010
FZUS63 KMKX 151348
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
848 AM CDT TUE SEP 15 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
A GALE WARNING IS IN EFFECT THROUGH 1 PM CDT FOR THE NORTHERN
THIRD OF THE LAKE, WITH SOUTH TO SOUTHWEST WINDS OF 20-25 KT WITH
A FEW GUSTS UP TO 35 KT. ISOLATED GALES MAY CONTINUE FOR A FEW
HOURS AFTER THE EXPIRATION TIME, BUT WILL GRADUALLY DIMINISH AS
LOW PRESSURE AROUND 29.3 INCHES TRACKS INTO HUDSON BAY THIS
AFTERNOON. A TRAILING COLD FRONT WITH ISOLATED THUNDERSTORMS AHEAD
OF IT WILL SLOW AND WEAKEN AS IT MOVES ACROSS THE LAKE EARLY THIS
EVENING, TURNING WINDS TO NORTHWESTERLY. WINDS WILL SHIFT TO
NORTHEASTERLY BY EARLY WEDNESDAY MORNING AS HIGH PRESSURE AROUND
30.4 INCHES MOVES ACROSS THE NORTHERN GREAT LAKES. LIGHTER AND
VARIABLE WINDS WILL THEN PREVAIL WEDNESDAY NIGHT INTO FRIDAY UNTIL
STRONGER SOUTHERLY WINDS RETURN FRIDAY NIGHT AND SATURDAY AHEAD
OF ANOTHER LOW PRESSURE AREA APPROACHING FROM THE GREAT PLAINS.
LMZ261-362-364-563-152130-
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-
848 AM CDT TUE SEP 15 2026
STURGEON BAY WI TO POINT BETSIE MI NORTH...
..GALE WARNING IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON
REST OF TODAY
SOUTH GALES TO 35 KT BECOMING SOUTHWEST. SLIGHT
CHANCE OF SHOWERS THROUGH MID MORNING. WAVES 10 TO 14 FT
OCCASIONALLY TO 18 FT SUBSIDING TO 6 TO 9 FT OCCASIONALLY TO 12
FT.
TONIGHT
NORTHWEST WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT
LATE IN THE EVENING, THEN BECOMING NORTHWEST 10 TO 20 KT AFTER
MIDNIGHT BECOMING NORTH 10 TO 15 KT LATE. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT SUBSIDING TO 2 TO 4 FT.
WEDNESDAY
NORTH WINDS 5 TO 10 KT BECOMING NORTHEAST. WAVES
1 TO 3 FT SUBSIDING TO 1 FT OR LESS.
WEDNESDAY NIGHT
EAST WINDS 10 TO 15 KT BECOMING SOUTHEAST.
WAVES 1 FT OR LESS.
THURSDAY
SOUTH WINDS 10 TO 15 KT VEERING TO NORTHWEST. WAVES
NEARLY CALM.
THURSDAY NIGHT
NORTH WINDS 10 TO 15 KT BECOMING NORTHEAST 5 TO
10 KT. WAVES 1 TO 2 FT.
FRIDAY
EAST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SATURDAY
SOUTHEAST WINDS TO 30 KT. SHOWERS LIKELY WITH A
CHANCE OF THUNDERSTORMS. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
LMZ366-565-567-868-152130-
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-
848 AM CDT TUE SEP 15 2026
STURGEON BAY WI TO POINT BETSIE MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...
REST OF TODAY
SOUTH WINDS TO 30 KT BECOMING SOUTHWEST, THEN
DIMINISHING TO 15 TO 25 KT LATE. CHANCE OF SHOWERS AND SLIGHT
CHANCE OF THUNDERSTORMS THROUGH MID MORNING. WAVES 10 TO 14 FT
OCCASIONALLY TO 18 FT SUBSIDING TO 6 TO 9 FT OCCASIONALLY TO 12
FT.
TONIGHT
WEST WINDS 10 TO 20 KT VEERING TO NORTH. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 2 TO 4 FT.
WEDNESDAY
NORTHEAST WINDS 10 TO 15 KT DIMINISHING TO 5 TO
10 KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
WEDNESDAY NIGHT
EAST WINDS 10 TO 15 KT BECOMING SOUTHEAST.
WAVES 1 TO 2 FT.
THURSDAY
NORTHEAST WINDS 10 TO 15 KT BECOMING NORTH. WAVES
1 TO 2 FT.
THURSDAY NIGHT
NORTHEAST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
FRIDAY
EAST WINDS 10 TO 15 KT. CHANCE OF SHOWERS. WAVES 1 TO
3 FT.
SATURDAY
SOUTHEAST WINDS TO 30 KT BECOMING SOUTH. SHOWERS WITH
A CHANCE OF THUNDERSTORMS. WAVES 8 TO 11 FT OCCASIONALLY TO 14
FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-152130-
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-
848 AM CDT TUE SEP 15 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
REST OF TODAY
SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 15 TO
25 KT. SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS THROUGH MID
MORNING, THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THIS
AFTERNOON. WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT SUBSIDING TO
7 TO 10 FT OCCASIONALLY TO 13 FT.
TONIGHT
NORTHWEST WINDS 10 TO 20 KT VEERING TO NORTHEAST.
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE EVENING, THEN
SLIGHT CHANCE OF SHOWERS OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT SUBSIDING TO 3 TO 5 FT.
WEDNESDAY
NORTHEAST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. CHANCE OF SHOWERS IN THE MORNING. WAVES 3 TO 5 FT
SUBSIDING TO 2 TO 4 FT.
WEDNESDAY NIGHT
EAST WINDS 10 TO 20 KT BECOMING SOUTHEAST
10 TO 15 KT. CHANCE OF SHOWERS. WAVES 1 TO 3 FT.
THURSDAY
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH. CHANCE OF
SHOWERS IN THE MORNING. WAVES 1 TO 2 FT.
THURSDAY NIGHT
NORTHEAST WINDS 10 TO 20 KT DIMINISHING TO
10 TO 15 KT. WAVES 2 TO 4 FT.
FRIDAY
EAST WINDS 10 TO 15 KT. CHANCE OF SHOWERS. WAVES 3 TO
5 FT.
SATURDAY
SOUTH WINDS TO 30 KT. SHOWERS LIKELY WITH A CHANCE OF
THUNDERSTORMS. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT.
LMZ761-152130-
MAFOR 1516/
MICHIGAN NORTH...GALE WARNING IN EFFECT...12550 11640 11720 12820
11810 11110. A CHANCE OF SHOWERS LATE THIS MORNING. WAVES 7 TO 11
FEET SUBSIDING TO 6 TO 9 FEET THIS AFTERNOON. WAVES 4 TO 7 FEET
SUBSIDING TO 1 TO 3 FEET TONIGHT. WAVES 1 TO 3 FEET WEDNESDAY
MORNING.
MICHIGAN SOUTH 12540 11620 11720 12820 12120. A CHANCE OF SHOWERS
WEDNESDAY MORNING. WAVES 7 TO 10 FEET SUBSIDING TO 5 TO 8 FEET
THIS AFTERNOON. WAVES 3 TO 6 FEET SUBSIDING TO 2 TO 4 FEET
TONIGHT. WAVES 2 TO 4 FEET WEDNESDAY MORNING.
SHEPPARD
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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