313
FZUS63 KMKX 060805
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
305 AM CDT TUE OCT 6 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
SOUTH WINDS HAVE DEVELOP ACROSS THE LAKE AHEAD OF A LOW PRESSURE
AROUND 29.4 INCHES MOVING TOWARD THE HUDSON BAY. SOUTH SOUTHWEST
WINDS WILL INCREASE THIS MORNING LEADING TO GALES THIS AFTERNOON
AND EVENING ACROSS THE NORTHERN TWO THIRDS OF THE LAKE. GALES TO
40 KTS ARE EXPECTED. AS THE LOW APPROACHES THE HUDSON BAY TONIGHT,
A COLD FRONT WILL MOVE DOWN THE LAKE TURNING THE WINDS BRIEFLY TO
THE NORTHWEST WEDNESDAY MORNING. WEST TO NORTHWEST WINDS WILL
SETTLE ACROSS THE LAKE INTO THURSDAY AS HIGH PRESSURE AROUND 30.1
INCHES MOVES INTO THE NORTHERN PLAINS.
LMZ261-362-364-563-061515-
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-
305 AM CDT TUE OCT 6 2026
STURGEON BAY WI TO POINT BETSIE MI NORTH...
...GALE WARNING IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH
THIS EVENING...
TODAY
SOUTH WINDS TO 30 KT INCREASING TO GALES TO 40 KT.
CHANCE OF SHOWERS THIS MORNING. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT BUILDING TO 8 TO 12 FT OCCASIONALLY TO 16 FT.
TONIGHT
SOUTHWEST GALES TO 40 KT BECOMING WEST TO 30 KT AFTER
MIDNIGHT, THEN BECOMING NORTHWEST 10 TO 20 KT LATE. SLIGHT CHANCE
OF SHOWERS IN THE EVENING. WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT
SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
WEDNESDAY
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST. WAVES
3 TO 5 FT SUBSIDING TO 2 TO 4 FT.
WEDNESDAY NIGHT
NORTHWEST WINDS 10 TO 20 KT INCREASING TO
15 TO 25 KT. WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT.
THURSDAY
NORTHWEST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT.
THURSDAY NIGHT
NORTHWEST WINDS 15 TO 25 KT BECOMING WEST 10 TO
15 KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 2 FT.
FRIDAY
WEST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT. WAVES
1 TO 3 FT.
SATURDAY
SOUTH WINDS 15 TO 25 KT. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 12 FT.
LMZ366-565-567-669-868-870-061515-
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 SHEBOYGAN TO PORT WASHINGTON 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-
305 AM CDT TUE OCT 6 2026
STURGEON BAY WI TO POINT BETSIE MI SOUTH TO PORT WASHINGTON WI TO
WHITEHALL MI...
...GALE WARNING IN EFFECT FROM 1 PM CDT THIS AFTERNOON THROUGH
THIS EVENING...
TODAY
SOUTH WINDS TO 30 KT INCREASING TO GALES TO 35 KT. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 7 TO 10 FT
OCCASIONALLY TO 13 FT.
TONIGHT
SOUTHWEST GALES TO 35 KT DIMINISHING TO 30 KT LATE IN
THE EVENING, THEN BECOMING SOUTHWEST TO 30 KT AFTER MIDNIGHT
BECOMING NORTHWEST 15 TO 25 KT LATE. WAVES 7 TO 10 FT
OCCASIONALLY TO 13 FT SUBSIDING TO 5 TO 8 FT OCCASIONALLY TO
10 FT.
WEDNESDAY
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
WEDNESDAY NIGHT
WEST WINDS 10 TO 20 KT BECOMING NORTHWEST.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
THURSDAY
NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
THURSDAY NIGHT
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST 10 TO
15 KT. WAVES 2 TO 4 FT.
FRIDAY
WEST WINDS 10 TO 20 KT. WAVES 1 TO 3 FT.
SATURDAY
SOUTH WINDS TO 30 KT. WAVES 6 TO 9 FT OCCASIONALLY TO
12 FT BUILDING TO 7 TO 10 FT OCCASIONALLY TO 13 FT.
LMZ080-671-673-675-777-779-872-874-876-878-061515-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 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-
305 AM CDT TUE OCT 6 2026
PORT WASHINGTON WI TO WHITEHALL MI SOUTH...
TODAY
SOUTH WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES 3 TO
5 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO 12 FT.
TONIGHT
SOUTH WINDS TO 30 KT BECOMING WEST 15 TO 25 KT. WAVES
6 TO 9 FT OCCASIONALLY TO 12 FT SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
WEDNESDAY
WEST 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.
WEDNESDAY NIGHT
WEST WINDS 10 TO 20 KT BECOMING NORTHWEST.
WAVES 3 TO 5 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
THURSDAY
NORTHWEST WINDS 10 TO 20 KT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
THURSDAY NIGHT
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST 10 TO
15 KT. WAVES 2 TO 4 FT.
FRIDAY
WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST. WAVES 1 TO
3 FT.
SATURDAY
SOUTH WINDS TO 30 KT. WAVES 6 TO 9 FT OCCASIONALLY TO
12 FT.
LMZ761-061515-
MAFOR 0610/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11430 11440 12450 13550
11630. A CHANCE OF SHOWERS THIS MORNING. WAVES 1 TO 3 FEET
BUILDING TO 8 TO 11 FEET TODAY. WAVES 7 TO 11 FEET SUBSIDING TO 3
TO 6 FEET TONIGHT.
MICHIGAN SOUTH...GALE WARNING IN EFFECT...12430 12440 11450 12540
11630. WAVES 1 TO 3 FEET BUILDING TO 6 TO 9 FEET TODAY. WAVES 5
TO 9 FEET SUBSIDING TO 4 TO 7 FEET TONIGHT.
PATTERSON
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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