781
FZUS63 KMKX 270802
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
302 AM CDT Fri Sep 27 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...

High pressure around 30.1 inches will shift to the east of the
region today. The remnants of tropical system Helene will move
into the Ohio Valley today, with central pressure expected to be
around 28.9 inches around mid day, weakening to 29.2 late tonight.
This will bring increasing northeast winds over the southern
third of the lake, with gales developing this afternoon and
continuing into tonight. A Gale Warning is now in effect.

The remnants of Helene will continue to weaken to 29.5 inches by
Saturday afternoon, while remaining nearly stationary over the
lower Ohio Valley.

The tropical low will weaken and dissipate by Sunday, with high
pressure around 30.3 inches returning late Sunday, with somewhat
weaker northeast winds.

A strong cold front is then expected to move across the lake late
Monday night or early Tuesday, with winds behind the front
approaching gale force for mid week.

LMZ261-362-364-366-563-565-567-868-271530-
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-
302 AM CDT Fri Sep 27 2024

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...Southeast winds 5 to 10 kt becoming east late this
morning, then becoming northeast early this afternoon becoming
10 to 20 kt late. Areas of dense fog this morning. Waves 1 to
2 ft building to 1 to 3 ft.
.TONIGHT...Northeast winds 10 to 20 kt. Waves 2 to 4 ft.
.SATURDAY...Northeast winds 10 to 20 kt increasing to 15 to
25 kt. Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...Northeast 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.
.SUNDAY...Northeast winds 10 to 20 kt. Waves 3 to 5 ft.
.SUNDAY NIGHT...Northeast winds 10 to 20 kt becoming east 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.MONDAY...Southeast winds 10 to 15 kt becoming south 10 to 20 kt.
Waves 1 to 2 ft.
.TUESDAY...Northwest winds 15 to 25 kt. Chance of showers. Waves
4 to 6 ft occasionally to 8 ft.

$$

LMZ669-671-673-870-872-874-271530-
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 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-
302 AM CDT Fri Sep 27 2024

SHEBOYGAN WI TO PENTWATER MI SOUTH TO WIND POINT WI TO HOLLAND
MI...

.TODAY...Northeast winds 10 to 20 kt increasing to 30 kt. Patchy
dense fog this morning. Waves 4 to 6 ft occasionally to 8 ft.
.TONIGHT...Northeast winds to 30 kt. Slight chance of showers
overnight. Waves 5 to 8 ft occasionally to 10 ft.
.SATURDAY...Northeast winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.SATURDAY NIGHT...Northeast winds 15 to 25 kt diminishing to
10 to 20 kt. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY...Northeast winds 10 to 20 kt becoming north. Waves 4 to
6 ft occasionally to 8 ft.
.SUNDAY NIGHT...Northeast winds 10 to 20 kt becoming east. Waves
3 to 5 ft.
.MONDAY...East winds 10 to 15 kt becoming south 5 to 10 kt. Waves
1 to 3 ft.
.TUESDAY...Northwest winds 15 to 25 kt. Waves 4 to 6 ft
occasionally to 8 ft building to 5 to 8 ft occasionally to 10 ft.


$$

LMZ080-675-777-779-876-878-271530-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
302 AM CDT Fri Sep 27 2024

WIND POINT WI TO HOLLAND MI SOUTH...

...GALE WARNING IN EFFECT FROM THIS AFTERNOON THROUGH LATE
TONIGHT...

.TODAY...Northeast winds 15 to 25 kt increasing to gales to
35 kt. Waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft
occasionally to 10 ft.
.TONIGHT...Northeast gales to 40 kt diminishing to 30 kt. Chance
of showers overnight. Waves 6 to 9 ft occasionally to 12 ft
building to 8 to 11 ft occasionally to 14 ft, then subsiding to
6 to 9 ft occasionally to 12 ft.
.SATURDAY...Northeast winds 15 to 25 kt. Chance of showers. Waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.SATURDAY NIGHT...Northeast winds 15 to 25 kt diminishing to
10 to 20 kt. Chance of showers. Waves 4 to 7 ft occasionally to
9 ft.
.SUNDAY...Northeast winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...Northeast winds 10 to 20 kt becoming east. Waves
3 to 5 ft.
.MONDAY...East winds 10 to 15 kt becoming northeast 5 to 10 kt.
Waves 1 to 3 ft.
.TUESDAY...Northwest winds 15 to 25 kt. Waves 4 to 6 ft
occasionally to 8 ft building to 5 to 8 ft occasionally to 10 ft.


$$

LMZ761-271530-
MAFOR 2710/
MICHIGAN NORTH 11300 19304 11304 11100 13130 11220 11120. Waves 1
foot or less building to 1 to 3 feet today. Waves 2 to 4 feet
subsiding to 1 to 3 feet tonight.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...11130 11134 11150 14150
11140. A chance of showers overnight. Waves 2 to 4 feet building
to 5 to 8 feet today. Waves 6 to 10 feet tonight.

$$


Boxell

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

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