153
FZUS63 KMKX 180826
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
326 AM CDT SUN OCT 18 2026
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
STRONG HIGH PRESSURE AROUND 30.6 INCHES WILL SLOWLY MOVE EAST
THROUGH THE NORTHEAST US TODAY. STRONG LOW PRESSURE AROUND 29.2
INCHES WILL MOVE EASTWARD INTO HUDSON BAY TODAY WHILE DEEPENING
TO AROUND 29.0 INCHES. THIS WILL BRING SOUTHWEST GALES TO FAR
NORTHERN PORTIONS OF LAKE MICHIGAN NOW INTO TONIGHT. A GALE
WARNING IS IN EFFECT DURING THIS PERIOD FOR THE NORTHERN THIRD OF
LAKE MICHIGAN BUT WE HAVE EXPANDED THE GALE WARNING SOUTHWARD A
BIT TO INCLUDE THE ENTIRE NORTH HALF AS WIND APPEAR LIKELY TO BE A
BIT MORE EXPANSIVE THAN ORIGINALLY EXPECTED. BUILDING WAVES ARE
ALSO EXPECTED DURING THIS PERIOD.
HIGH PRESSURE AROUND 30.5 INCHES WILL THEN DEVELOP EAST-NORTHEAST
OF THE REGION THIS WEEK, BRINGING DRY CONDITIONS AND LIGHT TO
MODEST WINDS.
LMZ261-362-364-563-181530-
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 ROCK ISLAND PASSAGE TO STURGEON BAY WI-
326 AM CDT SUN OCT 18 2026
STURGEON BAY WI TO POINT BETSIE MI NORTH...
..GALE WARNING IN EFFECT THROUGH LATE TONIGHT
TODAY
SOUTHWEST GALES TO 40 KT. WAVES 10 TO 14 FT OCCASIONALLY
TO 18 FT.
TONIGHT
SOUTHWEST GALES TO 40 KT DIMINISHING TO 15 TO 25 KT.
WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT SUBSIDING TO 6 TO 9 FT
OCCASIONALLY TO 12 FT.
MONDAY
WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST 10 TO 15 KT.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 2 TO 4 FT.
MONDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KT BACKING TO SOUTHEAST.
WAVES 1 TO 2 FT.
TUESDAY
SOUTHEAST WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
TUESDAY NIGHT
SOUTHEAST WINDS 5 TO 10 KT BECOMING SOUTH. WAVES
1 TO 2 FT.
WEDNESDAY
SOUTH WINDS 10 TO 15 KT BECOMING SOUTHWEST 10 TO
20 KT. WAVES 1 TO 2 FT.
THURSDAY
NORTHEAST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
WAVES 1 FT OR LESS.
LMZ366-565-567-868-181530-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
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-
326 AM CDT SUN OCT 18 2026
STURGEON BAY WI TO POINT BETSIE MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...
...GALE WARNING IN EFFECT FROM 7 AM CDT THIS MORNING THROUGH THIS
EVENING...
TODAY
SOUTHWEST GALES TO 35 KT. WAVES 8 TO 12 FT OCCASIONALLY
TO 16 FT.
TONIGHT
SOUTHWEST GALES TO 35 KT DIMINISHING TO 10 TO 20 KT.
WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT SUBSIDING TO 7 TO 10 FT
OCCASIONALLY TO 13 FT.
MONDAY
SOUTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT
LATE IN THE MORNING, THEN BECOMING SOUTHWEST 10 TO 15 KT EARLY IN
THE AFTERNOON BECOMING SOUTH 5 TO 10 KT LATE. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
MONDAY NIGHT
SOUTH WINDS 5 TO 10 KT DIMINISHING TO LESS THAN
10 KT. WAVES 1 TO 2 FT.
TUESDAY
SOUTHEAST WINDS 5 TO 10 KT BECOMING SOUTH. WAVES
NEARLY CALM.
TUESDAY NIGHT
SOUTH WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
WEDNESDAY
SOUTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 2 FT.
THURSDAY
NORTH WINDS 5 TO 10 KT BECOMING NORTHEAST 10 TO
15 KT. WAVES 1 FT OR LESS.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-181530-
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-
326 AM CDT SUN OCT 18 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TODAY
SOUTHWEST WINDS TO 30 KT BECOMING SOUTH GALES TO 35 KT.
WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT BUILDING TO 8 TO 12 FT
OCCASIONALLY TO 16 FT.
TONIGHT
SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 10 TO 20 KT.
WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
MONDAY
SOUTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT
LATE IN THE MORNING, THEN BECOMING SOUTHWEST 10 TO 15 KT EARLY IN
THE AFTERNOON BECOMING SOUTH LATE. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT SUBSIDING TO 1 TO 3 FT.
MONDAY NIGHT
SOUTH WINDS 5 TO 10 KT BECOMING SOUTHEAST. WAVES
1 TO 2 FT.
TUESDAY
SOUTHEAST WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
TUESDAY NIGHT
SOUTHEAST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
WEDNESDAY
SOUTH WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
THURSDAY
EAST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
WAVES 1 FT OR LESS.
LMZ761-181530-
MAFOR 1810/
MICHIGAN NORTH...GALE WARNING IN EFFECT...15550 11550 11540.
WAVES 8 TO 12 FEET BUILDING TO 10 TO 13 FEET TODAY. WAVES 9 TO 12
FEET SUBSIDING TO 5 TO 8 FEET TONIGHT.
MICHIGAN SOUTH 12540 12550 11450 11540 11530 11520. WAVES 6 TO 10
FEET BUILDING TO 9 TO 12 FEET TODAY. WAVES 6 TO 10 FEET SUBSIDING
TO 3 TO 6 FEET TONIGHT.
KUROSKI
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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