET BUILDING TO 9 TO 12 FEET
TONIGHT. WAVES 6 TO 10 FEET FRIDAY MORNING.
MH
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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