778
FZUS63 KMKX 191931
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
231 PM CDT Thu Sep 19 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 30.0 inches over the lower Great Lakes will
gradually weaken, while low pressure around 29.4 inches tracks
northeast across Manitoba, Canada. This will produce light to
modest south to southeast winds into Friday. A weak cool front
will push southeastward across the open waters Friday evening,
bringing scattered showers and isolated thunderstorms from late
tonight into Friday evening.

Weak high pressure will then settle over the lake for Saturday
morning, followed by the passage of a weak wave of low pressure
around 29.7 inches for late Saturday night and Sunday. Light to
modest southeasterly winds can be expected ahead of this low.

LMZ261-362-364-366-563-565-567-868-200345-
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-
231 PM CDT Thu Sep 19 2024

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...Southeast winds 10 to 20 kt becoming south. Chance of
showers and slight chance of thunderstorms overnight. Waves 1 to
3 ft.
.FRIDAY...South winds 10 to 20 kt diminishing to 10 to 15 kt.
Chance of showers and thunderstorms. Waves 2 to 4 ft.
.FRIDAY NIGHT...South winds 10 to 15 kt becoming west. Patchy fog
overnight. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.SATURDAY...West winds 5 to 10 kt backing to south. Patchy dense
fog in the morning. Waves 1 to 2 ft.
.SATURDAY NIGHT...Southeast winds 5 to 10 kt. Waves 1 ft or less.
.SUNDAY...South winds 10 to 15 kt veering to northwest 10 to
20 kt. Chance of showers. Waves 1 to 3 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt. Showers likely. Waves
2 to 4 ft.
.MONDAY...North winds 10 to 20 kt. Chance of showers and
thunderstorms. Waves 2 to 4 ft.
.TUESDAY...Southeast winds 10 to 20 kt becoming south. Chance of
showers. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-200345-
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-
231 PM CDT Thu Sep 19 2024

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Southeast winds 10 to 20 kt becoming south. Chance of
showers overnight. Waves 1 to 2 ft.
.FRIDAY...South winds 10 to 20 kt diminishing to 10 to 15 kt.
Chance of showers and slight chance of thunderstorms. Waves 1 to
3 ft.
.FRIDAY NIGHT...South winds 5 to 10 kt veering to northwest.
Waves 1 to 3 ft subsiding to 1 ft or less.
.SATURDAY...Northeast winds 5 to 10 kt becoming southeast. Waves
1 ft or less.
.SATURDAY NIGHT...East winds 5 to 10 kt becoming southeast. Waves
1 to 2 ft.
.SUNDAY...South winds 10 to 15 kt becoming southwest 10 to 20 kt.
Chance of showers in the morning, then chance of showers and
thunderstorms in the afternoon. Waves 1 to 3 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt. Showers with a chance of
thunderstorms. Waves 2 to 4 ft.
.MONDAY...North winds 10 to 20 kt. Chance of showers. Waves 3 to
5 ft.
.TUESDAY...South winds 10 to 20 kt becoming southwest. Waves 2 to
4 ft.

$$

LMZ761-200345-
MAFOR 1922/
MICHIGAN NORTH 11320 11310 11410 14420 11410. A chance of showers
overnight. A chance of showers and thunderstorms Friday. Waves 2
feet or less tonight. Waves 1 to 3 feet Friday.

MICHIGAN SOUTH 11320 11310 11320 11420 11410 11420 12410. A
chance of showers overnight and Friday. Waves 2 feet or less.

$$


Gehring

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

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