283
FZUS63 KMKX 310158
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
858 PM CDT THU OCT 30 2025
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 AROUND 29.8 INCHES OVER SOUTHWESTERN ONTARIO AND LOW
PRESSURE AROUND 29.4 INCHES OVER THE NORTHEAST U.S. WILL COMBINE
TO PRODUCE CONTINUED NORTHWESTERLY WINDS THROUGHOUT TONIGHT AND
FRIDAY. ON FRIDAY, A COLD FRONT FROM THE LOW IN ONTARIO WILL
PROGRESS NORTHWEST TO SOUTHEAST ACROSS THE OPEN WATERS, BRINGING
BRIEFLY GUSTY NORTHWESTERLY WINDS.
WINDS WILL DIMINISH INTO SATURDAY AS LOW PRESSURE EXITS AND HIGH
PRESSURE AROUND 30.2 INCHES BUILDS INTO THE CENTRAL GREAT PLAINS
AND MIDDLE MISSISSIPPI VALLEY. EXPECT LIGHT AND VARIABLE WINDS
SATURDAY NIGHT BEFORE GUSTY SOUTHWESTERLY WINDS DEVELOP AHEAD OF A
LOW PRESSURE SYSTEM TRACKING ACROSS FAR SOUTHERN CANADA SUNDAY
INTO MONDAY. GALES ARE POSSIBLE DURING THIS TIME FRAME, ESPECIALLY
IN THE NORTHERN HALF OF THE LAKE. LOW PRESSURE WILL DRAG A STRONG
COLD FRONT THROUGH THE LAKE ON MONDAY, SHIFTING WINDS TO
NORTHWESTERLY AND PRODUCING ADDITIONAL GALE POTENTIAL THROUGH
MONDAY NIGHT.
LMZ261-362-364-366-563-565-567-868-310915-
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-
858 PM CDT THU OCT 30 2025
SHEBOYGAN WI TO PENTWATER MI NORTH...
REST OF TONIGHT
NORTH WINDS 10 TO 15 KT INCREASING TO 10 TO
20 KT. WAVES 2 TO 4 FT.
FRIDAY
NORTH WINDS 10 TO 20 KT. SLIGHT CHANCE OF RAIN SHOWERS
IN THE AFTERNOON. WAVES 3 TO 5 FT.
FRIDAY NIGHT
NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FT.
SATURDAY
NORTH WINDS 10 TO 15 KT. CHANCE OF RAIN SHOWERS.
WAVES 2 TO 4 FT.
SATURDAY NIGHT
NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST.
CHANCE OF RAIN SHOWERS IN THE EVENING. WAVES 1 TO 3 FT.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KT INCREASING TO 30 KT IN THE
AFTERNOON. WAVES 1 TO 2 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO
8 FT.
SUNDAY NIGHT
SOUTHWEST GALES TO 40 KT. CHANCE OF SHOWERS.
WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT BUILDING TO 7 TO 10 FT
OCCASIONALLY TO 13 FT.
MONDAY
WEST WINDS TO 30 KT. CHANCE OF RAIN SHOWERS. WAVES 6 TO
9 FT OCCASIONALLY TO 12 FT.
TUESDAY
WEST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-310915-
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-
858 PM CDT THU OCT 30 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH...
REST OF TONIGHT
NORTH WINDS 10 TO 20 KT BECOMING NORTHWEST.
SLIGHT CHANCE OF RAIN SHOWERS THROUGH EARLY EVENING. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT.
FRIDAY
NORTHWEST WINDS 10 TO 20 KT. SLIGHT CHANCE OF RAIN
SHOWERS IN THE MORNING. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
FRIDAY NIGHT
NORTHWEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. CHANCE OF RAIN SHOWERS. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT SUBSIDING TO 2 TO 4 FT.
SATURDAY
NORTHWEST WINDS 10 TO 20 KT. RAIN SHOWERS LIKELY.
WAVES 2 TO 4 FT.
SATURDAY NIGHT
NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST 5 TO
10 KT. CHANCE OF RAIN SHOWERS IN THE EVENING. WAVES 2 TO 4 FT.
SUNDAY
WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST 15 TO 25 KT
IN THE AFTERNOON. WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT.
SUNDAY NIGHT
SOUTHWEST WINDS TO 30 KT. CHANCE OF SHOWERS.
WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT BUILDING TO 7 TO 10 FT
OCCASIONALLY TO 13 FT.
MONDAY
WEST WINDS TO 30 KT. WAVES 7 TO 10 FT OCCASIONALLY TO
13 FT.
TUESDAY
WEST WINDS 10 TO 20 KT. WAVES 4 TO 6 FT OCCASIONALLY
TO 8 FT SUBSIDING TO 3 TO 5 FT.
LMZ761-310915-
MAFOR 3104/
MICHIGAN NORTH 11810 15820 11810. A CHANCE OF SHOWERS FRIDAY
EVENING. WAVES 1 TO 3 FEET OVERNIGHT. WAVES 2 TO 4 FEET FRIDAY.
WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3 FEET FRIDAY EVENING.
MICHIGAN SOUTH 15720 11720 11710. A CHANCE OF SHOWERS FRIDAY
EVENING. WAVES 3 TO 6 FEET OVERNIGHT AND FRIDAY. WAVES 3 TO 5
FEET SUBSIDING TO 2 TO 4 FEET FRIDAY EVENING.
CRONCE
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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