004
FZUS63 KMKX 080215
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
915 PM CDT TUE APR 7 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 AROUND 30.6 INCHES OVER THE LOWER GREAT LAKES WILL
CONTINUE EASTWARD TONIGHT, WHILE LOW PRESSURE AROUND 29.5 INCHES
TRACKS ALONG THE NORTHERN GREAT PLAINS AND CANADIAN BORDER,
THEN NORTH OF LAKE SUPERIOR WEDNESDAY NIGHT INTO THURSDAY
MORNING. THIS WILL RESULT IN VERY BREEZY SOUTHERLY WINDS OVER
LAKE MICHIGAN ON WEDNESDAY WITH GALE FORCE GUSTS UP TO 40 KT. A
GALE WARNING IS IN EFFECT FOR THE NORTHERN THREE QUARTERS OF THE
LAKE.
MUCH LIGHTER WESTERLY WINDS ARE THEN EXPECTED ON THURSDAY IN THE
WAKE OF A COLD FRONT. LIGHT AND VARIABLE WINDS WILL THEN PREVAIL
INTO SATURDAY, UNTIL BREEZY SOUTHERLY WINDS RETURN LATE IN THE
WEEKEND.
LMZ261-362-364-366-563-565-567-868-080930-
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-
915 PM CDT TUE APR 7 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
...GALE WARNING IN EFFECT FROM 7 AM CDT WEDNESDAY THROUGH LATE
WEDNESDAY NIGHT...
REST OF TONIGHT
SOUTH WINDS 10 TO 15 KT INCREASING TO 30 KT.
WAVES 1 TO 3 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
WEDNESDAY
SOUTH GALES TO 35 KT INCREASING TO GALES TO 40 KT.
CHANCE OF RAIN AND SNOW SHOWERS IN THE MORNING. WAVES 6 TO 9 FT
OCCASIONALLY TO 12 FT BUILDING TO 10 TO 14 FT OCCASIONALLY TO
18 FT.
WEDNESDAY NIGHT
SOUTH GALES TO 40 KT INCREASING TO GALES TO
45 KT LATE IN THE EVENING, THEN BECOMING SOUTHWEST GALES TO 35 KT
AFTER MIDNIGHT DIMINISHING TO 30 KT LATE. RAIN SHOWERS IN THE
EVENING, THEN CHANCE OF RAIN SHOWERS OVERNIGHT. WAVES 12 TO 16 FT
OCCASIONALLY TO 21 FT SUBSIDING TO 6 TO 9 FT OCCASIONALLY TO
12 FT.
THURSDAY
SOUTHWEST WINDS TO 30 KT BECOMING WEST. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5 FT.
THURSDAY NIGHT
NORTHWEST WINDS 10 TO 15 KT VEERING TO
NORTHEAST. CHANCE OF RAIN SHOWERS OVERNIGHT. WAVES 1 TO 3 FT
SUBSIDING TO 1 TO 2 FT.
FRIDAY
NORTH WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT. WAVES
1 TO 2 FT.
FRIDAY NIGHT
NORTHEAST WINDS 5 TO 10 KT VEERING TO SOUTHEAST.
WAVES 1 FT OR LESS.
SATURDAY
SOUTH WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
WAVES 1 TO 2 FT.
SUNDAY
SOUTH WINDS TO 30 KT. RAIN SHOWERS LIKELY. WAVES 6 TO
9 FT OCCASIONALLY TO 12 FT BUILDING TO 7 TO 10 FT OCCASIONALLY TO
13 FT.
LMZ669-671-673-870-872-874-080930-
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 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-
915 PM CDT TUE APR 7 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH TO WIND POINT WI TO HOLLAND
MI...
...GALE WARNING IN EFFECT FROM 7 AM CDT WEDNESDAY THROUGH LATE
WEDNESDAY NIGHT...
REST OF TONIGHT
SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH TO
30 KT. WAVES 1 TO 2 FT BUILDING TO 3 TO 5 FT.
WEDNESDAY
SOUTH WINDS TO 30 KT INCREASING TO GALES TO 40 KT.
CHANCE OF RAIN SHOWERS IN THE MORNING. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT BUILDING TO 8 TO 12 FT OCCASIONALLY TO
16 FT.
WEDNESDAY NIGHT
SOUTH GALES TO 40 KT BECOMING SOUTHWEST GALES
TO 35 KT AFTER MIDNIGHT, THEN DIMINISHING TO 30 KT LATE. CHANCE
OF RAIN SHOWERS IN THE EVENING, THEN RAIN SHOWERS OVERNIGHT.
WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT SUBSIDING TO 6 TO 9 FT
OCCASIONALLY TO 12 FT.
THURSDAY
WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5 FT.
THURSDAY NIGHT
EAST WINDS 5 TO 10 KT BECOMING NORTHEAST.
CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FT SUBSIDING TO 1 TO 2 FT.
FRIDAY
NORTH WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
CHANCE OF RAIN SHOWERS. WAVES 1 TO 2 FT.
FRIDAY NIGHT
NORTHEAST WINDS 10 TO 15 KT DIMINISHING TO 5 TO
10 KT. WAVES 1 TO 2 FT.
SATURDAY
EAST WINDS 5 TO 10 KT BECOMING SOUTHEAST. WAVES 1 TO
2 FT.
SUNDAY
SOUTH WINDS TO 30 KT. CHANCE OF RAIN SHOWERS. WAVES
6 TO 9 FT OCCASIONALLY TO 12 FT.
LMZ080-675-777-779-876-878-080930-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 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-
915 PM CDT TUE APR 7 2026
WIND POINT WI TO HOLLAND MI SOUTH...
REST OF TONIGHT
EAST WINDS 5 TO 10 KT INCREASING TO 10 TO
15 KT LATE THIS EVENING, THEN BECOMING SOUTHEAST 10 TO 20 KT
AFTER MIDNIGHT INCREASING TO 15 TO 25 KT LATE. SLIGHT CHANCE OF
RAIN SHOWERS OVERNIGHT. WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT.
WEDNESDAY
SOUTH WINDS TO 30 KT. CHANCE OF RAIN SHOWERS IN THE
MORNING. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO 5 TO
8 FT OCCASIONALLY TO 10 FT.
WEDNESDAY NIGHT
SOUTH WINDS TO 30 KT BECOMING SOUTHWEST. RAIN
SHOWERS LIKELY OVERNIGHT. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
THURSDAY
SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST 10 TO
15 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO
4 FT.
THURSDAY NIGHT
EAST WINDS 5 TO 10 KT BECOMING NORTHEAST.
CHANCE OF RAIN SHOWERS IN THE EVENING, THEN RAIN SHOWERS
OVERNIGHT. WAVES 1 TO 2 FT.
FRIDAY
NORTH WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT. RAIN
SHOWERS IN THE MORNING, THEN CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. WAVES 1 TO 2 FT.
FRIDAY NIGHT
NORTHEAST WINDS 10 TO 15 KT DIMINISHING TO 5 TO
10 KT. WAVES 1 TO 2 FT.
SATURDAY
EAST WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
SUNDAY
SOUTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.
CHANCE OF SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
LMZ761-080930-
MAFOR 0804/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11420 11430 11440 13450
11456 11466. A CHANCE OF SNOW SHOWERS WEDNESDAY MORNING. WAVES 1
TO 3 FEET BUILDING TO 3 TO 5 FEET OVERNIGHT. WAVES 5 TO 8 FEET
BUILDING TO 10 TO 14 FEET WEDNESDAY. WAVES 10 TO 14 FEET
WEDNESDAY EVENING.
MICHIGAN SOUTH...GALE WARNING IN EFFECT...11320 11330 11440 14450
11456. WAVES 1 TO 3 FEET BUILDING TO 3 TO 5 FEET OVERNIGHT. WAVES
4 TO 7 FEET BUILDING TO 9 TO 12 FEET WEDNESDAY. WAVES 8 TO 11
FEET WEDNESDAY EVENING.
GEHRING
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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