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000
FZUS63 KMKX 171955
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
255 PM CDT Wed Apr 17 2024

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 29.5 inches over northern Wisconsin will progress
into northern Lake Michigan this evening while weakening to 29.6
inches. Winds will shift accordingly from southwesterly to
westerly across the southern half of the lake, while easterly
gales slowly diminish in the northern third and easterly winds
slowly diminish across the remainder of the northern half. Winds
will diminish tonight as the low crosses the lake. Low pressure of
29.8 inches then settles over Ontario Thursday night, leading to
gusty westerly winds Friday into Saturday.

LMZ080-673-675-777-779-874-876-878-180315-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
255 PM CDT Wed Apr 17 2024

NORTH POINT LIGHT WI TO GRAND HAVEN MI SOUTH...

.TONIGHT...West winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft.
.THURSDAY...West winds 10 to 20 kt diminishing to 10 to 15 kt
late in the morning, then diminishing to 5 to 10 kt early in the
afternoon veering to north 10 to 15 kt late. Chance of rain
showers in the afternoon. Waves 2 to 4 ft subsiding to 1 to 2 ft.
.THURSDAY NIGHT...North winds 10 to 15 kt becoming northwest
after midnight, then increasing to 15 to 25 kt late. Rain
showers. Waves 1 to 2 ft building to 3 to 5 ft.
.FRIDAY...Northwest winds 15 to 25 kt becoming west to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.FRIDAY NIGHT...West winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...Northwest winds to 30 kt. Waves 5 to 8 ft
occasionally to 10 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt diminishing to
10 to 15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SUNDAY...Northwest winds 10 to 15 kt backing to southwest. Waves
1 to 3 ft.
.MONDAY...Southwest winds 10 to 15 kt becoming south 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ364-366-563-565-567-669-671-868-870-872-180315-
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 Port Washington to North Point Light 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-
Lake Michigan from Grand Haven to Whitehall MI 5 NM offshore to
Mid Lake-
255 PM CDT Wed Apr 17 2024

ROCK ISLAND PASSAGE TO CHARLEVOIX MI SOUTH TO NORTH POINT LIGHT
WI TO GRAND HAVEN MI...

.TONIGHT...Southwest winds to 30 kt becoming west 15 to 25 kt.
Chance of rain showers this evening. Waves 4 to 6 ft occasionally
to 8 ft.
.THURSDAY...West winds 10 to 20 kt becoming southwest 10 to
15 kt. Slight chance of rain showers in the morning, then chance
of rain showers in the afternoon. Waves 2 to 4 ft subsiding to
1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 10 to 15 kt becoming west 10 to
20 kt after midnight, then increasing to 15 to 25 kt late. Chance
of rain showers. Waves 1 to 2 ft building to 2 to 4 ft.
.FRIDAY...West winds 15 to 25 kt increasing to 30 kt. Waves 4 to
6 ft occasionally to 8 ft.
.FRIDAY NIGHT...West winds 15 to 25 kt. Waves 4 to 6 ft
occasionally to 8 ft building to 4 to 7 ft occasionally to 9 ft.
.SATURDAY...West winds to 30 kt becoming northwest. Waves 5 to
8 ft occasionally to 10 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt becoming west.
Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SUNDAY...West winds 10 to 20 kt becoming southwest. Waves 1 to
3 ft.
.MONDAY...Southwest winds 10 to 15 kt becoming south 10 to 20 kt.
Waves 2 to 4 ft.

$$

LMZ261-362-180315-
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-
255 PM CDT Wed Apr 17 2024

ROCK ISLAND PASSAGE TO CHARLEVOIX MI NORTH...

...GALE WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING...

.TONIGHT...Southeast gales to 35 kt becoming south 15 to 25 kt
late this evening, then becoming west 10 to 20 kt overnight.
Chance of rain showers this evening, then slight chance of rain
showers overnight. Waves 4 to 7 ft occasionally to 9 ft subsiding
to 3 to 5 ft.
.THURSDAY...West winds 10 to 20 kt becoming southwest 10 to
15 kt. Slight chance of rain showers in the afternoon. Waves 2 to
4 ft subsiding to 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 10 to 15 kt becoming west.
Chance of rain showers. Waves 1 to 2 ft.
.FRIDAY...West winds 15 to 25 kt increasing to 30 kt. Waves 2 to
4 ft building to 4 to 6 ft occasionally to 8 ft.
.FRIDAY NIGHT...West winds 15 to 25 kt. Waves 3 to 5 ft.
.SATURDAY...West winds 15 to 25 kt becoming northwest to 30 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...Northwest winds 15 to 25 kt becoming west 10 to
20 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.SUNDAY...West winds 10 to 20 kt becoming southwest 15 to 25 kt.
Waves 1 to 3 ft.
.MONDAY...Southwest winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.

$$

LMZ761-180315-
MAFOR 1722/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11450 11540 12630 11620
11610 11520 11510. A chance of showers this evening. Waves 5 to 8
feet subsiding to 3 to 5 feet tonight. Waves 1 to 3 feet
Thursday.

MICHIGAN SOUTH 12640 12630 11620 11610 11600 11710. A chance of
showers Thursday afternoon. Waves 3 to 5 feet subsiding to 2 to 4
feet tonight. Waves 1 to 3 feet subsiding to 1 foot or less
Thursday.

$$


MH

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

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