538
FZUS63 KMKX 161351
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
851 AM CDT FRI OCT 16 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 WILL DEEPEN TO AROUND 29.4 INCHES AS IT SHIFTS INTO
THE EASTERN GREAT LAKES TODAY. EXPECT NORTHWEST TO NORTH WINDS TO
STRENGTHEN TO HIGH-END GALES BY LATE THIS MORNING, AS A STRONG
HIGH PRESSURE SYSTEM AROUND 30.7 INCHES BUILDS INTO THE PLAINS. A
GALE WARNING REMAINS IN EFFECT FOR ALL OF THE OPEN WATERS OF LAKE
MICHIGAN LATER THIS MORNING INTO TONIGHT.
LAKE EFFECT SHOWERS AND A FEW THUNDERSTORMS ARE POSSIBLE TODAY
ALONG THE BACK SIDE OF DEPARTING LOW PRESSURE. A FEW WATERSPOUTS
ARE POSSIBLE IN THE SHOWERS AND THUNDERSTORMS, PARTICULARLY OVER
THE SOUTH HALF OF LAKE MICHIGAN.
AS THE HIGH SINKS TOWARD THE OHIO RIVER VALLEY ON SATURDAY,
STRONG LOW PRESSURE AROUND 29.0 INCHES WILL DEVELOP IN NORTHERN
MANITOBA INTO SUNDAY. THIS MAY BRING SOUTHWEST GALES TO FAR
NORTHERN PORTIONS OF LAKE MICHIGAN SATURDAY NIGHT INTO SUNDAY
NIGHT.
LMZ261-362-364-366-563-565-567-868-162115-
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-
851 AM CDT FRI OCT 16 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
..GALE WARNING IN EFFECT THROUGH LATE TONIGHT
REST OF TODAY
NORTH WINDS TO 30 KT INCREASING TO GALES TO
45 KT. RAIN SHOWERS THROUGH MID MORNING, THEN CHANCE OF RAIN
SHOWERS THIS AFTERNOON. SLIGHT CHANCE OF WATERSPOUTS THIS
AFTERNOON. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT BUILDING TO
14 TO 18 FT OCCASIONALLY TO 23 FT.
TONIGHT
NORTH GALES TO 40 KT BECOMING NORTHWEST 10 TO 20 KT.
WAVES 14 TO 18 FT OCCASIONALLY TO 23 FT SUBSIDING TO 6 TO 9 FT
OCCASIONALLY TO 12 FT.
SATURDAY
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST 15 TO 25 KT
LATE IN THE MORNING, THEN BECOMING SOUTHWEST TO 30 KT IN THE
AFTERNOON. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 5 TO
8 FT OCCASIONALLY TO 10 FT.
SATURDAY NIGHT
SOUTHWEST GALES TO 35 KT. WAVES 6 TO 9 FT
OCCASIONALLY TO 12 FT BUILDING TO 8 TO 11 FT OCCASIONALLY TO
14 FT.
SUNDAY
SOUTHWEST GALES TO 40 KT. WAVES 10 TO 14 FT
OCCASIONALLY TO 18 FT.
SUNDAY NIGHT
SOUTHWEST GALES TO 40 KT. WAVES 8 TO 12 FT
OCCASIONALLY TO 16 FT SUBSIDING TO 7 TO 10 FT OCCASIONALLY TO
13 FT.
MONDAY
SOUTHWEST 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
EAST WINDS 5 TO 10 KT. WAVES 1 TO 2 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-162115-
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-
851 AM CDT FRI OCT 16 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
..GALE WARNING IN EFFECT THROUGH LATE TONIGHT
REST OF TODAY
NORTHWEST WINDS TO 30 KT BECOMING NORTH GALES TO
45 KT. SLIGHT CHANCE OF WATERSPOUTS. SCATTERED SHOWERS WITH
ISOLATED THUNDERSTORMS THROUGH MID MORNING, THEN CHANCE OF
SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS THIS AFTERNOON. WAVES
8 TO 11 FT OCCASIONALLY TO 14 FT BUILDING TO 15 TO 20 FT
OCCASIONALLY TO 26 FT.
TONIGHT
NORTH GALES TO 45 KT DIMINISHING TO 15 TO 25 KT.
SLIGHT CHANCE OF WATERSPOUTS IN THE EVENING. CHANCE OF RAIN
SHOWERS. WAVES 15 TO 20 FT OCCASIONALLY TO 26 FT SUBSIDING TO
10 TO 14 FT OCCASIONALLY TO 18 FT.
SATURDAY
NORTH WINDS 10 TO 20 KT BACKING TO SOUTHWEST 15 TO
25 KT. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT SUBSIDING TO 3 TO
5 FT.
SATURDAY NIGHT
SOUTHWEST WINDS TO 30 KT. WAVES 6 TO 9 FT
OCCASIONALLY TO 12 FT.
SUNDAY
SOUTHWEST WINDS TO 30 KT. WAVES 8 TO 12 FT OCCASIONALLY
TO 16 FT.
SUNDAY NIGHT
SOUTH WINDS TO 30 KT BECOMING SOUTHWEST 15 TO
25 KT. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT SUBSIDING TO 5 TO
8 FT OCCASIONALLY TO 10 FT.
MONDAY
SOUTHWEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT SUBSIDING
TO 2 TO 4 FT.
TUESDAY
EAST WINDS 5 TO 10 KT. WAVES 1 FT OR LESS.
LMZ761-162115-
MAFOR 1616/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11850 12860 11850 11840
11830 11710 11620. A CHANCE OF SHOWERS THIS AFTERNOON. WAVES 6 TO
9 FEET BUILDING TO 12 TO 16 FEET THIS AFTERNOON. WAVES 12 TO 16
FEET SUBSIDING TO 5 TO 8 FEET TONIGHT. WAVES 3 TO 5 FEET
SUBSIDING TO 1 TO 3 FEET SATURDAY MORNING.
MICHIGAN SOUTH...GALE WARNING IN EFFECT...11756 12860 12850 11840
11820 11810. WAVES 7 TO 10 FEET BUILDING TO 15 TO 19 FEET THIS
AFTERNOON. WAVES 15 TO 20 FEET SUBSIDING TO 10 TO 13 FEET
TONIGHT. WAVES 6 TO 9 FEET SUBSIDING TO 4 TO 7 FEET SATURDAY
MORNING.
WOOD
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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