669
FZUS63 KMKX 052047
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
347 PM CDT SUN APR 5 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
WINDS WILL TAPER THROUGH TONIGHT AS 30.4 INCH HIGH PRESSURE
BUILDS INTO THE GREAT PLAINS. NORTHWEST WINDS WILL INCREASE ONCE
MORE DURING THE DAY MONDAY AS A SMALL AREA OF 30.0 INCH LOW
PRESSURE DEVELOPS OVER LAKE HURON. A FEW GALE FORCE GUSTS ARE
POSSIBLE OVER THE NORTHERN HALF OF THE OPEN WATERS DURING THE
AFTERNOON HOURS, BUT ARE EXPECTED TO BE ISOLATED AND BRIEF ENOUGH
TO PRECLUDE THE NEED FOR ANY HEADLINES. TRENDS WILL CONTINUE TO BE
MONITORED. WINDS WILL DECREASE MONDAY NIGHT INTO TUESDAY AS 30.5
INCH HIGH PRESSURE MOVES OVER AND EAST OF THE OPEN WATERS. AREAS
OF MODERATE FREEZING SPRAY ARE POSSIBLE OVER THE NORTHERN HALF OF
THE LAKE MONDAY AFTERNOON AND EVENING.
29.6 INCH LOW PRESSURE WILL FORM OVER THE NORTHERN GREAT PLAINS
AND APPROACH LAKE MICHIGAN TUESDAY NIGHT INTO WEDNESDAY,
RESULTING IN INCREASING SOUTHERLY WINDS ACROSS THE WATERS. WINDS
WILL REMAIN GUSTY INTO WEDNESDAY NIGHT AS THE LOW PASSES NEAR OR
JUST NORTH OF LAKE SUPERIOR. GALE FORCE GUSTS WILL BE POSSIBLE
WITH THIS SYSTEM. WINDS WILL TAPER DURING THE DAY THURSDAY WHEN
30.4 INCH HIGH PRESSURE IS FORECAST TO MOVE FROM THE NORTHERN
GREAT PLAINS TOWARD LAKE SUPERIOR. SHOWERS AND A FEW THUNDERSTORMS
ARE EXPECTED WEDNESDAY INTO THURSDAY, WITH SEVERE WEATHER
POTENTIAL APPEARING LOW AT THIS TIME.
LMZ261-362-364-366-563-565-567-868-060315-
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-
347 PM CDT SUN APR 5 2026
SHEBOYGAN WI TO PENTWATER MI NORTH...
TONIGHT
WEST WINDS 10 TO 20 KT BECOMING NORTHWEST. CHANCE OF
RAIN SHOWERS THIS EVENING. WAVES 2 TO 4 FT SUBSIDING TO 1 TO
3 FT.
MONDAY
NORTHWEST WINDS 10 TO 20 KT BECOMING NORTH TO 30 KT.
SLIGHT CHANCE OF SNOW SHOWERS IN THE MORNING, THEN CHANCE OF SNOW
SHOWERS IN THE AFTERNOON. WAVES 3 TO 5 FT BUILDING TO 4 TO 7 FT
OCCASIONALLY TO 9 FT.
MONDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT.
FREEZING SPRAY IN THE EVENING. CHANCE OF SNOW SHOWERS IN THE
EVENING. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT.
TUESDAY
NORTHWEST WINDS 10 TO 15 KT BACKING TO SOUTHWEST 10 TO
20 KT. WAVES 3 TO 5 FT SUBSIDING TO 1 TO 3 FT.
TUESDAY NIGHT
SOUTH WINDS 10 TO 20 KT INCREASING TO 15 TO
25 KT. WAVES 1 TO 3 FT BUILDING TO 4 TO 6 FT OCCASIONALLY TO
8 FT.
WEDNESDAY
SOUTH WINDS TO 30 KT INCREASING TO GALES TO 35 KT.
CHANCE OF RAIN SHOWERS IN THE MORNING. WAVES 8 TO 11 FT
OCCASIONALLY TO 14 FT BUILDING TO 10 TO 14 FT OCCASIONALLY TO
18 FT.
WEDNESDAY NIGHT
SOUTH GALES TO 40 KT. RAIN SHOWERS. WAVES
12 TO 16 FT OCCASIONALLY TO 21 FT.
THURSDAY
SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
CHANCE OF RAIN SHOWERS. WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT
SUBSIDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
FRIDAY
NORTHWEST WINDS 10 TO 15 KT BECOMING NORTH. WAVES 2 TO
4 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-060315-
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-
347 PM CDT SUN APR 5 2026
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TONIGHT
SOUTHWEST WINDS 10 TO 15 KT BECOMING WEST 10 TO 20 KT
LATE THIS EVENING, THEN INCREASING TO 15 TO 25 KT AFTER MIDNIGHT
BECOMING NORTHWEST LATE. CHANCE OF RAIN SHOWERS. WAVES 3 TO 5 FT
SUBSIDING TO 2 TO 4 FT.
MONDAY
NORTHWEST WINDS 10 TO 20 KT INCREASING TO 15 TO 25 KT.
WAVES 2 TO 4 FT BUILDING TO 4 TO 7 FT OCCASIONALLY TO 9 FT.
MONDAY NIGHT
NORTH WINDS TO 30 KT DIMINISHING TO 10 TO 20 KT.
CHANCE OF SNOW SHOWERS IN THE EVENING. WAVES 6 TO 9 FT
OCCASIONALLY TO 12 FT.
TUESDAY
NORTH WINDS 10 TO 15 KT BECOMING NORTHEAST. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 3 TO 5 FT.
TUESDAY NIGHT
SOUTHEAST WINDS 10 TO 15 KT INCREASING TO 15 TO
25 KT OVERNIGHT. WAVES 1 TO 3 FT BUILDING TO 4 TO 6 FT
OCCASIONALLY TO 8 FT.
WEDNESDAY
SOUTH WINDS TO 30 KT INCREASING TO GALES TO 35 KT.
WAVES 8 TO 11 FT OCCASIONALLY TO 14 FT BUILDING TO 10 TO 14 FT
OCCASIONALLY TO 18 FT.
WEDNESDAY NIGHT
SOUTH GALES TO 40 KT. CHANCE OF RAIN SHOWERS.
WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT.
THURSDAY
SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
CHANCE OF RAIN SHOWERS. WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT
SUBSIDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
FRIDAY
NORTH WINDS 10 TO 20 KT DIMINISHING TO 10 TO 15 KT.
CHANCE OF RAIN SHOWERS. WAVES 2 TO 4 FT.
LMZ761-060315-
MAFOR 0522/
MICHIGAN NORTH 11620 11720 11710 13720 11730 11830. A CHANCE OF
RAIN SHOWERS THIS EVENING. WAVES 2 TO 4 FEET SUBSIDING TO 1 TO 3
FEET TONIGHT. WAVES 1 TO 3 FEET BUILDING TO 3 TO 6 FEET MONDAY.
MICHIGAN SOUTH 11620 11610 11620 11730 12720 12730. A CHANCE OF
RAIN SHOWERS TONIGHT. WAVES 3 TO 5 FEET SUBSIDING TO 1 TO 3 FEET
TONIGHT. WAVES 1 TO 3 FEET BUILDING TO 3 TO 6 FEET MONDAY.
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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