760
FZUS63 KMKX 201948
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
248 PM CDT SUN SEP 20 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
LOW PRESSURE AROUND 29.8 INCHES WILL MOVE FROM SOUTHERN ILLINOIS
INTO THE OHIO VALLEY TODAY INTO MONDAY. MEANWHILE, HIGH PRESSURE
AROUND 30.4 INCHES OVER WESTERN ONTARIO TODAY WILL MOVE EASTWARD
THROUGH MONDAY, REACHING QUEBEC BY MONDAY NIGHT. THE HIGH WILL
THEN LARGELY REMAIN IN PLACE INTO MID-WEEK, WHILE STRENGTHENING TO
AROUND 30.7 INCHES. GUSTY NORTHEAST WINDS ARE EXPECTED TODAY INTO
TONIGHT, BECOMING EAST AND REMAINING GUSTY MONDAY INTO WEDNESDAY.
A FEW GALE FORCE GUSTS MAY OCCUR TODAY INTO MONDAY, MAINLY OVER
SOUTHERN PORTIONS OF THE LAKE. BUILDING WAVES ARE EXPECTED OVER
WESTERN PORTIONS OF THE LAKE TODAY INTO THE MIDDLE OF THE WEEK.
LIGHTER EASTERLY WINDS SHOULD THEN LINGER FOR THURSDAY INTO
FRIDAY, AS THE HIGH PRESSURE SYSTEM SLOWLY MOVES FARTHER EAST.
LMZ261-362-364-366-563-565-567-868-210330-
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-
248 PM CDT SUN SEP 20 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
TONIGHT
NORTHEAST WINDS TO 30 KT BECOMING EAST 15 TO 25 KT.
WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT SUBSIDING TO 6 TO 9 FT
OCCASIONALLY TO 12 FT.
MONDAY
EAST WINDS 15 TO 25 KT BECOMING NORTHEAST TO 30 KT.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
MONDAY NIGHT
NORTHEAST WINDS TO 30 KT BECOMING EAST 15 TO
25 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 4 TO
6 FT OCCASIONALLY TO 8 FT.
TUESDAY
NORTHEAST WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT.
TUESDAY NIGHT
EAST WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT
OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 4 TO
6 FT OCCASIONALLY TO 8 FT.
WEDNESDAY
EAST WINDS 15 TO 25 KT BECOMING NORTHEAST. WAVES
3 TO 5 FT.
WEDNESDAY NIGHT
EAST WINDS 15 TO 25 KT BECOMING SOUTHEAST
10 TO 20 KT. WAVES 2 TO 4 FT.
THURSDAY
EAST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 3 FT.
FRIDAY
SOUTHEAST WINDS 5 TO 10 KT BECOMING EAST. WAVES 1 FT OR
LESS.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-210330-
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-
248 PM CDT SUN SEP 20 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TONIGHT
NORTHEAST WINDS TO 30 KT BECOMING EAST. CHANCE OF
SHOWERS THIS EVENING. WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT
SUBSIDING TO 7 TO 10 FT OCCASIONALLY TO 13 FT.
MONDAY
EAST WINDS TO 30 KT BECOMING NORTHEAST. SLIGHT CHANCE
OF SHOWERS IN THE MORNING. WAVES 7 TO 10 FT OCCASIONALLY TO
13 FT.
MONDAY NIGHT
NORTHEAST WINDS TO 30 KT DIMINISHING TO 15 TO
25 KT. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT.
TUESDAY
NORTHEAST WINDS TO 30 KT. WAVES 6 TO 9 FT OCCASIONALLY
TO 12 FT.
TUESDAY NIGHT
NORTHEAST WINDS TO 30 KT DIMINISHING TO 15 TO
25 KT. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
WEDNESDAY
NORTHEAST WINDS 15 TO 25 KT. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
WEDNESDAY NIGHT
EAST WINDS 10 TO 20 KT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
THURSDAY
EAST WINDS 10 TO 20 KT BECOMING NORTHEAST 10 TO
15 KT. WAVES 3 TO 5 FT.
FRIDAY
EAST WINDS 10 TO 15 KT BECOMING NORTHEAST. WAVES 1 TO
2 FT.
LMZ761-210330-
MAFOR 2022/
MICHIGAN NORTH 13140 13230 12130. WAVES 6 TO 10 FEET SUBSIDING TO
5 TO 8 FEET TONIGHT. WAVES 3 TO 6 FEET MONDAY.
MICHIGAN SOUTH 12140 14240 12140. A CHANCE OF SHOWERS THIS
EVENING. WAVES 7 TO 11 FEET SUBSIDING TO 6 TO 9 FEET TONIGHT.
WAVES 5 TO 9 FEET MONDAY.
DDV
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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