888
FZUS63 KMKX 212050
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
250 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 30.8 INCHES OVER THE SOUTHERN GREAT
PLAINS WILL MOVE EAST ACROSS THE OHIO RIVER VALLEY THROUGH
TONIGHT. THIS WILL MAINTAIN BREEZY WEST WINDS ACROSS LAKE MICHIGAN
THROUGH THE REST OF TODAY INTO THIS EVENING, AND SHIFT TO
SOUTHWEST OVERNIGHT INTO WEDNESDAY. BRISK WEST WINDS WILL COMBINE
WITH ELEVATED WAVE HEIGHTS AND FRIGID AIR TEMPERATURES TO SUPPORT
HEAVY FREEZING SPRAY. HEAVY FREEZING SPRAY WARNINGS ARE IN EFFECT
FOR THE SOUTHERN TWO-THIRDS UNTIL THURSDAY 0Z, WHILE THE NORTHERN
THIRD WILL BE ADDED BY 3Z THIS EVENING AND CONTINUE UNTIL 0Z
THURSDAY
LOW PRESSURE AROUND 29.8 INCHES WILL ACROSS THE NORTHERN GREAT LAKES
WEDNESDAY INTO WEDNESDAY NIGHT WITH A COLD FRONT TO FOLLOW. THE
BREEZY SOUTHWEST WINDS LATE TONIGHT INTO EARLY WEDNESDAY AFTERNOON
ARE NOW EXPECTED TO REACH GALE FORCE FOR THE SOUTH HALF, SLIGHTLY
MORE UNCERTAIN FOR THE NORTH HALF BUT GIVEN THE CONSISTENCY IN
MODELS WE HAVE ISSUED A GALE WARNING ACROSS THE ENTIRE LAKE. THE
WINDS WILL THEN SHIFT TO NORTHWESTERLY FOR WEDNESDAY NIGHT AND
THURSDAY, BUT NOT AS WINDY.
LMZ261-362-364-366-563-565-220415-
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-
250 PM CST TUE JAN 21 2025
TWO RIVERS WI TO MANISTEE MI NORTH...
...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 9 PM CST THIS
EVENING THROUGH WEDNESDAY AFTERNOON...
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY
AFTERNOON...
TONIGHT
SOUTHWEST WINDS 15 TO 25 KT INCREASING TO GALES TO
35 KT. HEAVY FREEZING SPRAY. CHANCE OF LIGHT FREEZING RAIN AND
SLIGHT CHANCE OF SNOW THIS EVENING, THEN CHANCE OF SNOW AND
SLIGHT CHANCE OF LIGHT FREEZING RAIN OVERNIGHT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT BUILDING TO 8 TO 11 FT OCCASIONALLY TO
14 FT.
WEDNESDAY
SOUTHWEST GALES TO 35 KT DIMINISHING TO 30 KT.
FREEZING SPRAY. SNOW IN THE MORNING, THEN CHANCE OF SNOW IN THE
AFTERNOON. WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT SUBSIDING TO
7 TO 10 FT OCCASIONALLY TO 13 FT.
WEDNESDAY NIGHT
WEST WINDS 15 TO 25 KT BECOMING NORTHWEST
10 TO 20 KT. CHANCE OF SNOW 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 3 TO 5 FT.
THURSDAY NIGHT
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST.
WAVES 2 TO 4 FT.
FRIDAY
WEST WINDS 15 TO 25 KT BECOMING SOUTHWEST TO 30 KT.
WAVES 1 TO 3 FT BUILDING TO 3 TO 5 FT.
FRIDAY NIGHT
SOUTHWEST GALES TO 35 KT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
SATURDAY
SOUTHWEST WINDS TO 30 KT BECOMING WEST. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT.
SUNDAY
WEST WINDS 15 TO 25 KT. WAVES 3 TO 5 FT.
LMZ567-868-220415-
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-
250 PM CST TUE JAN 21 2025
TWO RIVERS WI TO MANISTEE MI SOUTH TO SHEBOYGAN WI TO PENTWATER
MI...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH WEDNESDAY
AFTERNOON...
...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY
AFTERNOON...
TONIGHT
SOUTHWEST WINDS 10 TO 20 KT INCREASING TO GALES TO
35 KT. HEAVY FREEZING SPRAY. SLIGHT CHANCE OF SNOW THIS EVENING,
THEN CHANCE OF SNOW OVERNIGHT. WAVES 3 TO 5 FT BUILDING TO 8 TO
11 FT OCCASIONALLY TO 14 FT.
WEDNESDAY
SOUTHWEST GALES TO 35 KT DIMINISHING TO 30 KT.
FREEZING SPRAY. SNOW IN THE MORNING, THEN CHANCE OF SNOW IN THE
AFTERNOON. WAVES 10 TO 14 FT OCCASIONALLY TO 18 FT SUBSIDING TO
8 TO 11 FT OCCASIONALLY TO 14 FT.
WEDNESDAY NIGHT
SOUTHWEST WINDS 15 TO 25 KT VEERING TO
NORTHWEST 10 TO 20 KT. CHANCE OF SNOW 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 10 TO 20 KT. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
THURSDAY NIGHT
NORTHWEST WINDS 10 TO 20 KT BECOMING WEST 10 TO
15 KT. WAVES 2 TO 4 FT SUBSIDING TO 1 TO 3 FT.
FRIDAY
WEST WINDS 10 TO 20 KT BECOMING SOUTHWEST. WAVES 1 TO
3 FT BUILDING TO 3 TO 5 FT.
FRIDAY NIGHT
SOUTHWEST WINDS 15 TO 25 KT. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
SATURDAY
SOUTHWEST WINDS 15 TO 25 KT BECOMING WEST. WAVES 4 TO
7 FT OCCASIONALLY TO 9 FT.
SUNDAY
WEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT.
LMZ080-669-671-673-675-777-779-870-872-874-876-878-220415-
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-
250 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 LATE TONIGHT THROUGH WEDNESDAY
AFTERNOON...
TONIGHT
SOUTHWEST WINDS 10 TO 20 KT BECOMING SOUTH GALES TO
35 KT. HEAVY FREEZING SPRAY. CHANCE OF LIGHT FREEZING RAIN THIS
EVENING, THEN SLIGHT CHANCE OF LIGHT FREEZING RAIN OVERNIGHT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 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. WAVES 10 TO 14 FT OCCASIONALLY TO
18 FT SUBSIDING TO 8 TO 12 FT OCCASIONALLY TO 16 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 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 3 TO 5 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 4 TO 7 FT
OCCASIONALLY TO 9 FT BUILDING TO 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 3 TO 5 FT.
LMZ761-220415-
MAFOR 2123/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11630 11532 12542 13557
11540. A CHANCE OF LIGHT FREEZING RAIN THIS EVENING. WAVES 3 TO 6
FEET BUILDING TO 7 TO 10 FEET TONIGHT. WAVES 9 TO 13 FEET
SUBSIDING TO 7 TO 10 FEET WEDNESDAY.
MICHIGAN SOUTH...GALE WARNING IN EFFECT...11520 11530 11542 11552
11452 12557 11540. A CHANCE OF LIGHT FREEZING RAIN THIS EVENING.
WAVES 3 TO 6 FEET BUILDING TO 7 TO 10 FEET TONIGHT. WAVES 9 TO 13
FEET SUBSIDING TO 8 TO 11 FEET WEDNESDAY.
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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