833
FZUS63 KMKX 081403
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
903 AM CDT WED APR 8 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 THIS MORNING. LOW PRESSURE AROUND 29.5 INCHES
TRACKING ALONG THE NORTHERN GREAT PLAINS AND CANADIAN BORDER WILL
TRACK NORTH OF LAKE SUPERIOR TONIGHT 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 TWO THIRDS OF THE LAKE.
MUCH LIGHTER WESTERLY WINDS ARE THEN EXPECTED ON THURSDAY IN THE
WAKE OF A COLD FRONT. LIGHT AND VARIABLE WINDS WILL PREVAIL INTO
SATURDAY, UNTIL BREEZY SOUTHERLY WINDS RETURN LATE IN THE WEEKEND.
LMZ261-362-364-366-563-565-567-868-082115-
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-
903 AM CDT WED APR 8 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
..GALE WARNING IN EFFECT THROUGH LATE TONIGHT
REST OF TODAY
SOUTH GALES TO 40 KT. SNOW SHOWERS LIKELY WITH A
CHANCE OF RAIN SHOWERS LATE THIS MORNING, THEN CHANCE OF RAIN
SHOWERS THIS AFTERNOON. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT
BUILDING TO 10 TO 14 FT OCCASIONALLY TO 18 FT.
TONIGHT
SOUTH GALES TO 40 KT BECOMING SOUTHWEST GALES TO 35 KT
AFTER MIDNIGHT, THEN DIMINISHING TO 15 TO 25 KT LATE. RAIN
SHOWERS IN THE EVENING, THEN SLIGHT 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 15 TO 25 KT BECOMING WEST 10 TO
20 KT. 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 EAST.
CHANCE OF RAIN SHOWERS OVERNIGHT. WAVES 1 TO 3 FT SUBSIDING TO
1 TO 2 FT.
FRIDAY
NORTH WINDS 5 TO 10 KT BECOMING NORTHWEST. WAVES 1 FT
OR LESS.
FRIDAY NIGHT
NORTHEAST WINDS 5 TO 10 KT VEERING TO SOUTH.
WAVES 1 FT OR LESS.
SATURDAY
SOUTH WINDS 5 TO 10 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.
LMZ669-671-673-675-870-872-874-876-082115-
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 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-
903 AM CDT WED APR 8 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH TO WINTHROP HARBOR IL TO SOUTH
HAVEN MI...
..GALE WARNING IN EFFECT THROUGH LATE TONIGHT
REST OF TODAY
SOUTH GALES TO 40 KT DIMINISHING TO GALES TO
35 KT. CHANCE OF RAIN SHOWERS LATE THIS MORNING. WAVES 7 TO 10 FT
OCCASIONALLY TO 13 FT BUILDING TO 8 TO 12 FT OCCASIONALLY TO
16 FT.
TONIGHT
SOUTH GALES TO 35 KT BECOMING SOUTHWEST TO 30 KT.
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
SOUTHWEST WINDS 10 TO 20 KT DIMINISHING TO 5 TO
10 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 1 TO
3 FT.
THURSDAY NIGHT
EAST WINDS 5 TO 10 KT BECOMING NORTHEAST. RAIN
SHOWERS. WAVES 1 TO 2 FT.
FRIDAY
NORTH WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
CHANCE OF RAIN SHOWERS IN THE MORNING. WAVES 1 TO 2 FT.
FRIDAY NIGHT
NORTHEAST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SATURDAY
EAST WINDS 5 TO 10 KT BECOMING SOUTHEAST. WAVES 1 FT
OR LESS.
SUNDAY
SOUTH WINDS TO 30 KT. CHANCE OF RAIN SHOWERS. WAVES
7 TO 10 FT OCCASIONALLY TO 13 FT.
LMZ080-777-779-878-082115-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 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 ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO
MID LAKE-
903 AM CDT WED APR 8 2026
WINTHROP HARBOR IL TO SOUTH HAVEN MI SOUTH...
REST OF TODAY
SOUTH WINDS TO 30 KT. SLIGHT CHANCE OF RAIN
SHOWERS LATE THIS MORNING. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
TONIGHT
SOUTH WINDS TO 30 KT BECOMING SOUTHWEST. SHOWERS
LIKELY WITH SLIGHT CHANCE OF THUNDERSTORMS OVERNIGHT. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT.
THURSDAY
SOUTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT LATE IN THE MORNING, THEN DIMINISHING TO 5 TO 10 KT EARLY
IN THE AFTERNOON BACKING TO SOUTHEAST LATE. CHANCE OF RAIN
SHOWERS IN THE MORNING. WAVES 3 TO 5 FT SUBSIDING TO 1 TO 2 FT.
THURSDAY NIGHT
NORTHEAST WINDS 5 TO 10 KT INCREASING TO 10 TO
15 KT. RAIN SHOWERS. WAVES 1 FT OR LESS.
FRIDAY
NORTHEAST WINDS 10 TO 15 KT BECOMING NORTH. RAIN
SHOWERS IN THE MORNING, THEN CHANCE OF RAIN SHOWERS IN THE
AFTERNOON. WAVES 1 TO 2 FT.
FRIDAY NIGHT
NORTHEAST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
SATURDAY
EAST WINDS 5 TO 10 KT BECOMING NORTHEAST. WAVES 1 FT
OR LESS.
SUNDAY
SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 3 TO 5 FT.
LMZ761-082115-
MAFOR 0816/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11457 12450 11456 11556
11540 11530 11630. WAVES 8 TO 12 FEET BUILDING TO 10 TO 14 FEET
THIS AFTERNOON. WAVES 10 TO 14 FEET SUBSIDING TO 5 TO 8 FEET
TONIGHT. WAVES 3 TO 6 FEET THURSDAY MORNING.
MICHIGAN SOUTH...GALE WARNING IN EFFECT...14450 11456 11556 11530
11510. WAVES 6 TO 9 FEET BUILDING TO 8 TO 11 FEET THIS AFTERNOON.
WAVES 7 TO 11 FEET SUBSIDING TO 5 TO 8 FEET TONIGHT. WAVES 3 TO 6
FEET THURSDAY MORNING.
KUROSKI
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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