617
FZUS63 KMKX 020157
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
857 PM CDT TUE SEP 1 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
LIGHT WINDS, COMBINED WITH A LINGERING HUMID AIR MASS, WILL
SUPPORT AREAS OF FOG DEVELOPMENT ACROSS LAKE MICHIGAN THROUGH
TONIGHT. OFF AND ON THUNDERSTORMS REMAIN POSSIBLE THROUGH
WEDNESDAY AS A COLD FRONT LINGERS JUST TO THE NORTH OF THE OPEN
WATERS. WIDESPREAD SEVERE WEATHER ISN'T EXPECTED IN ANY
THUNDERSTORM ACTIVITY, THOUGH AN ISOLATED STRONGER CELL WITH HAIL
AND GUSTY WINDS CAN'T BE ENTIRELY RULED OUT.
LIGHT TO MODEST SOUTHERLY WINDS TODAY WILL SHIFT EAST-
NORTHEASTERLY THROUGH THE SECOND HALF OF THE WEEK AS 30.1 INCH
HIGH PRESSURE BUILDS OVER THE HUDSON BAY AND BROAD, 29.6 INCH LOW
PRESSURE MOVES INTO THE NORTHERN GREAT PLAINS. AN UNSETTLED
PATTERN FEATURING MULTIPLE ADDITIONAL THUNDERSTORM CHANCES WILL
CONTINUE THROUGH AT LEAST FRIDAY NIGHT. SIMILAR TO EARLIER WEEK
STORMS, WIDESPREAD SEVERE WEATHER ISN'T ANTICIPATED, THOUGH
ISOLATED STRONGER STORMS WITH HAIL AND GUSTY WINDS ARE POSSIBLE.
LMZ261-362-364-366-563-565-567-868-020915-
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-
857 PM CDT TUE SEP 1 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
REST OF TONIGHT
SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST
LATE THIS EVENING, THEN DIMINISHING TO 10 TO 15 KT AFTER MIDNIGHT
BECOMING WEST LATE. PATCHY FOG THROUGH EARLY EVENING, THEN AREAS
OF DENSE FOG OVERNIGHT. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS OVERNIGHT. WAVES 1 TO 2 FT.
WEDNESDAY
NORTHWEST WINDS 5 TO 10 KT BECOMING NORTHEAST.
PATCHY FOG IN THE MORNING. CHANCE OF SHOWERS AND SLIGHT CHANCE OF
THUNDERSTORMS IN THE MORNING, THEN SLIGHT CHANCE OF SHOWERS IN
THE AFTERNOON. WAVES 1 FT OR LESS.
WEDNESDAY NIGHT
NORTHEAST WINDS 5 TO 10 KT DIMINISHING TO LESS
THAN 10 KT. CHANCE OF SHOWERS OVERNIGHT. WAVES 1 FT OR LESS.
THURSDAY
NORTHEAST WINDS 5 TO 10 KT. CHANCE OF SHOWERS. WAVES
1 FT OR LESS.
THURSDAY NIGHT
NORTHEAST WINDS 5 TO 10 KT BECOMING EAST.
CHANCE OF SHOWERS. WAVES 1 FT OR LESS.
FRIDAY
EAST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT. CHANCE
OF SHOWERS IN THE MORNING. WAVES 1 FT OR LESS.
FRIDAY NIGHT
NORTHEAST WINDS 10 TO 15 KT BECOMING EAST 5 TO
10 KT. CHANCE OF SHOWERS. WAVES 1 FT OR LESS.
SATURDAY
EAST WINDS 10 TO 15 KT BECOMING NORTHEAST. WAVES 1 FT
OR LESS.
SUNDAY
SOUTH WINDS 10 TO 15 KT BECOMING SOUTHWEST. WAVES 1 TO
2 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-020915-
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-
857 PM CDT TUE SEP 1 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
REST OF TONIGHT
SOUTH WINDS 10 TO 15 KT BECOMING SOUTHWEST.
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH EARLY EVENING,
THEN CHANCE OF SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES 1 TO
2 FT.
WEDNESDAY
SOUTHWEST WINDS 10 TO 15 KT BECOMING WEST. WAVES
1 TO 2 FT.
WEDNESDAY NIGHT
SOUTHWEST WINDS 10 TO 15 KT BACKING TO
NORTHEAST. CHANCE OF SHOWERS IN THE EVENING, THEN CHANCE OF
SHOWERS AND THUNDERSTORMS OVERNIGHT. WAVES 1 TO 3 FT.
THURSDAY
WEST WINDS 5 TO 10 KT VEERING TO NORTHEAST. CHANCE OF
SHOWERS. WAVES 1 TO 2 FT.
THURSDAY NIGHT
EAST WINDS 5 TO 10 KT. SHOWERS LIKELY
OVERNIGHT. WAVES 1 FT OR LESS.
FRIDAY
EAST WINDS 5 TO 10 KT BECOMING SOUTHEAST. CHANCE OF
SHOWERS. WAVES 1 TO 2 FT.
FRIDAY NIGHT
NORTHEAST WINDS 5 TO 10 KT BECOMING EAST 10 TO
15 KT. CHANCE OF SHOWERS AND THUNDERSTORMS. WAVES 1 TO 2 FT.
SATURDAY
EAST WINDS 10 TO 15 KT BECOMING NORTHEAST 5 TO 10 KT.
WAVES 1 TO 2 FT.
SUNDAY
SOUTHEAST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
LMZ761-020915-
MAFOR 0204/
MICHIGAN NORTH 11514 11600 19604 13700 13100. A CHANCE OF SHOWERS
WEDNESDAY MORNING. WAVES 2 FEET OR LESS.
MICHIGAN SOUTH 15510 11510 11410. A CHANCE OF SHOWERS AND
THUNDERSTORMS OVERNIGHT. WAVES 2 FEET OR LESS OVERNIGHT AND
WEDNESDAY. WAVES 1 TO 3 FEET WEDNESDAY EVENING.
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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