151
FZUS63 KMKX 301411
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
911 AM 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
NORTH-NORTHWEST WINDS WILL CONTINUE THROUGH THE END OF THE WEEK
AS LOW PRESSURE AROUND 29.6 INCHES SHIFTS INTO THE CANADIAN
MARITIMES AND HIGH PRESSURE BUILDS TO AROUND 30.2 INCHES INTO THE
NORTHERN GREAT PLAINS. WINDS WILL SHIFT SOUTH-SOUTHWESTERLY
SATURDAY INTO SUNDAY AS THE HIGH PRESSURE MOVES INTO THE OHIO
RIVER VALLEY AND LOW PRESSURE AROUND 29.5 INCHES FORMS OVER THE
HUDSON BAY. WINDS WILL BRIEFLY VEER WESTERLY SUNDAY NIGHT INTO
MONDAY AS A WEAK COLD FRONT CROSSES LAKE MICHIGAN. SHOWERS AND A
FEW THUNDERSTORMS WILL ACCOMPANY THE FRONT, WITH SEVERE WEATHER
NOT ANTICIPATED AT THIS TIME.
LOW PRESSURE NEAR 29.3 INCHES WILL DEVELOP NEAR LAKE SUPERIOR
MONDAY, LIFTING TOWARD THE SOUTHERN HUDSON BAY AND QUEBEC ON
TUESDAY. PROGRESSION OF THE LOW WILL BRING WEST-SOUTHWESTERLY
WINDS MONDAY NIGHT THROUGH WEDNESDAY. A COLD FRONT IS FORECAST TO
CROSS THE OPEN WATERS WEDNESDAY AFTERNOON, BRINGING A NORTHWEST
WIND SHIFT.
LMZ261-362-364-366-563-565-567-868-302115-
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-
911 AM CDT THU APR 30 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
REST OF TODAY
NORTHWEST WINDS 10 TO 15 KT BACKING TO
SOUTHWEST. ISOLATED RAIN SHOWERS LATE THIS MORNING, THEN
SCATTERED RAIN SHOWERS THIS AFTERNOON. WAVES 1 TO 2 FT.
TONIGHT
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH. ISOLATED
RAIN SHOWERS. WAVES 1 TO 2 FT.
FRIDAY
NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST 10 TO 20 KT.
WAVES 1 TO 3 FT.
FRIDAY NIGHT
NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 1 TO 2 FT.
SATURDAY
NORTHWEST WINDS 10 TO 20 KT BACKING TO SOUTHWEST.
WAVES 1 TO 2 FT.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 2 TO 4 FT.
MONDAY
SOUTHWEST WINDS 15 TO 25 KT INCREASING TO 30 KT. CHANCE
OF RAIN SHOWERS. WAVES 2 TO 4 FT BUILDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-302115-
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-
911 AM CDT THU APR 30 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
REST OF TODAY
NORTH WINDS 10 TO 15 KT VEERING TO NORTHEAST.
SCATTERED RAIN SHOWERS THIS AFTERNOON. WAVES 1 TO 2 FT.
TONIGHT
EAST WINDS 5 TO 10 KT BACKING TO NORTH. SCATTERED RAIN
SHOWERS IN THE 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 1 TO 3 FT.
FRIDAY NIGHT
NORTH WINDS 10 TO 15 KT DIMINISHING TO 5 TO
10 KT. WAVES 1 TO 3 FT.
SATURDAY
NORTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 2 FT.
SATURDAY NIGHT
SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST.
WAVES 1 TO 3 FT.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
MONDAY
SOUTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 3 TO 5 FT.
LMZ761-302115-
MAFOR 3016/
MICHIGAN NORTH 11610 11510 19516 11610 11710 14810. WAVES 2 FEET
OR LESS.
MICHIGAN SOUTH 11810 11110 19116 11200 11500 19506 11700 11800
12810. WAVES 2 FEET OR LESS.
WAGNER
EXPERIMENTAL MODERNIZED OPEN LAKE FORECAST IS AVAILABLE ONLINE AT
WEATHER.GOV/MKX/GLFTABLE
GRAPHICAL MARINE FORECASTS ARE AVAILABLE ONLINE AT:
WEATHER.GOV/GREATLAKES
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page