Great Lakes Forecast
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FZUS63 KMKX 091350
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
850 AM CDT Sun Aug 9 2020

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...

South to southwest winds will persist into Monday when a low
pressure system of 29.8 inches moves across Lake Superior. This
system will sweep a across the entire lake. Until then, there
remains a chance for showers and thunderstorms today and again on
Monday. High pressure of 30.0 inches will build in behind the cold
front bring a period of breezy northwesterly winds on Tuesday.

&&

LMZ261-362-364-366-563-565-567-868-092130-
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-
850 AM CDT Sun Aug 9 2020

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...South winds 10 to 20 kt. Slight chance of
showers and thunderstorms through mid morning. Waves 2 to 4 ft.
.TONIGHT...South winds 10 to 20 kt. Slight chance of showers and
thunderstorms in the evening, then chance of showers and
thunderstorms overnight. Waves 3 to 5 ft.
.MONDAY...Southwest winds 10 to 20 kt. Chance of showers and
thunderstorms. Waves 3 to 5 ft.
.MONDAY NIGHT...West winds 10 to 20 kt becoming northwest 10 to
15 kt. Chance of showers and thunderstorms in the evening. Waves
2 to 4 ft subsiding to 1 to 3 ft.
.TUESDAY...Northwest winds 10 to 15 kt becoming southwest 10 to
20 kt. Waves 1 to 2 ft.
.TUESDAY NIGHT...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.
.WEDNESDAY...West winds 5 to 10 kt becoming southwest 10 to
15 kt. Waves 1 ft or less.
.THURSDAY...East winds 5 to 10 kt becoming northeast 10 to 15 kt.
Waves 1 ft or less.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-092130-
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-
850 AM CDT Sun Aug 9 2020

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...South winds 10 to 20 kt. Waves 2 to 4 ft.
.TONIGHT...South winds 10 to 20 kt. Slight chance of showers and
thunderstorms in the evening, then chance of showers and
thunderstorms overnight. Waves 2 to 4 ft.
.MONDAY...South winds 10 to 20 kt diminishing to 10 to 15 kt.
Chance of showers and thunderstorms. Waves 2 to 4 ft.
.MONDAY NIGHT...Southwest winds 10 to 15 kt becoming northwest.
Chance of showers and thunderstorms in the evening. Waves 2 to
4 ft.
.TUESDAY...North winds 10 to 15 kt. Waves 1 to 3 ft.
.TUESDAY NIGHT...North winds 5 to 10 kt becoming northwest. Waves
1 to 2 ft.
.WEDNESDAY...Northeast winds 5 to 10 kt increasing to 10 to
15 kt. Waves 1 ft or less.
.THURSDAY...East winds 10 to 15 kt becoming northeast. Waves 1 to
2 ft.

$$

LMZ761-092130-
MAFOR 0915/
MICHIGAN NORTH 11510 11410 14420 11420 11520. Chance of showers
and thunderstorms overnight and Monday morning. Waves 1 to 3 feet
building to 2 to 4 feet this afternoon. Waves 2 to 4 feet
building to 3 to 5 feet tonight. Waves 2 to 4 feet Monday
morning.

MICHIGAN SOUTH 11410 15420 11520. Chance of showers and
thunderstorms overnight and Monday morning. Waves 1 to 3 feet
this afternoon. Waves 1 to 3 feet building to 2 to 4 feet
tonight. Waves 2 to 4 feet Monday morning.

$$


Stumpf

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

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



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