458
FZUS63 KMKX 190805
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
305 AM CDT THU MAR 19 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 29.9 INCHES WILL ADVANCE TOWARD SOUTHERN
HUDSON BAY THROUGH DAYBREAK AS HIGH PRESSURE AROUND 30.1 INCHES
BUILDS INTO WI FROM THE NORTHERN GREAT PLAINS. THUS ANTICIPATE
THAT THE CURRENT SOUTHWEST WINDS WILL TREND LIGHT AND VARIABLE
THROUGH THIS MORNING. ANOTHER LOW PRESSURE AROUND 29.7 INCHES WILL
DEVELOP IN THE CANADIAN GREAT PLAINS THIS AFTERNOON, ALLOWING
WINDS TO TURN EAST-SOUTHEASTERLY ACROSS LAKE MICHIGAN. WINDS WILL
INCREASE AND VEER SOUTH TO SOUTHWESTERLY ACROSS THE WATERS
TONIGHT AS THE LOW PRESSURE PROGRESSES OVER OR JUST NORTH OF THE
NORTHERN HALF OF LAKE MICHIGAN. SOME RAIN OR SNOW IS POSSIBLE OVER
NORTHERN LAKE MICHIGAN DURING THE LOW'S PASSAGE, WITH WIND GUSTS
EXPECTED TO REMAIN BELOW GALE THRESHOLDS. WINDS WILL THEN TURN
WEST-NORTHWESTERLY FRIDAY AS A COLD FRONT MOVES ACROSS THE
WATERS.
WINDS WILL BECOME LIGHT FRIDAY NIGHT THROUGH SATURDAY MORNING AS
HIGH PRESSURE AROUND 30.0 INCHES MOVES ACROSS LAKE MICHIGAN.
INCREASING SOUTHERLY WINDS ARE EXPECTED SATURDAY AFTERNOON AS A
COLD FRONT APPROACHES FROM THE NORTH. THE FRONT IS EXPECTED TO
CROSS LAKE MICHIGAN SATURDAY NIGHT INTO SUNDAY MORNING, BRINGING
GUSTY NORTHERLY WINDS INTO MONDAY MORNING. RAIN AND SNOW SHOWERS
WILL ACCOMPANY THE PASSING COLD FRONT. WIDESPREAD GALES ARE NOT
ANTICIPATED AT THIS TIME, THOUGH TRENDS WILL BE MONITORED OVER
COMING FORECASTS. WINDS WILL DECREASE MONDAY NIGHT, ULTIMATELY
TURNING SOUTHERLY AND INCREASING ONCE AGAIN DURING THE DAY ON
TUESDAY.
LMZ261-362-364-366-563-565-567-868-191530-
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-
305 AM CDT THU MAR 19 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
TODAY
NORTHWEST WINDS 5 TO 10 KT BACKING TO SOUTHEAST. WAVES
1 TO 3 FT SUBSIDING TO 1 TO 2 FT.
TONIGHT
SOUTHEAST WINDS 5 TO 10 KT BECOMING SOUTH 10 TO 15 KT
LATE IN THE EVENING, THEN INCREASING TO 10 TO 20 KT AFTER
MIDNIGHT BECOMING SOUTH 10 TO 20 KT LATE. SLIGHT CHANCE OF RAIN
WITH A CHANCE OF LIGHT FREEZING RAIN OVERNIGHT. WAVES 1 TO 2 FT
BUILDING TO 1 TO 3 FT.
FRIDAY
SOUTHWEST WINDS 10 TO 20 KT BECOMING NORTHWEST 10 TO
15 KT. WAVES 2 TO 4 FT.
FRIDAY NIGHT
NORTHWEST WINDS 5 TO 10 KT BECOMING WEST. WAVES
1 TO 2 FT.
SATURDAY
SOUTHWEST WINDS 10 TO 15 KT BECOMING SOUTH. WAVES
1 TO 3 FT.
SATURDAY NIGHT
EAST WINDS 10 TO 15 KT BECOMING NORTHEAST 10 TO
20 KT. CHANCE OF RAIN AND SNOW. WAVES 2 TO 4 FT BUILDING TO 3 TO
5 FT.
SUNDAY
NORTHEAST WINDS 15 TO 25 KT INCREASING TO 30 KT. CHANCE
OF SNOW. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT.
MONDAY
NORTH WINDS 15 TO 25 KT BECOMING NORTHWEST 10 TO 20 KT.
WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT SUBSIDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-191530-
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-
305 AM CDT THU MAR 19 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TODAY
NORTHWEST WINDS 5 TO 10 KT VEERING TO EAST. CHANCE OF
RAIN THIS MORNING. WAVES 1 TO 2 FT SUBSIDING TO NEARLY CALM.
TONIGHT
EAST WINDS 5 TO 10 KT BECOMING SOUTHEAST LATE IN THE
EVENING, THEN BECOMING SOUTH 10 TO 15 KT AFTER MIDNIGHT
INCREASING TO 10 TO 20 KT LATE. WAVES 1 TO 3 FT.
FRIDAY
SOUTHWEST WINDS 10 TO 20 KT VEERING TO NORTHWEST 10 TO
15 KT. WAVES 2 TO 4 FT.
FRIDAY NIGHT
NORTH WINDS 5 TO 10 KT. WAVES 1 TO 3 FT.
SATURDAY
SOUTH WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
SATURDAY NIGHT
SOUTH WINDS 10 TO 15 KT BECOMING WEST 10 TO
20 KT. WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT.
SUNDAY
NORTH WINDS 15 TO 25 KT INCREASING TO 30 KT. CHANCE OF
RAIN. WAVES 5 TO 8 FT OCCASIONALLY TO 10 FT BUILDING TO 7 TO
10 FT OCCASIONALLY TO 13 FT.
MONDAY
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT. WAVES
8 TO 11 FT OCCASIONALLY TO 14 FT SUBSIDING TO 5 TO 8 FT
OCCASIONALLY TO 10 FT.
LMZ761-191530-
MAFOR 1910/
MICHIGAN NORTH 11710 11800 11100 11200 11300 12410 11420. A
CHANCE OF LIGHT FREEZING RAIN AND SNOW OVERNIGHT. WAVES 1 TO 3
FEET. WAVE HEIGHTS ARE FOR ICE FREE AREAS.
MICHIGAN SOUTH 11600 11100 11300 12200 11300 12410. A CHANCE OF
RAIN THIS MORNING. WAVES 2 FEET OR LESS.
WAGNER
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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