872
FZUS63 KMKX 182039
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
239 PM CST Tue Feb 18 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 of 31.1 inches centered over the northern
Plains will strengthen slightly into this evening as it slips a
bit further south. This will continue to bring brisk northwest
winds into this evening. The ridge of high pressure will build
southeastward, closer to the western Great Lakes tonight bringing
lighter northwesterly winds back to the region. Lighter
northwesterly winds linger through Thursday night as high pressure
slowly slides southward and weakens to 30.7 inches through the
eastern Great Plains.

LMZ261-362-364-366-563-565-567-868-190415-
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-
239 PM CST Tue Feb 18 2025

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Chance of snow and slight chance of light freezing rain
this evening, then slight chance of light freezing rain and snow
overnight. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt diminishing to 10 to
15 kt. Slight chance of snow in the morning, then chance of snow
in the afternoon. Waves 2 to 4 ft.
.WEDNESDAY NIGHT...North winds 10 to 20 kt. Chance of snow. Waves
2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.THURSDAY...North winds 10 to 20 kt. Waves 4 to 6 ft occasionally
to 8 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt becoming northwest.
Waves 3 to 5 ft subsiding to 2 to 4 ft.
.FRIDAY...West winds 10 to 15 kt becoming southwest 15 to 25 kt
in the afternoon. Waves 1 to 3 ft building to 2 to 4 ft.
.FRIDAY NIGHT...Southwest winds to 30 kt increasing to gales to
35 kt. Waves 4 to 7 ft occasionally to 9 ft.
.SATURDAY...Southwest winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.SUNDAY...West winds 10 to 20 kt becoming southwest. Waves 2 to
4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190415-
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-
239 PM CST Tue Feb 18 2025

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northwest winds 10 to 20 kt. Chance of snow and slight
chance of light freezing rain this evening, then chance of snow
overnight. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.WEDNESDAY...Northwest winds 10 to 15 kt. Chance of snow in the
morning, then slight chance of snow in the afternoon. Waves 2 to
4 ft.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 kt increasing to
15 to 25 kt. Chance of snow. Waves 2 to 4 ft building to 4 to
7 ft occasionally to 9 ft.
.THURSDAY...Northwest winds 15 to 25 kt. Waves 5 to 8 ft
occasionally to 10 ft.
.THURSDAY NIGHT...Northwest winds 10 to 20 kt diminishing to
10 to 15 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to
3 to 5 ft.
.FRIDAY...West winds 10 to 15 kt becoming southwest 10 to 20 kt.
Waves 2 to 4 ft.
.FRIDAY NIGHT...Southwest winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.SATURDAY...Southwest winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.SUNDAY...Southwest winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ761-190415-
MAFOR 1823/
MICHIGAN NORTH 13730 12720 11810 12710. A chance of snow this
evening and Wednesday afternoon. Waves 3 to 5 feet subsiding to 2
to 4 feet tonight. Waves 1 to 3 feet Wednesday.

MICHIGAN SOUTH 13720 14710 11710. A chance of snow tonight and
Wednesday morning. Waves 3 to 5 feet subsiding to 2 to 4 feet
tonight. Waves 2 to 4 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