Great Lakes Forecast
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FZUS63 KLOT 231359
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
859 AM CDT Wed Aug 23 2017

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 29.2 inches just east of James Bay
will gradually shift northeast over the next few days while while
slowly filling. Farther west, high pressure of 30.1 inches will
continue to spread east through the middle and upper Mississippi
Valley today. The high will eventually drift east to the western
Lakes by early Thursday, then will remain in place and strengthen
to 30.2 inches while drifting very slowly east, moving east of the
Great Lakes region on Sunday.

LMZ261-362-364-366-563-565-567-868-232115-
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-
859 AM CDT Wed Aug 23 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northwest winds 15 to 25 kt becoming north 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5
ft.
.TONIGHT...North winds 10 to 20 kt. Waves 3 to 5 ft subsiding to
2 to 4 ft.
.THURSDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt becoming northeast
10 to 15 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.FRIDAY...Northeast winds 5 to 10 kt becoming north. Waves 1 ft
or less.
.FRIDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 ft or less.
.SATURDAY...East winds 5 to 10 kt. Waves nearly calm.
.SUNDAY...South winds 10 to 20 kt becoming southeast. Waves 1 to
2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-232115-
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-
859 AM CDT Wed Aug 23 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northwest winds 15 to 25 kt becoming north 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.TONIGHT...North winds 10 to 20 kt becoming northeast 10 to
15 kt. Chance of waterspouts overnight. Slight chance of showers
overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.THURSDAY...Northeast winds 10 to 20 kt becoming north. Chance of
waterspouts in the morning. Waves 2 to 4 ft.
.THURSDAY NIGHT...Northeast winds 10 to 20 kt diminishing to
10 to 15 kt. Waves 2 to 4 ft.
.FRIDAY...East winds 10 to 15 kt becoming northeast. Waves 1 to
2 ft.
.FRIDAY NIGHT...Northeast winds 10 to 15 kt becoming east. Waves
1 ft or less.
.SATURDAY...Southeast winds 5 to 10 kt. Waves 1 ft or less.
.SUNDAY...Southeast winds 10 to 20 kt. Waves 1 to 2 ft.

$$
LMZ761-232115-
MAFOR 2315/
MICHIGAN NORTH 11730 11720 15820. Waves 4 to 6 feet occasionally
to 8 feet subsiding to 3 to 5 feet today. Waves 3 to 5 feet
subsiding to 2 to 4 feet tonight. Waves 2 to 4 feet Thursday
morning.

MICHIGAN SOUTH 11730 13820 11810 13110. Waves 4 to 7 feet
occasionally to 9 feet subsiding to 4 to 6 feet occasionally to 8
feet today. Waves 3 to 5 feet subsiding to 2 to 4 feet tonight.
Waves 2 to 4 feet Thursday morning.

$$


Rodriguez

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

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



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