372
FZUS63 KMKX 220317
GLFLM
OPEN LAKE FORECAST FOR LAKE MICHIGAN
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
917 PM CST WED JAN 21 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
LOW PRESSURE OF 29.6 INCHES WILL CROSS LAKE SUPERIOR THIS EVENING.
AN ARCTIC FRONT WILL SURGE THROUGH WISCONSIN AND ACROSS LAKE
MICHIGAN OVERNIGHT. GALE FORCE GUSTS ARE EXPECTED OVER THE
SOUTHERN TWO THIRDS OF LAKE MICHIGAN, WHERE A GALE WARNING IS IN
EFFECT FROM NOW THROUGH MID THURSDAY MORNING. GUSTY WESTERLY
WINDS WILL GRADUALLY DIMINISH FRIDAY AFTERNOON AND NIGHT AS STRONG
HIGH PRESSURE AROUND 31.0 INCHES OVER THE NORTHERN PLAINS EXPANDS
INTO THE UPPER MIDWEST. A NEW GALE WARNING OR AN EXTENSION WILL
LIKELY BE NEEDED WITH THE GUSTY WEST WINDS.
ARRIVING ARCTIC AIR AND ELEVATED WAVE HEIGHTS WILL SUPPORT
PERIODS OF HEAVY FREEZING SPRAY TONIGHT INTO FRIDAY NIGHT. A
HEAVY FREEZING SPRAY WARNING IS IN EFFECT FOR THIS PERIOD.
THE HIGH WILL EXPAND ACROSS THE GREAT LAKES OVER THE WEEKEND
WHILE WEAKENING TO 30.5 INCHES. A WEAK TROUGH AROUND 30.2 INCHES
WILL CROSS LAKE SUPERIOR SUNDAY. THE STRONG HIGH OF 30.7 INCHES
OVER THE NORTHERN PLAINS WILL DROP INTO THE CENTRAL PLAINS AT
AROUND 30.5 INCHES ON MONDAY. A LOW PRESSURE TROUGH AVERAGING 29.8
INCHES WILL SWEEP ACROSS THE UPPER GREAT LAKES MONDAY AFTERNOON
AND NIGHT.
LMZ261-362-364-366-563-565-221100-
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-
917 PM CST WED JAN 21 2026
TWO RIVERS WI TO MANISTEE MI NORTH...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH LATE FRIDAY
NIGHT...
REST OF TONIGHT
WEST WINDS TO 30 KT INCREASING TO GALES TO
35 KT. FREEZING SPRAY THROUGH EARLY EVENING, THEN HEAVY FREEZING
SPRAY OVERNIGHT. WAVES 4 TO 7 FT OCCASIONALLY TO 9 FT BUILDING TO
7 TO 10 FT OCCASIONALLY TO 13 FT.
THURSDAY
WEST GALES TO 35 KT. HEAVY FREEZING SPRAY. CHANCE OF
FLURRIES IN THE AFTERNOON. WAVES 7 TO 10 FT OCCASIONALLY TO 13 FT
BUILDING TO 8 TO 11 FT OCCASIONALLY TO 14 FT.
THURSDAY NIGHT
WEST GALES TO 35 KT BECOMING NORTHWEST TO
30 KT. HEAVY FREEZING SPRAY. WAVES 8 TO 11 FT OCCASIONALLY TO
14 FT SUBSIDING TO 7 TO 10 FT OCCASIONALLY TO 13 FT.
FRIDAY
NORTHWEST WINDS TO 30 KT. CHANCE OF SNOW IN THE
MORNING. HEAVY FREEZING SPRAY. WAVES 7 TO 10 FT OCCASIONALLY TO
13 FT.
FRIDAY NIGHT
NORTHWEST WINDS 15 TO 25 KT DIMINISHING TO 10 TO
20 KT. WAVES 4 TO 6 FT OCCASIONALLY TO 8 FT SUBSIDING TO 2 TO
4 FT.
SATURDAY
NORTHWEST WINDS 10 TO 15 KT BECOMING WEST. WAVES 1 TO
3 FT.
SATURDAY NIGHT
SOUTHWEST WINDS 5 TO 10 KT INCREASING TO 10 TO
15 KT. WAVES 1 TO 3 FT.
SUNDAY
SOUTHEAST WINDS 10 TO 15 KT BECOMING EAST. WAVES 1 TO
3 FT.
MONDAY
WEST WINDS 10 TO 20 KT. WAVES 3 TO 5 FT.
LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-221100-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 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 PENTWATER TO MANISTEE MI 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-
917 PM CST WED JAN 21 2026
TWO RIVERS WI TO MANISTEE MI SOUTH...
..GALE WARNING IN EFFECT UNTIL 8 AM CST THURSDAY
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH LATE FRIDAY
NIGHT...
REST OF TONIGHT
WEST WINDS TO 30 KT INCREASING TO GALES TO
35 KT. CHANCE OF SNOW THROUGH EARLY EVENING. FREEZING SPRAY
OVERNIGHT. WAVES 6 TO 9 FT OCCASIONALLY TO 12 FT BUILDING TO 8 TO
12 FT OCCASIONALLY TO 16 FT.
THURSDAY
WEST GALES TO 35 KT INCREASING TO GALES TO 40 KT.
FREEZING SPRAY. CHANCE OF FLURRIES AND SLIGHT CHANCE OF LIGHT
FREEZING RAIN IN THE AFTERNOON. WAVES 8 TO 12 FT OCCASIONALLY TO
16 FT.
THURSDAY NIGHT
WEST GALES TO 40 KT BECOMING NORTHWEST TO
30 KT. CHANCE OF SNOW IN THE EVENING. HEAVY FREEZING SPRAY. WAVES
8 TO 12 FT OCCASIONALLY TO 16 FT.
FRIDAY
NORTHWEST WINDS TO 30 KT. HEAVY FREEZING SPRAY. CHANCE
OF SNOW. WAVES 8 TO 12 FT OCCASIONALLY TO 16 FT SUBSIDING TO 7 TO
10 FT OCCASIONALLY TO 13 FT.
FRIDAY NIGHT
NORTHWEST WINDS 10 TO 20 KT. HEAVY FREEZING SPRAY
IN THE EVENING. CHANCE OF SNOW. WAVES 5 TO 8 FT OCCASIONALLY TO
10 FT SUBSIDING TO 3 TO 5 FT.
SATURDAY
NORTH WINDS 10 TO 15 KT. CHANCE OF SNOW. WAVES 2 TO
4 FT.
SATURDAY NIGHT
EAST WINDS 10 TO 15 KT. CHANCE OF SNOW. WAVES
2 TO 4 FT.
SUNDAY
EAST WINDS 10 TO 15 KT BECOMING NORTHEAST. CHANCE OF
SNOW. WAVES 2 TO 4 FT.
MONDAY
WEST WINDS 10 TO 20 KT. FREEZING SPRAY. WAVES 4 TO 6 FT
OCCASIONALLY TO 8 FT.
LMZ761-221100-
MAFOR 2205/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11640 12652 12642 12652
11752. WAVES 4 TO 7 FEET BUILDING TO 6 TO 10 FEET OVERNIGHT.
WAVES 6 TO 10 FEET BUILDING TO 8 TO 11 FEET THURSDAY. WAVES 7 TO
11 FEET THURSDAY EVENING.
MICHIGAN SOUTH...GALE WARNING IN EFFECT...11750 12650 12640 12650
11652. A CHANCE OF SNOW LATE THIS EVENING AND THURSDAY EVENING.
WAVES 5 TO 8 FEET BUILDING TO 8 TO 12 FEET OVERNIGHT. WAVES 7 TO
11 FEET BUILDING TO 9 TO 12 FEET THURSDAY. WAVES 9 TO 12 FEET
THURSDAY EVENING.
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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