254
FZUS63 KMKX 300205
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
905 PM CDT SAT AUG 29 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 WILL CONTINUE TO MOVE EAST OF
THE LOWER GREAT LAKES TONIGHT, WHILE LOW PRESSURE DEEPENS TO
AROUND 29.6 INCHES IN THE CENTRAL GREAT PLAINS. THIS WILL SUPPORT
MODEST TO BREEZY SOUTHERLY WINDS. TONIGHT A WARM FRONT IS
EXPECTED TO LIFT NORTHWARD OVER THE LAKE, AND THE PRESENCE OF A
JET ALOFT MAY CAUSE SOME GUSTY SOUTHERLY WINDS TO 30 KNOTS OVER
THE SOUTH HALF OF THE LAKE ON SUNDAY.
BREEZY SOUTHERLIES THEN REMAIN INTO MONDAY AS THE LOW WILL LIFT
NORTHEAST FROM THE PLAINS TOWARD WESTERN LAKE SUPERIOR. SCATTERED
THUNDERSTORMS WILL OCCUR AT TIMES FROM TONIGHT INTO NEXT WEEK. A
WEAK COLD FRONT WILL FINALLY ARRIVE LATE TUESDAY NIGHT AND
WEDNESDAY WITH LIGHT NORTHERLY WINDS EVENTUALLY TAKING HOLD.
LMZ261-362-364-366-563-565-567-868-300915-
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-
905 PM CDT SAT AUG 29 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
REST OF TONIGHT
SOUTH WINDS 15 TO 25 KT. CHANCE OF SHOWERS AND
SLIGHT CHANCE OF THUNDERSTORMS. WAVES 3 TO 5 FT.
SUNDAY
SOUTH WINDS 10 TO 20 KT BECOMING SOUTHEAST. CHANCE OF
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
SUNDAY NIGHT
EAST WINDS 10 TO 15 KT BECOMING SOUTHEAST 10 TO
20 KT. CHANCE OF SHOWERS OVERNIGHT. WAVES 3 TO 5 FT SUBSIDING TO
2 TO 4 FT.
MONDAY
SOUTHEAST WINDS 10 TO 20 KT BECOMING SOUTH 15 TO 25 KT.
CHANCE OF SHOWERS. WAVES 3 TO 5 FT.
MONDAY NIGHT
SOUTH WINDS 15 TO 25 KT BECOMING WEST 10 TO 15 KT
OVERNIGHT. CHANCE OF SHOWERS OVERNIGHT. WAVES 3 TO 5 FT SUBSIDING
TO 2 TO 4 FT.
TUESDAY
SOUTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 3 FT.
TUESDAY NIGHT
SOUTH WINDS 10 TO 15 KT BECOMING SOUTHWEST 5 TO
10 KT. CHANCE OF SHOWERS. WAVES 1 TO 2 FT.
WEDNESDAY
SOUTHWEST WINDS 10 TO 15 KT VEERING TO NORTH. WAVES
1 TO 2 FT.
THURSDAY
NORTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 2 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-300915-
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-
905 PM CDT SAT AUG 29 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
REST OF TONIGHT
SOUTH WINDS 15 TO 25 KT. SLIGHT CHANCE OF
SHOWERS LATE THIS EVENING, THEN CHANCE OF SHOWERS AND
THUNDERSTORMS OVERNIGHT. WAVES 3 TO 5 FT.
SUNDAY
SOUTH WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT. CHANCE
OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE MORNING,
THEN SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
SUNDAY NIGHT
SOUTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 3 TO 5 FT SUBSIDING TO 2 TO 4 FT.
MONDAY
SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
CHANCE OF SHOWERS IN THE MORNING. WAVES 3 TO 5 FT.
MONDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 3 TO 5 FT SUBSIDING TO 2 TO 4 FT.
TUESDAY
SOUTHWEST WINDS 10 TO 15 KT BECOMING SOUTH. WAVES 1 TO
3 FT.
TUESDAY NIGHT
SOUTH WINDS 10 TO 15 KT BECOMING SOUTHWEST.
WAVES 1 TO 2 FT.
WEDNESDAY
SOUTHWEST WINDS 10 TO 15 KT BECOMING SOUTH 10 TO
20 KT. WAVES 1 TO 2 FT.
THURSDAY
NORTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 3 FT.
LMZ761-300915-
MAFOR 3004/
MICHIGAN NORTH 14430 11430 11320 12210. A CHANCE OF SHOWERS.
WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET OVERNIGHT. WAVES 3 TO 5
FEET SUNDAY. WAVES 2 TO 4 FEET SUNDAY EVENING.
MICHIGAN SOUTH 13430 12440 12430 11420. A CHANCE OF SHOWERS AND
THUNDERSTORMS OVERNIGHT. A CHANCE OF SHOWERS SUNDAY MORNING.
WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET OVERNIGHT. WAVES 3 TO 6
FEET SUNDAY. WAVES 2 TO 4 FEET SUNDAY EVENING.
QUIGLEY
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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