774
FZUS63 KMKX 091930
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
230 PM CDT THU APR 9 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 AROUND 29.6 INCHES HAS PUSHED EAST OF ST JAMES BAY
THIS AFTERNOON WITH HIGH PRESSURE OF 30. INCHES BUILDING IN OVER
THE LAKE. RAIN AND PERHAPS A FEW RUMBLES OF THUNDER POSSIBLE
OVER THE SOUTH HALF OF THE LAKE TONIGHT AS A WARM FRONT LIFTS
INTO THE SOUTHERN HALF OF THE LAKE WITH A WEAK LOW PRESSURE
REGION DEVELOPING SOUTH OF THE LAKE. WINDS WILL REMAIN MORE
NORTHERLY ACROSS THE LAKE BUT FAIRLY LIGHT. HIGH PRESSURE WILL
PUSH THIS SYSTEM BACK SOUTH AND BUILD IN OVER THE EASTERN GREAT
LAKES REGION TO AROUND 30.4 INCHES. OVERALL LIGHT AND VARIABLE
WINDS WILL CONTINUE THROUGH MUCH OF SATURDAY BEFORE BREEZY
SOUTHERLY WINDS RETURN LATE WEEKEND THROUGH AS LATE AS MID NEXT
WEEK.
SOUTHERLY GALES ARE POSSIBLE OVER THE NORTH HALF SUNDAY INTO
MONDAY MORNING WITH PERIODS EARLY TO MID NEXT WEEK FEATURING
CHANCES FOR STORMS, POSSIBLY SOME STORMS BEING STRONG.
LMZ261-362-364-366-563-565-567-868-100300-
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-
230 PM CDT THU APR 9 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
TONIGHT
SOUTH WINDS 10 TO 15 KT BACKING TO NORTHEAST. CHANCE
OF RAIN AND SNOW SHOWERS OVERNIGHT. WAVES 1 TO 3 FT SUBSIDING TO
1 TO 2 FT.
FRIDAY
NORTH WINDS 10 TO 15 KT BECOMING NORTHWEST 10 TO 20 KT.
WAVES 1 TO 3 FT.
FRIDAY NIGHT
NORTH WINDS 10 TO 15 KT BACKING TO SOUTHWEST.
WAVES 1 TO 2 FT SUBSIDING TO 1 FT OR LESS.
SATURDAY
SOUTH WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 2 FT.
SATURDAY NIGHT
SOUTHEAST WINDS 10 TO 15 KT INCREASING TO 15 TO
25 KT OVERNIGHT. CHANCE OF RAIN SHOWERS IN THE EVENING, THEN RAIN
SHOWERS OVERNIGHT. WAVES 1 TO 3 FT BUILDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
SUNDAY
SOUTH WINDS TO 30 KT INCREASING TO GALES TO 35 KT. RAIN
SHOWERS IN THE MORNING, THEN RAIN SHOWERS LIKELY IN THE
AFTERNOON. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT BUILDING TO 8 TO
11 FT OCCASIONALLY TO 14 FT.
SUNDAY NIGHT
SOUTHWEST GALES TO 40 KT. RAIN SHOWERS LIKELY.
WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT.
MONDAY
SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
CHANCE OF RAIN SHOWERS. WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT
SUBSIDING TO 6 TO 9 FT OCCASIONALLY TO 12 FT.
TUESDAY
NORTHEAST WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT.
RAIN SHOWERS LIKELY. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-100300-
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-
230 PM CDT THU APR 9 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TONIGHT
EAST WINDS 10 TO 15 KT BECOMING NORTH 10 TO 20 KT.
CHANCE OF RAIN SHOWERS AND SLIGHT CHANCE OF THUNDERSTORMS THIS
EVENING, THEN RAIN SHOWERS OVERNIGHT. WAVES 1 TO 3 FT.
FRIDAY
NORTH WINDS 10 TO 20 KT. CHANCE OF RAIN SHOWERS IN THE
MORNING. WAVES 2 TO 4 FT.
FRIDAY NIGHT
NORTHEAST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT LATE IN THE EVENING, THEN BECOMING NORTHEAST 10 TO 15 KT
AFTER MIDNIGHT BECOMING EAST LATE. WAVES 2 TO 4 FT SUBSIDING TO
1 TO 2 FT.
SATURDAY
SOUTHEAST WINDS 5 TO 10 KT INCREASING TO 10 TO 15 KT.
WAVES 1 TO 2 FT.
SATURDAY NIGHT
SOUTHEAST WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. CHANCE OF RAIN SHOWERS. WAVES 1 TO 3 FT BUILDING TO 4 TO
7 FT OCCASIONALLY TO 9 FT.
SUNDAY
SOUTH WINDS TO 30 KT. CHANCE OF RAIN SHOWERS IN THE
MORNING, THEN CHANCE OF RAIN SHOWERS AND THUNDERSTORMS IN THE
AFTERNOON. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT BUILDING TO 7 TO
10 FT OCCASIONALLY TO 13 FT.
SUNDAY NIGHT
SOUTHWEST GALES TO 35 KT. SHOWERS LIKELY. WAVES
8 TO 12 FT OCCASIONALLY TO 16 FT.
MONDAY
SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
CHANCE OF SHOWERS. WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT
SUBSIDING TO 6 TO 9 FT OCCASIONALLY TO 12 FT.
TUESDAY
SOUTHWEST WINDS TO 30 KT BECOMING SOUTH 10 TO 20 KT.
CHANCE OF RAIN SHOWERS. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT.
LMZ761-100300-
MAFOR 0922/
MICHIGAN NORTH 11420 11300 11210 12110 11810 11820 11720. A
CHANCE OF RAIN AND SNOW SHOWERS OVERNIGHT. WAVES 1 TO 3 FEET
SUBSIDING TO 1 FOOT OR LESS TONIGHT. WAVES 2 FEET OR LESS FRIDAY.
MICHIGAN SOUTH 11210 11116 12126 11826 13820. WAVES 2 FEET OR
LESS TONIGHT. WAVES 1 TO 3 FEET FRIDAY.
KUROSKI
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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