Great Lakes Forecast
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FZUS63 KLOT 110746
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
246 AM CDT Fri Aug 11 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...Weak low pressure of 29.9 inches over the Upper
Peninsula will move to near Lake Huron this afternoon...then into
Quebec Saturday. A 30.1 inch high will build over the Upper
Midwest later today and tonight, before spreading over the lakes
region early next week.

LMZ261-362-364-366-563-565-111530-
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-
246 AM CDT Fri Aug 11 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

.TODAY...West winds 10 to 15 KT becoming Northwest 10 to 20 kt
this morning...then increasing to 15 to 25 kt this afternoon.
Slight chance of showers this morning. Waves 4 to 6 ft
occasionally to 8 ft.
.TONIGHT...Northwest winds 15 to 25 kt becoming north. Waves 4 to
7 ft occasionally to 9 ft.
.SATURDAY...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to
4 ft.
.SATURDAY NIGHT...Northwest winds 10 to 15 kt diminishing to 5 to
10 kt. Waves 1 to 3 ft.
.SUNDAY...West winds 10 to 15 kt becoming southwest. Waves 1 to
2 ft.
.SUNDAY NIGHT...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.
.MONDAY...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.
.TUESDAY...West winds 5 to 10 kt becoming southwest 10 to 15 kt.
Waves 1 ft or less.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-111530-
Lake Michigan from Michigan City IN to St. Joseph MI 5 NM
offshore to Mid Lake-
Lake Michigan from Two Rivers to Sheboygan WI 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 Pentwater to Manistee MI 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-
246 AM CDT Fri Aug 11 2017

TWO RIVERS WI TO MANISTEE MI SOUTH...

.TODAY...West winds 10 to 15 kt becoming northwest 10 to 20 kt
during the morning...then becoming north this afternoon. Waves 2
to 4 ft.
.TONIGHT...North winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...North winds 15 to 25 kt. Waves 4 to 7 ft occasionally
to 9 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt becoming northwest 5 to
10 kt overnight. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SUNDAY...Northwest winds 5 to 10 kt backing to southwest. Waves
1 to 2 ft.
.SUNDAY NIGHT...West winds 5 to 10 kt veering to east. Waves
nearly calm.
.MONDAY...Northeast winds 5 to 10 kt becoming north. Waves nearly
calm.
.TUESDAY...North winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 ft or less.

$$

LMZ761-111530-
MAFOR 1109/
MICHIGAN NORTH 11610 12720 12730 13830. Waves 4 to 6 feet
occasionally top 8 feet today. Waves 4 to 7 feet occasionally to
9 feet tonight.

MICHIGAN SOUTH 11610 12710 11720 13820 11820 19830. Waves 2 to 4
feet today. Waves 3 to 5 feet building to 4 to 6 feet
occasionally to 8 feet tonight.

$$


KJB

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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