634
FZUS63 KMKX 210803
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
303 AM CDT SUN JUN 21 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 29.5 INCHES WILL TRACK EASTWARD FROM THE
CENTRAL PLAINS INTO CENTRAL ILLINOIS EARLY THIS EVENING, THEN INTO
OHIO BY MONDAY. THIS WILL BRING LIGHT EASTERLY WINDS THROUGH THE
DAYTIME HOURS TODAY, BECOMING BREEZY NORTHEAST WINDS OVER THE
SOUTHERN PORTIONS OF THE LAKE LATER TODAY INTO TONIGHT. LIGHTER
WINDS RETURN LATE MONDAY EVENING INTO TUESDAY AS HIGH PRESSURE
AROUND 30.1 INCHES BUILDS INTO THE REGION.
LMZ261-362-364-366-563-565-567-868-211515-
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-
303 AM CDT SUN JUN 21 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
TODAY
SOUTHEAST WINDS LESS THAN 10 KT BECOMING SOUTH LATE THIS
MORNING, THEN BECOMING 10 TO 15 KT EARLY THIS AFTERNOON BECOMING
SOUTH 10 TO 15 KT LATE. PATCHY FOG. WAVES 1 FT OR LESS.
TONIGHT
EAST WINDS 5 TO 10 KT BECOMING NORTHEAST LATE IN THE
EVENING, THEN INCREASING TO 10 TO 15 KT AFTER MIDNIGHT BECOMING
NORTH 10 TO 20 KT LATE. WAVES 1 TO 2 FT BUILDING TO 1 TO 3 FT.
MONDAY
NORTH WINDS 10 TO 20 KT INCREASING TO 30 KT. WAVES 3 TO
5 FT.
MONDAY NIGHT
NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 3 TO 5 FT SUBSIDING TO 1 TO 3 FT.
TUESDAY
NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST 10 TO
20 KT. WAVES 1 TO 2 FT.
TUESDAY NIGHT
NORTH WINDS 5 TO 10 KT VEERING TO EAST. WAVES
1 FT OR LESS.
WEDNESDAY
SOUTHEAST WINDS 10 TO 15 KT. CHANCE OF SHOWERS.
WAVES 1 TO 2 FT.
THURSDAY
NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST 10 TO
20 KT. WAVES 1 TO 2 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-211515-
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-
303 AM CDT SUN JUN 21 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TODAY
EAST WINDS LESS THAN 10 KT BECOMING SOUTHEAST 10 TO
20 KT. CHANCE OF SHOWERS THIS AFTERNOON. WAVES NEARLY CALM
BUILDING TO 1 TO 2 FT.
TONIGHT
EAST WINDS 15 TO 25 KT BECOMING NORTHEAST TO 30 KT.
SHOWERS LIKELY IN THE EVENING, THEN CHANCE OF SHOWERS OVERNIGHT.
WAVES 3 TO 5 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
MONDAY
NORTHEAST WINDS TO 30 KT BECOMING NORTH. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT.
MONDAY NIGHT
NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO
5 FT.
TUESDAY
NORTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 2 TO 4 FT.
TUESDAY NIGHT
NORTH WINDS 10 TO 15 KT BACKING TO SOUTHWEST.
WAVES 1 TO 2 FT.
WEDNESDAY
SOUTH WINDS 10 TO 15 KT. CHANCE OF SHOWERS. WAVES
1 TO 2 FT.
THURSDAY
WEST WINDS 10 TO 15 KT BECOMING NORTHWEST 10 TO
20 KT. WAVES 1 TO 2 FT.
LMZ761-211515-
MAFOR 2110/
MICHIGAN NORTH 12300 12410 11300 11100 12110. WAVES 2 FEET OR
LESS.
MICHIGAN SOUTH 11200 12300 11320 11336 11246 12140. WAVES 2 FEET
OR LESS TODAY. WAVES 2 TO 4 FEET BUILDING TO 3 TO 6 FEET TONIGHT.
SHEPPARD
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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