Great Lakes Forecast
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766
FZUS63 KLOT 211337
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
837 AM CDT Thu Sep 21 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...High pressure averaging 30.1 inches will persist
across the eastern U.S. through early next week. Low pressure of
29.4 inches over northern Manitoba will move to Hudson Bay Friday.
A weak cold front over the central portion of the lake this
morning will lift north as a warm front tonight. A trough of low
pressure averaging 29.6 inches will stretch from the northern
Mississippi Valley through the southern Plains Friday. This trough
will remain stationary and gradually weaken through early next
week.

LMZ261-362-364-366-563-565-567-868-212145-
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-
837 AM CDT Thu Sep 21 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northeast winds 10 to 15 kt becoming east. Waves
1 to 3 ft.
.TONIGHT...Southeast winds 5 to 10 kt increasing to 10 to 15 kt
late in the evening...then becoming south 10 to 20 kt overnight.
Slight chance of showers and thunderstorms. Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt. Waves 2 to 4 ft.
.SATURDAY...Southwest winds 10 to 20 kt becoming south. Waves
2 to 4 ft.
.SATURDAY NIGHT...South winds 10 to 20 kt. Waves 2 to 4 ft.
.SUNDAY...South winds 10 to 20 kt. Waves 1 to 3 ft.
.MONDAY...South winds 10 to 20 kt. Waves 1 to 2 ft.

$$

LMZ080-675-777-779-876-878-212145-
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-
837 AM CDT Thu Sep 21 2017

WIND POINT WI TO HOLLAND MI SOUTH...

.REST OF TODAY...South winds 10 to 15 kt becoming southeast.
Waves 1 to 2 ft.
.TONIGHT...Southeast winds 10 to 20 kt becoming south. Waves 1 to
3 ft.
.FRIDAY...South winds 10 to 15 kt becoming southeast. Waves 1 to
2 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt. Waves 1 to 2 ft.
.SATURDAY...South winds 10 to 15 kt becoming southeast. Waves
1 to 2 ft.
.SATURDAY NIGHT...Southeast winds 10 to 15 kt becoming south.
Waves 1 ft or less.
.SUNDAY...South winds 10 to 15 kt becoming southeast. Waves 1 ft
or less.
.MONDAY...South winds 10 to 15 kt becoming southeast. Waves 1 to
2 ft.

$$

LMZ669-671-673-870-872-874-212145-
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-
837 AM CDT Thu Sep 21 2017

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

.REST OF TODAY...North winds 5 to 10 kt becoming southeast this
afternoon. Waves 1 to 2 ft.
.TONIGHT...Southeast winds 10 to 15 kt becoming south 10 to
20 kt. Slight chance of showers and thunderstorms in the evening.
Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.FRIDAY NIGHT...South winds 10 to 20 kt. Waves 1 to 3 ft.
.SATURDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.SATURDAY NIGHT...South winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 2 ft.
.SUNDAY...South winds 10 to 15 kt. Waves 1 to 2 ft.
.MONDAY...South winds 10 to 15 kt. Waves 1 to 2 ft.

$$

LMZ761-212145-
MAFOR 2115/
MICHIGAN NORTH 12110 11200 11300 11310 11410 12420. Chance of
showers and thunderstorms Friday morning. Waves 1 to 3 feet.

MICHIGAN SOUTH 11410 11400 12310 12410 11420 11410. 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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