187
FZUS63 KMKX 120209
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
909 PM CDT MON MAY 11 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
HIGH PRESSURE OF 30.3 INCHES WILL CONTINUE TO SHIFT EAST TONIGHT.
LIGHT AND VARIABLE WINDS WILL BECOME SOUTH-SOUTHEASTERLY BY DAWN
TUESDAY, WITH GUSTY WINDS DEVELOPING OVER THE LAKE QUICKLY THROUGH
THE MORNING HOURS AS LOW PRESSURE OF 29.6 INCHES APPROACHES FROM
THE NORTHWEST. FORECAST MODELS SUGGEST THAT DESPITE A NEAR
SURFACE TEMPERATURE INVERSION OVER THE LAKE, SHOWERS OVER THE
LAKE WILL MIX DOWN GALES FROM THE LATE MORNING THROUGH THE MID
AFTERNOON. A GALE WARNING HAS BEEN ISSUED FOR THIS TIME PERIOD,
OVER ROUGHLY THE MIDDLE THIRD OF THE LAKE. GUSTY WINDS THEN EASE
A BIT DURING THE EARLY EVENING HOURS AS A COLD FRONT PASSES AND
WINDS BECOME NORTHWESTERLY. GUSTY NORTHWEST WINDS THEN RETURN
WEDNESDAY MORNING IN THE COLD ADVECTION REGIME BEHIND THE COLD
FRONT.
NORTH TO NORTHWEST WINDS THEN EASE WEDNESDAY NIGHT INTO THURSDAY
AS HIGH PRESSURE OF 30.1 INCHES MOVES OVER LAKE MICHIGAN.
LMZ261-362-120930-
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-
909 PM CDT MON MAY 11 2026
ROCK ISLAND PASSAGE TO CHARLEVOIX MI NORTH...
REST OF TONIGHT
SOUTHWEST WINDS 5 TO 10 KT BECOMING SOUTH
10 TO 15 KT. WAVES 1 TO 2 FT.
TUESDAY
SOUTH WINDS 10 TO 20 KT BECOMING SOUTHEAST TO 30 KT.
RAIN SHOWERS IN THE MORNING, THEN CHANCE OF RAIN SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON. WAVES 1 TO 3 FT
BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
TUESDAY NIGHT
SOUTHEAST WINDS 15 TO 25 KT VEERING TO
NORTHWEST. CHANCE OF RAIN SHOWERS IN THE EVENING, THEN CHANCE OF
RAIN SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO
8 FT.
WEDNESDAY
NORTHWEST WINDS TO 30 KT BECOMING NORTH. CHANCE OF
RAIN SHOWERS AND THUNDERSTORMS. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT.
WEDNESDAY NIGHT
NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO
10 TO 20 KT. WAVES 3 TO 5 FT SUBSIDING TO 2 TO 4 FT.
THURSDAY
NORTH WINDS 10 TO 15 KT BACKING TO WEST. WAVES 1 TO
3 FT SUBSIDING TO 1 FT OR LESS.
THURSDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KT BECOMING SOUTH 10 TO
20 KT. WAVES 1 TO 2 FT.
FRIDAY
SOUTH WINDS TO 30 KT BECOMING SOUTHWEST. WAVES 3 TO
5 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
SATURDAY
SOUTHWEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT.
LMZ364-366-563-565-567-669-671-868-870-872-120930-
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 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 PENTWATER TO MANISTEE MI 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-
909 PM CDT MON MAY 11 2026
ROCK ISLAND PASSAGE TO CHARLEVOIX MI SOUTH TO NORTH POINT LIGHT
WI TO GRAND HAVEN MI...
...GALE WARNING IN EFFECT FROM TUESDAY MORNING THROUGH TUESDAY
AFTERNOON...
REST OF TONIGHT
NORTHEAST WINDS 10 TO 15 KT VEERING TO
SOUTHEAST 10 TO 20 KT. WAVES 1 TO 3 FT SUBSIDING TO 1 TO 2 FT.
TUESDAY
SOUTH WINDS 15 TO 25 KT INCREASING TO GALES TO 40 KT,
THEN DIMINISHING TO GALES TO 35 KT LATE. CHANCE OF RAIN SHOWERS
IN THE MORNING, THEN CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE AFTERNOON. WAVES 2 TO 4 FT BUILDING TO 7 TO
10 FT OCCASIONALLY TO 13 FT.
TUESDAY NIGHT
SOUTHWEST WINDS TO 30 KT BECOMING WEST 15 TO
25 KT LATE IN THE EVENING, THEN BECOMING NORTHWEST 10 TO 20 KT
AFTER MIDNIGHT INCREASING TO 30 KT LATE. CHANCE OF RAIN SHOWERS
IN THE EVENING. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT SUBSIDING
TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
WEDNESDAY
NORTHWEST WINDS TO 30 KT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
WEDNESDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO
20 KT OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING
TO 3 TO 5 FT.
THURSDAY
NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
THURSDAY NIGHT
SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH
10 TO 20 KT. WAVES 1 TO 3 FT.
FRIDAY
SOUTH WINDS TO 30 KT. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 12 FT.
SATURDAY
SOUTHWEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT.
LMZ080-673-675-777-779-874-876-878-120930-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 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-
909 PM CDT MON MAY 11 2026
NORTH POINT LIGHT WI TO GRAND HAVEN MI SOUTH...
REST OF TONIGHT
NORTHEAST WINDS 10 TO 15 KT DIMINISHING TO
5 TO 10 KT LATE THIS EVENING, THEN BECOMING EAST AFTER MIDNIGHT
BECOMING SOUTHEAST LATE. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 2 FT.
TUESDAY
SOUTH WINDS 10 TO 20 KT INCREASING TO GALES TO 35 KT.
SLIGHT CHANCE OF RAIN SHOWERS IN THE MORNING, THEN CHANCE OF RAIN
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE AFTERNOON.
WAVES 1 TO 3 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
TUESDAY NIGHT
SOUTHWEST WINDS TO 30 KT BECOMING WEST LATE IN
THE EVENING, THEN DIMINISHING TO 10 TO 20 KT AFTER MIDNIGHT
BECOMING NORTHWEST 15 TO 25 KT LATE. CHANCE OF SHOWERS IN THE
EVENING. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
WEDNESDAY
NORTHWEST WINDS TO 30 KT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
WEDNESDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO
20 KT OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING
TO 3 TO 5 FT.
THURSDAY
NORTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
THURSDAY NIGHT
EAST WINDS 10 TO 15 KT BECOMING SOUTH. WAVES
1 TO 3 FT.
FRIDAY
SOUTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS. WAVES 3 TO
5 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
SATURDAY
SOUTHWEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT
SUBSIDING TO 2 TO 4 FT.
LMZ761-120930-
MAFOR 1204/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11300 11310 11420 12456
11450 11440 11520. WAVES 2 FEET OR LESS OVERNIGHT. WAVES 1 TO 3
FEET BUILDING TO 7 TO 10 FEET TUESDAY. WAVES 6 TO 9 FEET
SUBSIDING TO 4 TO 7 FEET TUESDAY EVENING.
MICHIGAN SOUTH...GALE WARNING IN EFFECT...11200 11310 11420 11440
12450 12540. A CHANCE OF SHOWERS TUESDAY AND TUESDAY EVENING.
WAVES 2 FEET OR LESS OVERNIGHT. WAVES 1 TO 3 FEET BUILDING TO 6
TO 9 FEET TUESDAY. WAVES 5 TO 8 FEET SUBSIDING TO 3 TO 6 FEET
TUESDAY EVENING.
CMILLER
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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