494
FZUS63 KMKX 062042
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
242 PM 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 29.5 INCHES OVER SOUTHEASTERN 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, BRINGING BRISK
NORTHWESTERLY WINDS THROUGH SATURDAY MORNING. AN ADDITIONAL LOW
PRESSURE SYSTEM DEVELOPS OVER THE NORTHERN PLAINS INTO FRIDAY
NIGHT, PROGRESSING SOUTHWARD INTO ILLINOIS SATURDAY. GALES MAY
DEVELOP AGAIN SUNDAY ACROSS THE SOUTHERN HALF OF THE OPEN WATERS AS
THIS LOW DEEPENS OVER ILLINOIS. NORTHWESTERLY WINDS SLOWLY WEAKEN
THROUGH MONDAY, BECOMING SOUTHWESTERLY INTO TUESDAY AS LOW
PRESSURE PROGRESSES ACROSS ONTARIO. GALES ARE POSSIBLE ONCE AGAIN
ON TUESDAY.
LMZ261-362-364-366-563-565-567-868-070415-
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-
242 PM CST THU NOV 6 2025
SHEBOYGAN WI TO PENTWATER MI NORTH...
...GALE WARNING IN EFFECT FROM 8 PM CST THIS EVENING THROUGH LATE
TONIGHT...
TONIGHT
SOUTH GALES TO 35 KT BECOMING SOUTHWEST. SLIGHT CHANCE
OF SHOWERS THIS EVENING, THEN SHOWERS OVERNIGHT. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT BUILDING TO 8 TO 12 FT OCCASIONALLY TO
16 FT.
FRIDAY
SOUTHWEST WINDS TO 30 KT BECOMING NORTHWEST. SLIGHT
CHANCE OF RAIN SHOWERS IN THE MORNING, THEN CHANCE OF RAIN
SHOWERS IN THE AFTERNOON. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT
SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
FRIDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5 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.
SNOW AND RAIN LIKELY IN THE EVENING, THEN CHANCE OF SNOW
OVERNIGHT. WAVES 2 TO 4 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO
10 FT.
SUNDAY
NORTH WINDS TO 30 KT INCREASING TO GALES TO 35 KT. SNOW
LIKELY. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT BUILDING TO 7 TO
10 FT OCCASIONALLY TO 13 FT.
SUNDAY NIGHT
NORTH GALES TO 35 KT. SNOW LIKELY. WAVES 8 TO
12 FT OCCASIONALLY TO 16 FT.
MONDAY
NORTH WINDS TO 30 KT BECOMING NORTHWEST. SNOW SHOWERS
LIKELY. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT SUBSIDING TO 6 TO
9 FT OCCASIONALLY TO 12 FT.
TUESDAY
SOUTHWEST WINDS TO 30 KT INCREASING TO GALES TO 35 KT.
CHANCE OF RAIN SHOWERS. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT
BUILDING TO 8 TO 12 FT OCCASIONALLY TO 16 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-070415-
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-
242 PM CST THU NOV 6 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH...
...GALE WARNING IN EFFECT FROM 8 PM CST THIS EVENING THROUGH LATE
TONIGHT...
TONIGHT
SOUTH GALES TO 35 KT BECOMING SOUTHWEST GALES TO
40 KT. SHOWERS OVERNIGHT. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT
BUILDING TO 8 TO 12 FT OCCASIONALLY TO 16 FT.
FRIDAY
SOUTHWEST WINDS TO 30 KT BECOMING WEST. WAVES 8 TO
11 FT OCCASIONALLY TO 14 FT SUBSIDING TO 6 TO 9 FT OCCASIONALLY
TO 12 FT.
FRIDAY NIGHT
NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH 10 TO
20 KT. CHANCE OF RAIN. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT
SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
SATURDAY
NORTHEAST WINDS 10 TO 15 KT INCREASING TO 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
NORTHEAST WINDS TO 30 KT BECOMING NORTH GALES
TO 35 KT. RAIN IN THE EVENING, THEN RAIN AND SNOW LIKELY
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 8 TO
11 FT OCCASIONALLY TO 14 FT.
SUNDAY
NORTH GALES TO 35 KT BECOMING NORTHWEST GALES TO 40 KT.
RAIN AND SNOW LIKELY IN THE MORNING, THEN SNOW LIKELY IN THE
AFTERNOON. WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT.
SUNDAY NIGHT
NORTH GALES TO 40 KT. SNOW LIKELY. WAVES 12 TO
16 FT OCCASIONALLY TO 21 FT.
MONDAY
NORTHWEST GALES TO 35 KT. CHANCE OF SNOW SHOWERS. WAVES
10 TO 14 FT OCCASIONALLY TO 18 FT SUBSIDING TO 8 TO 12 FT
OCCASIONALLY TO 16 FT.
TUESDAY
SOUTHWEST GALES TO 40 KT. WAVES 8 TO 11 FT
OCCASIONALLY TO 14 FT BUILDING TO 10 TO 14 FT OCCASIONALLY TO
18 FT.
LMZ761-070415-
MAFOR 0623/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11440 11450 11456 11556
11540 11630 11730 11740. WAVES 2 TO 4 FEET BUILDING TO 7 TO 11
FEET TONIGHT. WAVES 7 TO 10 FEET SUBSIDING TO 3 TO 6 FEET FRIDAY.
MICHIGAN SOUTH...GALE WARNING IN EFFECT...11440 11450 11456 11556
11540 13630. WAVES 2 TO 4 FEET BUILDING TO 7 TO 11 FEET TONIGHT.
WAVES 6 TO 10 FEET SUBSIDING TO 5 TO 8 FEET FRIDAY.
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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