819
FZUS63 KMKX 050912
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
312 AM CST Wed Feb 5 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 over northeast Minnesota will
move across the Great Lakes and into New England today. Winds
will shift southeasterly and increase this afternoon, becoming
southerly tonight.

Low pressure around 29.7 inches over southeast Manitoba tonight
will shift into east central Ontario Thursday, strengthening to
29.3 inches. The low will push further to the east Thursday night,
as high pressure around 30.4 inches moves into the northern
Plains.

The combination of these features will allow for strong west to
northwest winds to develop Thursday into Thursday night across
Lake Michigan. A Gale Warning has been issued for most of this
period. High waves are expected across eastern portions of the
lake during this period. Freezing spray is also expected Thursday
night into Friday.

High pressure around 30.3 inches will move into the region Friday
and to the east Friday night. This will result in westerly winds
gradually subsiding during this period.

LMZ261-362-364-366-563-565-567-669-868-870-051630-
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 Sheboygan to Port Washington WI 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-
312 AM CST Wed Feb 5 2025

PORT WASHINGTON WI TO WHITEHALL MI NORTH...

...GALE WARNING IN EFFECT FROM THURSDAY MORNING THROUGH LATE
THURSDAY NIGHT...

.TODAY...North winds 5 to 10 kt veering to east late this
morning, then becoming southeast 10 to 20 kt this afternoon.
Chance of flurries. Waves 2 to 4 ft.
.TONIGHT...Southeast winds 15 to 25 kt becoming south 10 to
20 kt. Chance of snow, slight chance of drizzle and light
freezing drizzle. Waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft.
.THURSDAY...Southwest winds 15 to 25 kt increasing to gales to
35 kt late in the morning, then becoming west gales to 45 kt in
the afternoon. Chance of snow in the morning. Waves 4 to 6 ft
occasionally to 8 ft building to 10 to 14 ft occasionally to
18 ft.
.THURSDAY NIGHT...West gales to 45 kt becoming northwest gales to
35 kt overnight. Freezing spray. Waves 10 to 14 ft occasionally
to 18 ft.
.FRIDAY...West winds to 30 kt diminishing to 10 to 20 kt in the
afternoon. Freezing spray in the morning. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 3 to 5 ft.
.FRIDAY NIGHT...West winds 10 to 20 kt becoming north. Waves 1 to
3 ft.
.SATURDAY...East winds 10 to 20 kt. Chance of snow. Waves 2 to
4 ft building to 3 to 5 ft.
.SUNDAY...Northwest winds 10 to 20 kt becoming west. Waves 3 to
5 ft.

$$

LMZ080-671-673-675-777-779-872-874-876-878-051630-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
312 AM CST Wed Feb 5 2025

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

...GALE WARNING IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE
THURSDAY NIGHT...

.TODAY...East winds 10 to 15 kt becoming southeast 10 to 20 kt.
Chance of flurries. Waves 2 to 4 ft.
.TONIGHT...Southeast winds 15 to 25 kt becoming south 10 to
20 kt. Chance of drizzle and slight chance of light freezing
drizzle in the evening, then slight chance of drizzle, light
freezing drizzle and snow overnight. Waves 4 to 7 ft occasionally
to 9 ft.
.THURSDAY...Southwest winds 15 to 25 kt becoming west gales to
45 kt. Waves 3 to 5 ft building to 8 to 12 ft occasionally to
16 ft.
.THURSDAY NIGHT...West gales to 45 kt becoming northwest gales to
35 kt overnight. Freezing spray overnight. Waves 10 to 14 ft
occasionally to 18 ft.
.FRIDAY...Northwest winds 10 to 20 kt becoming west. Waves 6 to
9 ft occasionally to 12 ft subsiding to 3 to 5 ft.
.FRIDAY NIGHT...West winds 10 to 15 kt veering to northeast.
Waves 2 to 4 ft subsiding to 1 to 2 ft.
.SATURDAY...East winds 10 to 20 kt. Chance of snow. Waves 2 to
4 ft building to 3 to 5 ft.
.SUNDAY...Northwest winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft.

$$

LMZ761-051630-
MAFOR 0511/
MICHIGAN NORTH 11700 11800 11410 11310 11320 12330 11437. Waves 1
to 3 feet today. Waves 2 to 4 feet building to 3 to 6 feet
tonight.

MICHIGAN SOUTH 12210 12320 12330 11337 11420. A chance of light
freezing drizzle this evening. Waves 1 to 3 feet building to 2 to
4 feet today. Waves 3 to 6 feet tonight.

$$
Wood

Experimental modernized open lake forecast is available online at
weather.gov/mkx/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes