278
FZUS63 KMKX 180201
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
901 PM 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
STRONG HIGH PRESSURE AROUND 30.6 INCHES WILL SLOWLY MOVE EAST
THROUGH THE OHIO RIVER VALLEY TONIGHT INTO SUNDAY. STRONG LOW
PRESSURE AROUND 29.2 INCHES WILL MOVE EASTWARD INTO HUDSON BAY
TONIGHT INTO SUNDAY WHILE DEEPENING TO AROUND 29.0 INCHES. THIS
WILL BRING SOUTHWEST GALES TO FAR NORTHERN PORTIONS OF LAKE
MICHIGAN LATER TONIGHT INTO SUNDAY NIGHT. A GALE WARNING IS IN
EFFECT DURING THIS PERIOD FOR THE NORTHERN THIRD OF LAKE MICHIGAN.
BUILDING WAVES ARE ALSO EXPECTED DURING THIS PERIOD.
HIGH PRESSURE AROUND 30.5 INCHES WILL THEN DEVELOP EAST-NORTHEAST
OF THE REGION NEXT WEEK, BRINGING DRY CONDITIONS AND LIGHT TO
MODEST WINDS.
LMZ261-362-364-563-180930-
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-
901 PM CDT SAT OCT 17 2026
STURGEON BAY WI TO POINT BETSIE MI NORTH...
...GALE WARNING IN EFFECT FROM 4 AM CDT SUNDAY THROUGH LATE
SUNDAY NIGHT...
REST OF TONIGHT
SOUTHWEST 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 30 KT.
WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT SUBSIDING TO 5 TO 8 FT
OCCASIONALLY TO 10 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
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 FT OR LESS.
WEDNESDAY
SOUTH WINDS 10 TO 15 KT BECOMING SOUTHWEST 10 TO
20 KT. WAVES 1 TO 2 FT.
THURSDAY
NORTHWEST WINDS 5 TO 10 KT BECOMING NORTH. WAVES 1 TO
2 FT.
LMZ366-565-567-868-180930-
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-
901 PM CDT SAT OCT 17 2026
STURGEON BAY WI TO POINT BETSIE MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...
REST OF 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. WAVES 8 TO 12 FT OCCASIONALLY
TO 16 FT.
SUNDAY NIGHT
SOUTHWEST WINDS TO 30 KT DIMINISHING TO 10 TO 20
KT. 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 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 1 FT
OR LESS.
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
WEST WINDS 5 TO 10 KT VEERING TO NORTHEAST 10 TO
15 KT. WAVES 1 FT OR LESS.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-180930-
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-
901 PM CDT SAT OCT 17 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
REST OF TONIGHT
SOUTHWEST WINDS TO 30 KT. WAVES 6 TO 9 FT
OCCASIONALLY TO 12 FT.
SUNDAY
SOUTHWEST WINDS TO 30 KT INCREASING TO GALES TO 35 KT.
WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT BUILDING TO 8 TO 12 FT
OCCASIONALLY TO 16 FT.
SUNDAY NIGHT
SOUTHWEST WINDS TO 30 KT DIMINISHING TO 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 BECOMING SOUTH 10 TO 15 KT.
WAVES 3 TO 5 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
SOUTHWEST WINDS 5 TO 10 KT BECOMING SOUTH 10 TO
15 KT. WAVES 1 FT OR LESS.
LMZ761-180930-
MAFOR 1804/
MICHIGAN NORTH...GALE WARNING IN EFFECT...16550. WAVES 6 TO 10
FEET BUILDING TO 8 TO 11 FEET OVERNIGHT. WAVES 9 TO 13 FEET
SUNDAY AND SUNDAY EVENING.
MICHIGAN SOUTH 14540 11540 11550 12540. WAVES 5 TO 9 FEET
OVERNIGHT. WAVES 6 TO 9 FEET BUILDING TO 8 TO 11 FEET SUNDAY.
WAVES 6 TO 10 FEET SUNDAY EVENING.
WFO MKX
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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