643
FZUS63 KMKX 072040
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
240 PM CST WED JAN 7 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
A HIGH PRESSURE RIDGE AVERAGING 30.0 INCHES CONTINUES EASTWARD
FROM THE OHIO RIVER VALLEY AND EASTERN GREAT LAKES THIS EVENING,
ALLOWING A LIGHT SOUTH BREEZE TO OVERSPREAD LAKE MICHIGAN,
STRENGTHENING (GUSTS TO 20 KT) ON THURSDAY AS THE RIDGE BUILDS TO
30.2 INCHES AND A TROUGH OF LOW PRESSURE DEEPENS OVER THE GREAT
PLAINS.
A MORE ORGANIZED LOW PRESSURE SYSTEM EVOLVES OVER THE CENTRAL
GREAT PLAINS ON THURSDAY, TRACKING NORTHEASTWARDS AND STRENGTHENING
TO 29.3 INCHES AS IT CROSSES LAKE MICHIGAN LATE THURSDAY NIGHT.
GUSTY SOUTH TO SOUTHEASTERLY WINDS WILL OCCUR OVER THE SOUTHERN
HALF OF LAKE MICHIGAN THURSDAY EVENING AS THE LOW PRESSURE
APPROACHES, VEERING SOUTHWESTERLY LATE. SLOWER EAST WINDS EXPECTED
FOR THE NORTH HALF.
AS THIS LOW PRESSURE DEPARTS NORTHEASTWARD (PREDAWN FRIDAY
MORNING), IT SWINGS A COLD FRONT SOUTHWARD ACROSS THE LAKE, WITH
GUSTY NORTH TO NORTHWEST WINDS BEHIND IT, WHICH PERSIST THROUGH
EARLY FRIDAY AFTERNOON. BOTH OF THESE PERIODS OF GUSTY WINDS ARE
EXPECTED TO BE BELOW GALE FORCE.
WEAK HIGH PRESSURE CROSSES THE LAKE FRIDAY NIGHT WITH LIGHT AND
VARIABLE WINDS TURNING EAST. ANOTHER LOW PRESSURE SYSTEM TRACKING
NORTHEASTWARD FROM ARKANSAS/LOUISIANA WILL PASS SOUTH OF LAKE
MICHIGAN ON SATURDAY, AND THE WEST TO NORTHWEST WINDS BEHIND THIS
SYSTEM (SATURDAY NIGHT INTO SUNDAY) MAY REACH GALE FORCE OVER LAKE
MICHIGAN.
LMZ261-362-364-366-563-565-567-868-080430-
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-
240 PM CST WED JAN 7 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
TONIGHT
SOUTH WINDS 10 TO 20 KT. WAVES 3 TO 5 FT.
THURSDAY
SOUTH WINDS 10 TO 20 KT. SLIGHT CHANCE OF RAIN IN THE
AFTERNOON. WAVES 3 TO 5 FT.
THURSDAY NIGHT
SOUTHEAST WINDS 10 TO 20 KT INCREASING TO 30 KT
LATE IN THE EVENING, THEN BECOMING EAST AFTER MIDNIGHT BACKING TO
NORTHWEST LATE. RAIN. WAVES 3 TO 5 FT BUILDING TO 6 TO 9 FT
OCCASIONALLY TO 12 FT.
FRIDAY
NORTHWEST WINDS TO 30 KT BECOMING NORTH. CHANCE OF RAIN
IN THE MORNING. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT.
FRIDAY NIGHT
NORTH WINDS 10 TO 20 KT BECOMING EAST 10 TO
15 KT. WAVES 3 TO 5 FT SUBSIDING TO 1 TO 3 FT.
SATURDAY
EAST WINDS 10 TO 20 KT BECOMING NORTH 15 TO 25 KT.
SNOW LIKELY. WAVES 1 TO 3 FT BUILDING TO 4 TO 6 FT OCCASIONALLY
TO 8 FT.
SATURDAY NIGHT
NORTHWEST WINDS TO 30 KT INCREASING TO GALES TO
35 KT. SNOW LIKELY. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT.
SUNDAY
NORTH GALES TO 35 KT BECOMING NORTHWEST TO 30 KT. WAVES
8 TO 11 FT OCCASIONALLY TO 14 FT SUBSIDING TO 6 TO 9 FT
OCCASIONALLY TO 12 FT.
MONDAY
SOUTHWEST WINDS TO 30 KT. WAVES 4 TO 7 FT OCCASIONALLY
TO 9 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-080430-
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-
240 PM CST WED JAN 7 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TONIGHT
SOUTH WINDS 10 TO 20 KT. WAVES 3 TO 5 FT.
THURSDAY
SOUTH WINDS 10 TO 20 KT. RAIN IN THE AFTERNOON. WAVES
3 TO 5 FT.
THURSDAY NIGHT
SOUTHEAST WINDS TO 30 KT VEERING TO SOUTHWEST.
RAIN IN THE EVENING, THEN CHANCE OF RAIN OVERNIGHT. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT BUILDING TO 6 TO 9 FT OCCASIONALLY TO
12 FT.
FRIDAY
NORTHWEST WINDS 15 TO 25 KT BECOMING NORTH. CHANCE OF
RAIN IN THE MORNING. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT
SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
FRIDAY NIGHT
NORTHEAST WINDS 10 TO 15 KT BECOMING EAST. CHANCE
OF RAIN AND SNOW OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT
SUBSIDING TO 2 TO 4 FT.
SATURDAY
NORTHEAST WINDS 10 TO 20 KT BACKING TO WEST TO 30 KT
IN THE AFTERNOON. RAIN AND SNOW. WAVES 2 TO 4 FT BUILDING TO 4 TO
6 FT OCCASIONALLY TO 8 FT.
SATURDAY NIGHT
WEST WINDS TO 30 KT INCREASING TO GALES TO
35 KT. SNOW LIKELY. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT
BUILDING TO 8 TO 11 FT OCCASIONALLY TO 14 FT.
SUNDAY
NORTHWEST GALES TO 35 KT DIMINISHING TO 30 KT. CHANCE
OF SNOW. WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT.
MONDAY
SOUTHWEST WINDS TO 30 KT. WAVES 5 TO 8 FT OCCASIONALLY
TO 10 FT.
LMZ761-080430-
MAFOR 0723/
MICHIGAN NORTH 14420 11410 13420. A CHANCE OF RAIN THURSDAY
AFTERNOON. WAVES 1 TO 3 FEET BUILDING TO 2 TO 4 FEET TONIGHT.
WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET THURSDAY.
MICHIGAN SOUTH 11410 15420 11426. WAVES 1 TO 3 FEET BUILDING TO 2
TO 4 FEET TONIGHT. WAVES 2 TO 4 FEET BUILDING TO 3 TO 5 FEET
THURSDAY.
SHEPPARD
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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