955
FZUS63 KMKX 220312
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
912 PM CST TUE JAN 21 2025
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
ARCTIC HIGH PRESSURE AROUND 30.7 INCHES OVER THE MIDDLE MISSISSIPPI
VALLEY WILL CONTINUE TO SINK SOUTHEASTWARD AS LOW PRESSURE AROUND
29.7 INCHES PROGRESSES FROM SOUTHERN MANITOBA INTO THE NORTHERN
GREAT LAKES INTO WEDNESDAY. EXPECT WINDS TO SHIFT SOUTHWESTERLY
AND BECOME GUSTY INTO WEDNESDAY MORNING AS LOW PRESSURE
APPROACHES. BRISK SOUTHWESTERLY WINDS WILL COMBINE WITH ELEVATED
WAVE HEIGHTS AND FRIGID AIR TEMPERATURES TO SUPPORT HEAVY FREEZING
SPRAY. HEAVY FREEZING SPRAY WARNINGS ARE IN EFFECT ACROSS THE OPEN
WATERS THROUGHOUT TONIGHT INTO WEDNESDAY AFTERNOON. IN ADDITION,
GALE WARNINGS ARE IN EFFECT STARTING EARLY WEDNESDAY MORNING INTO
WEDNESDAY AFTERNOON AS SOUTHWESTERLY GUSTS CONTINUE. WINDS SHIFT
NORTHWESTERLY AND DIMINISH WEDNESDAY NIGHT BEHIND A COLD FRONT.
LMZ261-362-364-366-563-565-567-868-221015-
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-
912 PM CST TUE JAN 21 2025
SHEBOYGAN WI TO PENTWATER MI NORTH...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH WEDNESDAY
AFTERNOON...
...GALE WARNING IN EFFECT FROM 4 AM CST WEDNESDAY THROUGH
WEDNESDAY AFTERNOON...
REST OF TONIGHT
SOUTHWEST WINDS TO 30 KT INCREASING TO GALES
TO 35 KT. HEAVY FREEZING SPRAY. CHANCE OF SNOW SHOWERS. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO 8 TO 12 FT
OCCASIONALLY TO 16 FT.
WEDNESDAY
SOUTHWEST GALES TO 35 KT DIMINISHING TO 30 KT.
FREEZING SPRAY. SNOW SHOWERS IN THE MORNING, THEN CHANCE OF SNOW
SHOWERS IN THE AFTERNOON. WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT
SUBSIDING TO 8 TO 11 FT OCCASIONALLY TO 14 FT.
WEDNESDAY NIGHT
WEST WINDS 15 TO 25 KT BECOMING NORTHWEST
10 TO 20 KT. CHANCE OF SNOW SHOWERS IN THE EVENING, THEN CHANCE
OF FLURRIES OVERNIGHT. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT
SUBSIDING TO 3 TO 5 FT.
THURSDAY
NORTHWEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
THURSDAY NIGHT
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST.
WAVES 3 TO 5 FT SUBSIDING TO 1 TO 3 FT.
FRIDAY
WEST WINDS 15 TO 25 KT BECOMING SOUTHWEST TO 30 KT.
WAVES 2 TO 4 FT BUILDING TO 3 TO 5 FT.
FRIDAY NIGHT
SOUTHWEST GALES TO 35 KT. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
SATURDAY
SOUTHWEST WINDS TO 30 KT BECOMING WEST. WAVES 5 TO
8 FT OCCASIONALLY TO 10 FT SUBSIDING TO 4 TO 7 FT OCCASIONALLY TO
9 FT.
SUNDAY
WEST WINDS 15 TO 25 KT. WAVES 4 TO 6 FT OCCASIONALLY TO
8 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-221015-
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-
912 PM CST TUE JAN 21 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH WEDNESDAY
AFTERNOON...
...GALE WARNING IN EFFECT FROM 4 AM CST WEDNESDAY THROUGH
WEDNESDAY AFTERNOON...
REST OF TONIGHT
SOUTHWEST WINDS 15 TO 25 KT BECOMING SOUTH
GALES TO 35 KT. HEAVY FREEZING SPRAY. CHANCE OF SNOW SHOWERS.
WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO 8 TO 11 FT
OCCASIONALLY TO 14 FT.
WEDNESDAY
SOUTHWEST GALES TO 35 KT DIMINISHING TO 30 KT. HEAVY
FREEZING SPRAY IN THE MORNING, THEN FREEZING SPRAY IN THE
AFTERNOON. CHANCE OF SNOW SHOWERS. WAVES 10 TO 14 FT OCCASIONALLY
TO 18 FT SUBSIDING TO 8 TO 11 FT OCCASIONALLY TO 14 FT.
WEDNESDAY NIGHT
SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO
25 KT LATE IN THE EVENING, THEN BECOMING WEST 10 TO 20 KT AFTER
MIDNIGHT BECOMING NORTHWEST LATE. SNOW SHOWERS LIKELY IN THE
EVENING, THEN CHANCE OF SNOW OVERNIGHT. WAVES 7 TO 10 FT
OCCASIONALLY TO 13 FT SUBSIDING TO 4 TO 6 FT OCCASIONALLY TO
8 FT.
THURSDAY
NORTHWEST WINDS 10 TO 20 KT. CHANCE OF SNOW. WAVES
4 TO 7 FT OCCASIONALLY TO 9 FT.
THURSDAY NIGHT
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST 10 TO
15 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO
4 FT.
FRIDAY
WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST. WAVES 2 TO
4 FT BUILDING TO 3 TO 5 FT.
FRIDAY NIGHT
SOUTHWEST WINDS TO 30 KT. WAVES 6 TO 9 FT
OCCASIONALLY TO 12 FT.
SATURDAY
SOUTHWEST WINDS 15 TO 25 KT BECOMING WEST. WAVES 6 TO
9 FT OCCASIONALLY TO 12 FT.
SUNDAY
WEST WINDS 10 TO 20 KT. WAVES 4 TO 7 FT OCCASIONALLY TO
9 FT.
LMZ761-221015-
MAFOR 2205/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11542 11552 13557 11540
12630. WAVES 3 TO 6 FEET BUILDING TO 8 TO 11 FEET OVERNIGHT.
WAVES 9 TO 13 FEET SUBSIDING TO 7 TO 10 FEET WEDNESDAY. WAVES 6
TO 9 FEET SUBSIDING TO 4 TO 7 FEET WEDNESDAY EVENING.
MICHIGAN SOUTH...GALE WARNING IN EFFECT...11542 11552 11452 12557
11540 11547 11537. WAVES 3 TO 6 FEET BUILDING TO 8 TO 11 FEET
OVERNIGHT. WAVES 9 TO 13 FEET SUBSIDING TO 8 TO 11 FEET
WEDNESDAY. WAVES 5 TO 9 FEET WEDNESDAY EVENING.
MH
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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