173
FZUS63 KMKX 271654
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1153 AM CDT MON JUL 27 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
SEVERE STORMS ARE EXPECTED THIS MORNING AND AFTERNOON. VERY
STRONG WINDS, AND HAIL ARE POSSIBLE WITH THESE STORMS. STORMS WILL
MOVE NORTH TO SOUTH ACROSS THE LAKE AHEAD OF A COLD FRONT THAT
WILL PROGRESS NORTH TO SOUTH THIS AFTERNOON HOURS. NORTHERLY
WINDS ARE EXPECTED BEHIND THE FRONT, WITH GUSTS AROUND 30 KT
EXPECTED. GUSTS TO GALE FORCE CANNOT BE RULED OUT AS LOW PRESSURE
DEEPENS TO 29.5 INCHES OVER THE EASTERN GREAT LAKES TUESDAY. WINDS
WILL REMAIN NORTHERLY THROUGH WEDNESDAY AS HIGH PRESSURE AROUND
30.0 INCHES BUILDS INTO THE NORTHERN GREAT LAKES, THEN WILL BECOME
LIGHTER AND MORE VARIABLE INTO THURSDAY AND FRIDAY AS HIGH
PRESSURE BUILDS OVERHEAD.
LMZ261-362-364-366-280300-
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-
1154 AM CDT MON JUL 27 2026
ROCK ISLAND PASSAGE TO CHARLEVOIX MI NORTH...
TONIGHT
NORTH WINDS 10 TO 20 KT INCREASING TO 30 KT. PATCHY
FOG IN THE EVENING. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING. WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO
9 FT.
TUESDAY
NORTH WINDS TO 30 KT. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT.
TUESDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO
4 FT.
WEDNESDAY
NORTH WINDS 10 TO 20 KT BECOMING NORTHWEST 15 TO
25 KT. WAVES 1 TO 3 FT.
WEDNESDAY NIGHT
SOUTH WINDS 10 TO 20 KT DIMINISHING TO 5 TO
10 KT. WAVES 1 TO 3 FT SUBSIDING TO 1 FT OR LESS.
THURSDAY
SOUTH WINDS 10 TO 15 KT. WAVES 1 FT OR LESS.
FRIDAY
SOUTHWEST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 2 FT.
LMZ563-565-567-280300-
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-
1154 AM CDT MON JUL 27 2026
ROCK ISLAND PASSAGE TO CHARLEVOIX MI SOUTH TO SHEBOYGAN WI TO
PENTWATER MI...
...SEVERE THUNDERSTORM WATCH 519 IN EFFECT UNTIL 3 PM CDT THIS
AFTERNOON...
TONIGHT
NORTH WINDS 10 TO 20 KT INCREASING TO 30 KT. PATCHY
FOG IN THE EVENING. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING. WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO
9 FT.
TUESDAY
NORTH WINDS TO 30 KT. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT.
TUESDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO
4 FT.
WEDNESDAY
NORTH WINDS 10 TO 20 KT BECOMING NORTHWEST 15 TO
25 KT. WAVES 1 TO 3 FT.
WEDNESDAY NIGHT
SOUTH WINDS 10 TO 20 KT DIMINISHING TO 5 TO
10 KT. WAVES 1 TO 3 FT SUBSIDING TO 1 FT OR LESS.
THURSDAY
SOUTH WINDS 10 TO 15 KT. WAVES 1 FT OR LESS.
FRIDAY
SOUTHWEST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 2 FT.
LMZ868-280300-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
1154 AM CDT MON JUL 27 2026
WILMETTE HARBOR IL TO ST. JOSEPH MI SOUTH TO ROCK ISLAND PASSAGE
TO CHARLEVOIX MI...
...SEVERE THUNDERSTORM WATCH 520 IN EFFECT UNTIL 7 PM CDT THIS
EVENING...
TONIGHT
NORTH WINDS 10 TO 20 KT INCREASING TO 30 KT. PATCHY
FOG IN THE EVENING. CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
EVENING. WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO
9 FT.
TUESDAY
NORTH WINDS TO 30 KT. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT.
TUESDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO
4 FT.
WEDNESDAY
NORTH WINDS 10 TO 20 KT BECOMING NORTHWEST 15 TO
25 KT. WAVES 1 TO 3 FT.
WEDNESDAY NIGHT
SOUTH WINDS 10 TO 20 KT DIMINISHING TO 5 TO
10 KT. WAVES 1 TO 3 FT SUBSIDING TO 1 FT OR LESS.
THURSDAY
SOUTH WINDS 10 TO 15 KT. WAVES 1 FT OR LESS.
FRIDAY
SOUTHWEST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 2 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-280300-
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-
1154 AM CDT MON JUL 27 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
...SEVERE THUNDERSTORM WATCH 520 IN EFFECT UNTIL 7 PM CDT THIS
EVENING...
TONIGHT
SOUTHWEST WINDS 15 TO 25 KT VEERING TO NORTH TO 30 KT.
CHANCE OF SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS IN THE
EVENING. WAVES 3 TO 5 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO
10 FT.
TUESDAY
NORTH WINDS TO 30 KT. WAVES 7 TO 10 FT OCCASIONALLY TO
13 FT.
TUESDAY NIGHT
NORTH GALES TO 35 KT DIMINISHING TO 15 TO 25 KT
OVERNIGHT. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT.
WEDNESDAY
NORTH WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 3 TO 5 FT.
WEDNESDAY NIGHT
NORTH WINDS 10 TO 20 KT BECOMING NORTHEAST
5 TO 10 KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
THURSDAY
SOUTH WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
WAVES 1 TO 2 FT.
FRIDAY
SOUTHWEST WINDS 10 TO 15 KT BECOMING SOUTH. CHANCE OF
SHOWERS. WAVES 1 TO 2 FT.
LMZ761-280300-
MAFOR 2722 AMD/
MICHIGAN NORTH...SEVERE THUNDERSTORM WATCH IN EFFECT...11830
19839 11830 19834 11840 19844 11840 12830 12840. WAVES 2 TO 4
FEET BUILDING TO 3 TO 6 FEET TONIGHT. WAVES 3 TO 6 FEET TUESDAY.
MICHIGAN SOUTH...SEVERE THUNDERSTORM WATCH IN EFFECT...11530
19539 11630 19636 11740 12840 11830 12840. WAVES 3 TO 5 FEET
BUILDING TO 5 TO 8 FEET TONIGHT. WAVES 5 TO 8 FEET TUESDAY.
WFO MKX
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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