973
FZUS63 KMKX 170800
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
300 AM CDT SAT OCT 17 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
LOW PRESSURE AROUND 29.4 INCHES HAS MOVED WELL EAST OF THE REGION,
AS STRONG HIGH PRESSURE AROUND 30.6 INCHES REMAINS OVER THE
CENTRAL PLAINS BUT BEGINS TO NUDGE IN. SCATTERED SHOWERS WILL
LINGER THIS MORNING OVER THE SOUTHERN HALF OF LAKE MICHIGAN. A
FEW RUMBLES OF THUNDER AND SOME ISOLATED WATERSPOUT POTENTIAL WILL
REMAIN OVER THE SOUTH HALF OF LAKE MICHIGAN.
AS THE HIGH SHIFTS TOWARD THE OHIO RIVER VALLEY TODAY, STRONG LOW
PRESSURE AROUND 29.0 INCHES WILL DEVELOP IN SOUTH CENTRAL CANADA,
SHIFTING TOWARD AND INTO HUDSON BAY ON SUNDAY. THIS WILL LIKELY
BRING SOUTHWEST GALES TO FAR NORTHERN PORTIONS OF LAKE MICHIGAN
TONIGHT INTO SUNDAY NIGHT. GALE WARNING IS NOW IN EFFECT FROM 9Z
SUNDAY UNTIL 6Z MONDAY FOR THE NORTHERN THIRD OF LAKE MICHIGAN.
HIGH PRESSURE AROUND 30.5 INCHES SHOULD DEVELOP EAST NORTHEAST
OF THE REGION NEXT WEEK, BRINGING DRY CONDITIONS AND LIGHT TO
MODEST WINDS.
LMZ261-362-364-563-171500-
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-
300 AM CDT SAT OCT 17 2026
STURGEON BAY WI TO POINT BETSIE MI NORTH...
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH LATE SUNDAY
NIGHT...
TODAY
WEST WINDS 10 TO 20 KT INCREASING TO 30 KT LATE THIS
MORNING, THEN BECOMING SOUTHWEST GALES TO 35 KT THIS AFTERNOON.
WAVES 1 TO 3 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 12 FT.
TONIGHT
SOUTHWEST GALES TO 40 KT DIMINISHING TO GALES TO
35 KT. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT BUILDING TO 8 TO
12 FT OCCASIONALLY TO 16 FT.
SUNDAY
SOUTHWEST GALES TO 40 KT. WAVES 10 TO 14 FT
OCCASIONALLY TO 18 FT.
SUNDAY NIGHT
SOUTHWEST GALES TO 40 KT DIMINISHING TO GALES TO
35 KT. WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT SUBSIDING TO 7 TO
10 FT OCCASIONALLY TO 13 FT.
MONDAY
SOUTHWEST WINDS 10 TO 20 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
MONDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KT BACKING TO SOUTHEAST.
WAVES 1 TO 3 FT.
TUESDAY
SOUTHEAST 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 3 FT.
LMZ366-565-567-868-171500-
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-
300 AM CDT SAT OCT 17 2026
STURGEON BAY WI TO POINT BETSIE MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...
TODAY
WEST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT LATE
THIS MORNING, THEN BECOMING SOUTHWEST 15 TO 25 KT EARLY THIS
AFTERNOON INCREASING TO 30 KT LATE. WAVES 3 TO 5 FT BUILDING TO
4 TO 7 FT OCCASIONALLY TO 9 FT.
TONIGHT
SOUTHWEST WINDS TO 30 KT. WAVES 6 TO 9 FT OCCASIONALLY
TO 12 FT BUILDING TO 8 TO 11 FT OCCASIONALLY TO 14 FT.
SUNDAY
SOUTHWEST WINDS TO 30 KT INCREASING TO GALES TO 35 KT.
WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT.
SUNDAY NIGHT
SOUTHWEST GALES TO 35 KT DIMINISHING TO 15 TO
25 KT OVERNIGHT. WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT SUBSIDING
TO 6 TO 9 FT OCCASIONALLY TO 12 FT.
MONDAY
SOUTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
MONDAY NIGHT
SOUTH WINDS 10 TO 15 KT DIMINISHING TO LESS THAN
10 KT. WAVES 1 TO 2 FT.
TUESDAY
SOUTHEAST WINDS 5 TO 10 KT BECOMING SOUTH. WAVES 1 FT
OR LESS.
WEDNESDAY
SOUTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 3 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-171500-
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-
300 AM CDT SAT OCT 17 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TODAY
NORTH WINDS 10 TO 15 KT BECOMING WEST 10 TO 20 KT LATE
THIS MORNING, THEN BECOMING SOUTHWEST 15 TO 25 KT EARLY THIS
AFTERNOON INCREASING TO 30 KT LATE. WAVES 6 TO 9 FT OCCASIONALLY
TO 12 FT SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
TONIGHT
SOUTHWEST WINDS TO 30 KT. WAVES 7 TO 10 FT
OCCASIONALLY TO 13 FT.
SUNDAY
SOUTHWEST WINDS TO 30 KT BECOMING SOUTH GALES TO 35 KT.
WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT BUILDING TO 10 TO 14 FT
OCCASIONALLY TO 18 FT.
SUNDAY NIGHT
SOUTHWEST GALES TO 35 KT DIMINISHING TO 15 TO
25 KT OVERNIGHT. WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT SUBSIDING
TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
MONDAY
SOUTHWEST WINDS 10 TO 20 KT BECOMING SOUTH 10 TO 15 KT.
WAVES 3 TO 5 FT SUBSIDING TO 2 TO 4 FT.
MONDAY NIGHT
SOUTH WINDS 10 TO 15 KT BECOMING SOUTHEAST LESS
THAN 10 KT. WAVES 1 TO 2 FT.
TUESDAY
SOUTHEAST 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 3 FT.
LMZ761-171500-
MAFOR 1710/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11710 11630 15550.
WAVES 3 TO 5 FEET SUBSIDING TO 2 TO 4 FEET, THEN BUILDING TO 5 TO
8 FEET TODAY. WAVES 5 TO 9 FEET BUILDING TO 7 TO 11 FEET TONIGHT.
MICHIGAN SOUTH 11820 11810 11520 11530 14540. WAVES 7 TO 10 FEET
SUBSIDING TO 2 TO 4 FEET, THEN BUILDING TO 3 TO 6 FEET TODAY.
WAVES 5 TO 8 FEET BUILDING TO 6 TO 9 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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