Great Lakes Forecast
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159
FZUS63 KLOT 220753
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
253 AM CDT Sat Jul 22 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 29.7 inches over western Iowa will
move east across central Illinois and Indiana through this
evening, while another low center of 29.6 inches forms over
northern lower Michigan on Sunday. This low will move off to the
east by Sunday night. High pressure of 30.2 inches will then
spread over the northern and western Great Lakes Monday night and
Tuesday.

LMZ261-362-364-366-563-565-567-868-221515-
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-
253 AM CDT Sat Jul 22 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...South winds 10 to 15 kt early backing to east this
morning and then becoming northeast by early afternoon. Slight
chance of showers and thunderstorms this morning. Waves 1 to 2 ft.
.TONIGHT...Northeast winds 10 to 15 kt veering to southwest.
Chance of showers and slight chance of thunderstorms. Waves 1 to
2 ft.
.SUNDAY...West winds 10 to 20 kt veering to northeast. Chance of
showers in the morning...then chance of showers and thunderstorms
in the afternoon. Waves 1 to 2 ft.
.SUNDAY NIGHT...Northeast winds 15 to 25 kt becoming north. Waves
3 to 5 ft.
.MONDAY...Northeast winds 10 to 20 kt becoming north. Waves 2 to
4 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt veering to southeast
10 to 15 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.TUESDAY...South winds 10 to 20 kt becoming southwest. Waves 1 to
3 ft.
.WEDNESDAY...Southwest winds 15 to 25 kt becoming west 10 to
20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-221515-
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-
253 AM CDT Sat Jul 22 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...South winds 10 to 20 kt backing to north 10 to 15 kt
late this morning. Chance of showers and thunderstorms this
morning. Waves 1 to 3 ft.
.TONIGHT...North winds 5 to 10 kt backing to west 10 to 15 kt.
Slight chance of showers. Waves 1 to 3 ft.
.SUNDAY...West winds 10 to 15 kt. Waves 1 to 2 ft.
.SUNDAY NIGHT...Northwest winds 10 to 20 kt becoming north 15 to
25 kt. Waves 1 to 3 ft building to 3 to 5 ft.
.MONDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt veering to southeast
5 to 10 kt overnight. Waves 1 to 3 ft.
.TUESDAY...Southeast winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.WEDNESDAY...Southwest winds 10 to 20 kt. Chance of showers.
Waves 1 to 3 ft.

$$

LMZ761-221515-
MAFOR 2209/
MICHIGAN NORTH 10410 12210 11100 13110 11210 11410. Chance of
showers and thunderstorms early this morning. Chance of showers
tonight. Waves 1 to 3 feet.

MICHIGAN SOUTH 12420 19320 11110 14810 11700. Chance of showers
and thunderstorms early this morning. Waves 1 to 3 feet.

$$

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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