983
FZUS63 KMKX 211953
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
253 PM CDT SAT MAR 21 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 29.5 INCHES HAS DEVELOPED ACROSS THE NORTH
CENTRAL US TODAY AND WILL CONTINUE PUSHING EAST ACROSS THE LAKE
TONIGHT. AS THIS LOW PASSES SOUTH OF THE LAKE WINDS WILL SHIFT
TO THE NORTH AND NORTHEAST AND BECOME GUSTY LATER TONIGHT INTO
SUNDAY MORNING. A FEW NORTHERLY GALES ARE POSSIBLE SUNDAY,
MAINLY OVER SOUTHERN PORTIONS OF THE LAKE. HIGH PRESSURE AROUND
30.4 INCHES SHOULD THEN BRING DECREASING WINDS FOR MONDAY
THROUGH MONDAY NIGHT. INTO TUESDAY WINDS MAY PICK UP A BIT FROM
THE SOUTH AS THE HIGH EXITS AND WEAK FRONT PASSES OVER THE
REGION. WINDS OVER THE LAKE WILL REMAIN LARGELY FROM THE SOUTH
THROUGH WEDNESDAY AS BROAD LOW PRESSURE APPROACHES FROM THE
WEST. CHANCES FOR PRECIPITATION ON TUESDAY AND AGAIN ON
WEDNESDAY THOUGH PRIMARILY FOR NORTHERN PARTS OF THE LAKE.
LMZ261-362-364-366-563-565-567-868-220315-
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-
253 PM CDT SAT MAR 21 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
TONIGHT
SOUTH WINDS 15 TO 25 KT VEERING TO NORTHWEST 10 TO
15 KT LATE THIS EVENING, THEN BECOMING NORTH 10 TO 20 KT AFTER
MIDNIGHT INCREASING TO 15 TO 25 KT LATE. CHANCE OF RAIN
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO
4 FT.
SUNDAY
NORTH WINDS TO 30 KT. SLIGHT CHANCE OF RAIN IN THE
MORNING. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT BUILDING TO 6 TO
9 FT OCCASIONALLY TO 12 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 6 FT
OCCASIONALLY TO 8 FT.
MONDAY
NORTH WINDS 10 TO 20 KT BECOMING NORTHWEST 10 TO 15 KT.
WAVES 3 TO 5 FT SUBSIDING TO 1 TO 3 FT.
MONDAY NIGHT
SOUTH WINDS 10 TO 15 KT INCREASING TO 15 TO 25 KT
OVERNIGHT. WAVES 1 TO 2 FT BUILDING TO 3 TO 5 FT.
TUESDAY
SOUTHWEST WINDS TO 30 KT. WAVES 3 TO 5 FT.
TUESDAY NIGHT
SOUTH WINDS 10 TO 20 KT BACKING TO NORTHEAST
15 TO 25 KT. WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT OCCASIONALLY
TO 9 FT.
WEDNESDAY
EAST WINDS 15 TO 25 KT BECOMING SOUTHEAST 10 TO
20 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT.
THURSDAY
WEST WINDS 15 TO 25 KT BECOMING NORTHWEST. CHANCE OF
RAIN AND SNOW. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-220315-
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-
253 PM CDT SAT MAR 21 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TONIGHT
SOUTHWEST WINDS 15 TO 25 KT VEERING TO NORTH 10 TO
20 KT. WAVES 3 TO 5 FT SUBSIDING TO 2 TO 4 FT.
SUNDAY
NORTH WINDS TO 30 KT. A FEW GUSTS TO GALE FORCE
POSSIBLE. SLIGHT CHANCE OF RAIN. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT BUILDING TO 8 TO 11 FT OCCASIONALLY TO 14 FT.
SUNDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT.
WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT SUBSIDING TO 7 TO 10 FT
OCCASIONALLY TO 13 FT.
MONDAY
NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5 FT.
MONDAY NIGHT
EAST WINDS 10 TO 15 KT VEERING TO SOUTH 10 TO
20 KT. WAVES 1 TO 3 FT.
TUESDAY
SOUTH WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
TUESDAY NIGHT
SOUTHEAST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT
BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
WEDNESDAY
SOUTHEAST WINDS 15 TO 25 KT. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
THURSDAY
WEST WINDS 15 TO 25 KT VEERING TO NORTH 10 TO 20 KT.
CHANCE OF RAIN. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT.
LMZ761-220315-
MAFOR 2122/
MICHIGAN NORTH 11440 11720 11810 11820 11830 13840. A CHANCE OF
RAIN OVERNIGHT. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET
TONIGHT. WAVES 3 TO 5 FEET BUILDING TO 5 TO 8 FEET SUNDAY. WAVE
HEIGHTS ARE FOR ICE FREE AREAS.
MICHIGAN SOUTH 11540 11530 11620 11820 11830 12840 11850. WAVES 3
TO 5 FEET SUBSIDING TO 1 TO 3 FEET TONIGHT. WAVES 3 TO 5 FEET
BUILDING TO 6 TO 10 FEET SUNDAY.
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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