588
FZUS63 KMKX 301943
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
243 PM CDT THU APR 30 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 30.2 INCHES CONTINUES TO SIT OVER CENTRAL
CANADA THROUGH THE END OF THE WEEK AND WILL BRING LIGHT AND
VARYING WINDS ACROSS LAKE MICHIGAN THROUGH FRIDAY. HIGH PRESSURE
BEGINS TO WORK ITS WAY SOUTHEASTWARD TRACKING ACROSS LAKE MICHIGAN
OVERNIGHT FRIDAY THROUGH THE DAY SATURDAY. WILL BEGIN TO SEE MORE
SOUTHERLY WINDS DEVELOP SATURDAY NIGHT AND PICK UP INTO SUNDAY AS
THE HIGH PRESSURE CONTINUES TO TRACK SOUTHWARD WHILE LOW PRESSURE
AROUND 29.4 INCHES TREKS ACROSS ONTARIO. THIS LOOKS TO DRAG A
COLD FRONT WEEK COLD FRONT ACROSS THE LAKE LATER SUNDAY TURNING
WINDS MORE WESTERLY BRIEFLY BEFORE ANOTHER LOW PRESSURE AROUND
29.1 INCHES DEVELOPS RIGHT BEHIND IT FOR MONDAY. EXPECTING A
STRONGER COLD FRONT TO MOVE ACROSS THE LAKE THROUGH THE DAY
MONDAY AND TURN WINDS NORTH-NORTHWESTERLY OVERNIGHT INTO TUESDAY.
LMZ261-362-364-366-563-565-567-868-010315-
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-
243 PM CDT THU APR 30 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
TONIGHT
WEST WINDS 10 TO 15 KT VEERING TO NORTH. ISOLATED RAIN
SHOWERS THIS EVENING. WAVES 1 TO 2 FT.
FRIDAY
NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST. SLIGHT
CHANCE OF RAIN SHOWERS IN THE AFTERNOON. WAVES 1 TO 3 FT.
FRIDAY NIGHT
NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 1 TO 3 FT.
SATURDAY
NORTHWEST WINDS 10 TO 15 KT BACKING TO SOUTHWEST
10 TO 20 KT. WAVES 1 TO 2 FT.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT
BUILDING TO 2 TO 4 FT.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KT. CHANCE OF RAIN SHOWERS IN
THE MORNING. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
SUNDAY NIGHT
SOUTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO
5 FT.
MONDAY
SOUTHWEST WINDS TO 30 KT INCREASING TO GALES TO 35 KT.
CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FT BUILDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
TUESDAY
WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST. WAVES 1 TO
3 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-010315-
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-
243 PM CDT THU APR 30 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TONIGHT
EAST WINDS 10 TO 15 KT BACKING TO NORTH. SCATTERED
RAIN SHOWERS THIS EVENING, THEN ISOLATED RAIN SHOWERS OVERNIGHT.
WAVES 1 TO 2 FT.
FRIDAY
NORTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 2 TO 4 FT.
FRIDAY NIGHT
NORTH WINDS 10 TO 20 KT DIMINISHING TO 5 TO
10 KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 2 FT.
SATURDAY
NORTH WINDS 10 TO 15 KT. WAVES 1 TO 2 FT.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 2 FT
BUILDING TO 2 TO 4 FT.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KT BECOMING SOUTH. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT.
SUNDAY NIGHT
SOUTHWEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
MONDAY
SOUTHWEST WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES
2 TO 4 FT BUILDING TO 3 TO 5 FT.
TUESDAY
NORTHWEST WINDS 10 TO 15 KT VEERING TO NORTHEAST.
CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT SUBSIDING TO 1 TO 3 FT.
LMZ761-010315-
MAFOR 3022/
MICHIGAN NORTH 11610 11710 14810 11810 11710. WAVES 2 FEET OR
LESS.
MICHIGAN SOUTH 11210 19216 11310 11700 11800 12810 12820. WAVES 2
FEET OR LESS TONIGHT. WAVES 1 TO 3 FEET FRIDAY.
WAGNER
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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