017
FZUS63 KMKX 212057
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
257 PM CST FRI FEB 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
HIGH PRESSURE AROUND 30.6 INCHES CONTINUE TO MOVE EAST-SOUTHEAST
UP THE OHIO RIVER VALLEY THROUGH THE EVENING AND HAS BROUGHT
SOUTHWESTERLY WINDS TO LAKE MICHIGAN. AS THE HIGH PRESSURE MOVES
INTO THE MID-ATLANTIC REGION INTO SATURDAY, A LOW PRESSURE AROUND
29.4 INCHES WORKS ITS WAY ACROSS THE HUDSON BAY REGION. WITH LAKE
MICHIGAN IN BETWEEN THE TWO SYSTEMS, EXPECT INCREASING
SOUTHWESTERLY WINDS TO DEVELOP OVERNIGHT INTO SATURDAY WITH GUSTS,
ESPECIALLY ACROSS NORTHERN PORTIONS OF THE LAKE TO APPROACH 30
KT, BUT LIKELY REMAIN BELOW GALE FORCE. WILL ALSO HAVE A WINDOW
FOR MODERATE FREEZING SPRAY OVERNIGHT WITH THE INCREASING WINDS
AND WAVES PAIRED WITH ANOTHER BITTER COLD NIGHT. WILL SEE
SOUTHWESTERLY WINDS AND GRADUALLY WARMER TEMPS SUNDAY INTO EARLY
NEXT WEEK. THERE WILL BE A FEW WEAK LOW PRESSURE TO WORK THEIR WAY
ACROSS THE REGION SUNDAY NIGHT-MONDAY AND ANOTHER ONE MONDAY
NIGHT-TUESDAY. THESE WEAK LOWS ONLY LOOK TO BRING SOME SCATTERED
PRECIP AND BRIEFLY TURN WINDS WEST-NORTHWESTERLY BEFORE RETURNING
SOUTHWESTERLY. THEN A LARGER LOW PRESSURE IS PROGGED TO TRACK
ACROSS THE UPPER MIDWEST WEDNESDAY, WHICH WILL DRAG A COLD FRONT
ACROSS THE LAKE AND TURN WINDS MORE NORTH-NORTHWESTERLY BY THE
SECOND HALF OF THE WEEK.
LMZ261-362-364-366-563-565-567-868-220415-
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-
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-
257 PM CST FRI FEB 21 2025
SHEBOYGAN WI TO PENTWATER MI NORTH...
TONIGHT
SOUTHWEST WINDS TO 30 KT. FREEZING SPRAY OVERNIGHT.
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. FREEZING SPRAY IN THE
MORNING. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO 4 TO
6 FT OCCASIONALLY TO 8 FT.
SATURDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KT BECOMING WEST 10 TO
15 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 3 TO
5 FT.
SUNDAY
SOUTHWEST WINDS 10 TO 15 KT INCREASING TO 10 TO 20 KT.
WAVES 1 TO 3 FT BUILDING TO 2 TO 4 FT.
SUNDAY NIGHT
SOUTHWEST WINDS 15 TO 25 KT INCREASING TO 30 KT.
CHANCE OF SNOW IN THE EVENING, THEN CHANCE OF RAIN AND SNOW
OVERNIGHT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
MONDAY
SOUTHWEST WINDS TO 30 KT DIMINISHING TO 15 TO 25 KT.
WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT.
MONDAY NIGHT
WEST WINDS 10 TO 20 KT DIMINISHING TO 10 TO
15 KT. WAVES 3 TO 5 FT SUBSIDING TO 2 TO 4 FT.
TUESDAY
NORTHWEST WINDS 10 TO 15 KT. WAVES 1 TO 3 FT.
WEDNESDAY
SOUTH WINDS 10 TO 15 KT BECOMING SOUTHWEST 10 TO
20 KT. CHANCE OF RAIN. WAVES 2 TO 4 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-
257 PM CST FRI FEB 21 2025
SHEBOYGAN WI TO PENTWATER MI SOUTH...
TONIGHT
SOUTHWEST WINDS 15 TO 25 KT INCREASING TO 30 KT. WAVES
3 TO 5 FT BUILDING TO 5 TO 8 FT OCCASIONALLY TO 10 FT.
SATURDAY
SOUTHWEST WINDS 15 TO 25 KT. WAVES 5 TO 8 FT
OCCASIONALLY TO 10 FT.
SATURDAY NIGHT
SOUTHWEST WINDS 15 TO 25 KT DIMINISHING TO
10 TO 20 KT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT SUBSIDING TO
3 TO 5 FT.
SUNDAY
SOUTHWEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT.
SUNDAY NIGHT
SOUTHWEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT
BUILDING TO 4 TO 6 FT OCCASIONALLY TO 8 FT.
MONDAY
SOUTHWEST WINDS 15 TO 25 KT. WAVES 4 TO 7 FT
OCCASIONALLY TO 9 FT.
MONDAY NIGHT
WEST WINDS 10 TO 20 KT. CHANCE OF RAIN. WAVES
4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO 4 FT.
TUESDAY
NORTHWEST WINDS 10 TO 20 KT. WAVES 2 TO 4 FT.
WEDNESDAY
SOUTH WINDS 10 TO 20 KT. CHANCE OF RAIN. WAVES 2 TO
4 FT.
LMZ761-220415-
MAFOR 2123/
MICHIGAN NORTH 11530 13540 14530. WAVES 2 TO 4 FEET BUILDING TO 5
TO 8 FEET TONIGHT. WAVES 4 TO 7 FEET SUBSIDING TO 3 TO 6 FEET
SATURDAY.
MICHIGAN SOUTH 11520 11530 12540 14530. WAVES 1 TO 3 FEET
BUILDING TO 5 TO 8 FEET TONIGHT. WAVES 4 TO 7 FEET SATURDAY.
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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