025
FZUS63 KMKX 080740
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
240 AM CDT THU MAY 8 2025
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 30.5 INCHES CENTERED OVER HUDSON BAY THIS MORNING
WILL CONTINUE TO BUILD SOUTH TOWARD LAKE MICHIGAN TODAY. NORTH TO
NORTHEAST WINDS WILL REMAIN GUSTY AT TIMES, WITH ELEVATED WAVES
ACROSS THE SOUTHERN HALF OF THE LAKE. WINDS WILL EASE TONIGHT AS
THE HIGH MOVES OVERHEAD AND WEAKENS TO 30.3 INCHES. THAT HIGH WILL
REMAIN OVER THE LAKE THROUGH FRIDAY.
A WEAK COLD FRONT WILL PASS THROUGH THE REGION ON SATURDAY, WITH A
CORRESPONDING INCREASE IN NORTH WINDS AS THE FRONT PASSES. WINDS
THEN TURN TO THE SOUTHEAST AND THEN SOUTH ON SUNDAY, AS THE HIGH
SHIFTS INTO THE NORTHEAST AND A BROAD AREA OF LOW PRESSURE BEGINS
TO DEVELOP IN THE NORTHERN HIGH PLAINS.
LMZ261-362-364-366-563-565-567-868-081515-
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 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 PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
240 AM CDT THU MAY 8 2025
SHEBOYGAN WI TO PENTWATER MI NORTH...
TODAY
NORTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 3 TO 5 FT.
TONIGHT
NORTHEAST WINDS 10 TO 20 KT DIMINISHING TO 5 TO 10 KT
AFTER MIDNIGHT, THEN BECOMING EAST LATE. WAVES 3 TO 5 FT
SUBSIDING TO 1 TO 3 FT.
FRIDAY
SOUTH WINDS LESS THAN 10 KT BECOMING SOUTHWEST LATE IN
THE MORNING, THEN BECOMING 10 TO 15 KT EARLY IN THE AFTERNOON
BECOMING SOUTHWEST 10 TO 15 KT LATE. WAVES 1 TO 2 FT.
FRIDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SATURDAY
NORTH WINDS 10 TO 20 KT. WAVES 1 TO 3 FT BUILDING TO
2 TO 4 FT.
SATURDAY NIGHT
NORTH WINDS 10 TO 20 KT BECOMING EAST 5 TO
10 KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
SUNDAY
SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH 10 TO 20 KT.
WAVES 1 TO 2 FT BUILDING TO 1 TO 3 FT.
MONDAY
SOUTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-081515-
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-
240 AM CDT THU MAY 8 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TODAY
NORTHEAST WINDS 15 TO 25 KT BECOMING NORTH. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT.
TONIGHT
NORTH WINDS 15 TO 25 KT BECOMING NORTHEAST 10 TO 20 KT
LATE IN THE EVENING, THEN BECOMING EAST 10 TO 15 KT OVERNIGHT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO 5 FT.
FRIDAY
NORTHEAST WINDS 5 TO 10 KT BACKING TO NORTHWEST. WAVES
1 TO 3 FT SUBSIDING TO 1 TO 2 FT.
FRIDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SATURDAY
WEST WINDS 10 TO 15 KT VEERING TO NORTH 10 TO 20 KT.
WAVES 1 TO 2 FT BUILDING TO 2 TO 4 FT.
SATURDAY NIGHT
NORTH WINDS 10 TO 20 KT BECOMING NORTHEAST
10 TO 15 KT. WAVES 2 TO 4 FT.
SUNDAY
EAST WINDS 5 TO 10 KT BECOMING SOUTHEAST 10 TO 15 KT.
WAVES 1 TO 3 FT.
MONDAY
SOUTHEAST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
LMZ761-081515-
MAFOR 0810/
MICHIGAN NORTH 11130 12120 11130 12120 11110 11100. WAVES 3 TO 5
FEET SUBSIDING TO 2 TO 4 FEET, THEN BUILDING TO 3 TO 5 FEET
TODAY. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET TONIGHT.
MICHIGAN SOUTH 12130 11820 12830 11120 11110 11210. WAVES 3 TO 6
FEET TODAY. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET TONIGHT.
BOXELL
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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