523
FZUS63 KMKX 042031
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
231 PM CST SUN JAN 4 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
30.2 INCH HIGH PRESSURE IS MOVING EAST OF LAKE MICHIGAN THIS
AFTERNOON, RESULTING IN LIGHT SOUTHERLY WINDS. CURRENTLY OVER THE
NORTHERN GREAT PLAINS, 29.6 INCH LOW PRESSURE WILL MOVE INTO THE
NORTHERN MISSISSIPPI RIVER VALLEY THIS EVENING, RESULTING IN
INCREASING SOUTHERLY WINDS ACROSS THE WATERS. GUSTS BETWEEN 25-30
KNOTS WILL BE POSSIBLE THROUGH DAYBREAK MONDAY. WINDS WILL VEER
SOUTHWESTERLY AND EVENTUALLY WESTERLY MONDAY MORNING AS THE
AFOREMENTIONED AREA OF LOW PRESSURE CROSSES THE WATERS, GRADUALLY
WEAKENING IN THE PROCESS. RAIN-SNOW MIX AND FREEZING DRIZZLE ARE
FORECAST AHEAD OF THE APPROACHING LOW TONIGHT. WINDS WILL BECOME
LIGHT AND VARIABLE MONDAY AFTERNOON AS 29.9 INCH HIGH PRESSURE
MOVES ACROSS LAKE MICHIGAN.
SOUTHERLY WINDS WILL BECOME ESTABLISHED MONDAY NIGHT AHEAD OF A NEW
AREA OF 29.6 INCH LOW PRESSURE FORMING IN THE NORTHERN GREAT
PLAINS. THE LOW WILL APPROACH AND ULTIMATELY CROSS LAKE MICHIGAN
TUESDAY MORNING, RESULTING IN A WEST-NORTHWEST WIND SHIFT BY THE
AFTERNOON HOURS. GALES ARE NOT ANTICIPATED DURING THE LOW'S
PASSAGE. ADDITIONAL RAIN AND RAIN-SNOW MIX ARE FORECAST TUESDAY IN
AFFILIATION WITH THE LOW. WEST TO SOUTHWEST WINDS WILL PREVAIL
THROUGH WEDNESDAY AFTERNOON, TURNING SOUTHERLY WEDNESDAY NIGHT
INTO THURSDAY. A COLD FRONT WILL CROSS THE WATERS THURSDAY NIGHT,
BRINGING NORTH-NORTHEAST WINDS BY FRIDAY MORNING. RAIN AND SNOW
WILL ACCOMPANY THE PASSING COLD FRONT THURSDAY NIGHT THROUGH
FRIDAY.
LMZ261-362-364-366-563-565-567-868-050430-
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-
231 PM CST SUN JAN 4 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
TONIGHT
SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST. SNOW WITH
A CHANCE OF LIGHT FREEZING DRIZZLE THIS EVENING, THEN CHANCE OF
SNOW, RAIN AND LIGHT FREEZING DRIZZLE OVERNIGHT. WAVES 3 TO 5 FT
BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
MONDAY
WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST 5 TO 10 KT.
SLIGHT CHANCE OF LIGHT FREEZING DRIZZLE IN THE MORNING. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
MONDAY NIGHT
SOUTH WINDS 5 TO 10 KT. WAVES 1 TO 3 FT.
TUESDAY
SOUTHEAST WINDS 10 TO 15 KT BECOMING SOUTH. RAIN
LIKELY WITH A CHANCE OF LIGHT FREEZING RAIN IN THE MORNING, THEN
CHANCE OF RAIN AND SNOW IN THE AFTERNOON. WAVES 1 TO 2 FT.
TUESDAY NIGHT
WEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
WEDNESDAY
WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST 10 TO
20 KT. WAVES 1 TO 3 FT.
WEDNESDAY NIGHT
SOUTH WINDS 10 TO 15 KT. WAVES 2 TO 4 FT.
THURSDAY
SOUTH WINDS 10 TO 20 KT BECOMING SOUTHWEST. WAVES
2 TO 4 FT.
FRIDAY
NORTH WINDS 10 TO 20 KT BECOMING NORTHEAST. CHANCE OF
RAIN. WAVES 2 TO 4 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-050430-
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-
231 PM CST SUN JAN 4 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TONIGHT
SOUTH WINDS 15 TO 25 KT BECOMING SOUTHWEST TO 30 KT.
CHANCE OF RAIN, SNOW AND SLIGHT CHANCE OF LIGHT FREEZING RAIN
THIS EVENING, THEN SLIGHT CHANCE OF LIGHT FREEZING RAIN
OVERNIGHT. WAVES 3 TO 5 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO
9 FT.
MONDAY
SOUTHWEST WINDS 10 TO 20 KT DIMINISHING TO 5 TO 10 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 1 TO 3 FT.
MONDAY NIGHT
SOUTH WINDS 5 TO 10 KT BECOMING SOUTHEAST 10 TO
15 KT. WAVES 1 TO 3 FT.
TUESDAY
SOUTH WINDS 10 TO 15 KT BECOMING SOUTHWEST. RAIN
LIKELY IN THE MORNING, THEN CHANCE OF RAIN IN THE AFTERNOON.
WAVES 1 TO 3 FT.
TUESDAY NIGHT
WEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
WEDNESDAY
WEST WINDS 10 TO 15 KT BECOMING SOUTHWEST. WAVES
1 TO 3 FT.
WEDNESDAY NIGHT
SOUTH WINDS 10 TO 15 KT. WAVES 2 TO 4 FT.
THURSDAY
SOUTH WINDS 10 TO 20 KT BECOMING WEST. CHANCE OF
RAIN. WAVES 2 TO 4 FT.
FRIDAY
NORTHEAST WINDS 10 TO 20 KT. CHANCE OF RAIN. WAVES 4 TO
6 FT OCCASIONALLY TO 8 FT.
LMZ761-050430-
MAFOR 0423/
MICHIGAN NORTH 12437 11447 11537 11520 11710 11700 11500. A
CHANCE OF LIGHT FREEZING DRIZZLE THIS EVENING. A CHANCE OF RAIN
AND LIGHT FREEZING DRIZZLE OVERNIGHT. WAVES 2 FEET OR LESS
BUILDING TO 4 TO 7 FEET TONIGHT. WAVES 3 TO 6 FEET SUBSIDING TO 1
TO 3 FEET MONDAY.
MICHIGAN SOUTH 12430 11440 11540 11530 11620 11610 11510. A
CHANCE OF RAIN AND SNOW THIS EVENING. WAVES 1 TO 2 FEET BUILDING
TO 4 TO 7 FEET TONIGHT. WAVES 3 TO 6 FEET SUBSIDING TO 1 TO 3
FEET MONDAY.
QUIGLEY
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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