829
FZUS63 KMKX 201339
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
839 AM CDT FRI MAR 20 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
SOUTH TO SOUTHWEST WINDS CONTINUE AS A LOW PRESSURE AROUND 29.7
INCHES MOVES SOUTHEAST THROUGH NORTHERN LOWER MICHIGAN. WINDS WILL
SHIFT TO NORTHWEST TO NORTH LATER THIS MORNING AS COLD FRONT
SHIFTS ACROSS THE LAKE BEHIND THE EXITING LOW. TONIGHT WINDS WILL
BECOME LIGHT AS HIGH PRESSURE AROUND 30.3 INCHES BUILDS IN FROM
ONTARIO.
LOW PRESSURE AROUND 29.5 INCHES DEVELOPS IN THE LEE OF THE
WYOMING ROCKIES SATURDAY MORNING, SHIFTING WINDS SOUTH. THE LOW
SHOULD MOVE SOUTHEASTWARD SATURDAY NIGHT, ALLOWING WINDS TO
INCREASE AND SHIFT TO THE NORTH AND NORTHEAST ACROSS THE NORTHERN
HALF OF THE LAKE.
THE LOW SHOULD MOVE ACROSS CENTRAL ILLINOIS INTO INDIANA SUNDAY,
AS IT DEEPENS TO AROUND 29.4 INCHES. THIS SHOULD LEAD TO NORTHERLY
WINDS BACKING TO NORTHWESTERLY SUNDAY INTO SUNDAY NIGHT ACROSS THE
LAKE. A FEW GALES ARE POSSIBLE DURING THIS TIMEFRAME. HIGH
PRESSURE AROUND 30.5 INCHES SHOULD THEN BRING DECREASING WINDS
FOR MONDAY.
LMZ261-362-364-366-563-565-567-868-202115-
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-
839 AM CDT FRI MAR 20 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
REST OF TODAY
NORTH WINDS 10 TO 20 KT. PATCHY FOG THROUGH MID
MORNING. WAVES 2 TO 4 FT.
TONIGHT
NORTH WINDS 10 TO 20 KT DIMINISHING TO 5 TO 10 KT LATE
IN THE EVENING, THEN BECOMING NORTH 5 TO 10 KT AFTER MIDNIGHT
BECOMING NORTHEAST LATE. WAVES 1 TO 3 FT SUBSIDING TO 1 TO 2 FT.
SATURDAY
SOUTHEAST WINDS 5 TO 10 KT BECOMING SOUTH 10 TO
20 KT. CHANCE OF SNOW IN THE MORNING, THEN CHANCE OF RAIN AND
SNOW IN THE AFTERNOON. WAVES 1 TO 2 FT BUILDING TO 2 TO 4 FT.
SATURDAY NIGHT
SOUTH WINDS 10 TO 20 KT VEERING TO NORTH.
CHANCE OF RAIN IN THE EVENING, THEN RAIN WITH LIGHT FREEZING RAIN
LIKELY OVERNIGHT. WAVES 2 TO 4 FT.
SUNDAY
NORTH WINDS 15 TO 25 KT INCREASING TO 30 KT. CHANCE OF
RAIN AND SNOW IN THE MORNING. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
SUNDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT.
WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT SUBSIDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
MONDAY
NORTH WINDS 10 TO 20 KT BECOMING NORTHWEST. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
TUESDAY
SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-202115-
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-
839 AM CDT FRI MAR 20 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
REST OF TODAY
SOUTHWEST WINDS 15 TO 25 KT VEERING TO NORTH
10 TO 20 KT. WAVES 3 TO 5 FT SUBSIDING TO 2 TO 4 FT.
TONIGHT
NORTH WINDS 10 TO 20 KT BECOMING NORTHEAST 10 TO 15 KT
AFTER MIDNIGHT, THEN DIMINISHING TO 5 TO 10 KT LATE. WAVES 2 TO
4 FT SUBSIDING TO 1 TO 2 FT.
SATURDAY
EAST WINDS 5 TO 10 KT BECOMING SOUTHEAST 10 TO 15 KT
LATE IN THE MORNING, THEN BECOMING SOUTH 10 TO 20 KT IN THE
AFTERNOON. WAVES 1 TO 2 FT BUILDING TO 2 TO 4 FT.
SATURDAY NIGHT
SOUTH WINDS 10 TO 20 KT BECOMING WEST. WAVES
3 TO 5 FT.
SUNDAY
NORTH WINDS 15 TO 25 KT INCREASING TO 30 KT. CHANCE OF
RAIN. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO 7 TO 10 FT
OCCASIONALLY TO 13 FT.
SUNDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT SUBSIDING TO 6 TO 9 FT
OCCASIONALLY TO 12 FT.
MONDAY
NORTH WINDS 15 TO 25 KT DIMINISHING TO 10 TO 20 KT.
WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
TUESDAY
SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST 10 TO
20 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
LMZ761-202115-
MAFOR 2016/
MICHIGAN NORTH 11710 12820 11810 11800 11100 11200 11300. WAVES 2
TO 4 FEET SUBSIDING TO 1 TO 3 FEET THIS AFTERNOON. WAVES 2 FEET
OR LESS TONIGHT AND SATURDAY MORNING. WAVE HEIGHTS ARE FOR ICE
FREE AREAS.
MICHIGAN SOUTH 11720 13820 11110 11100 11200 11310. WAVES 2 TO 4
FEET THIS AFTERNOON. WAVES 1 TO 3 FEET TONIGHT. WAVES 1 FOOT OR
LESS SATURDAY MORNING.
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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