Great Lakes Forecast
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000
FZUS63 KLOT 221353
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
853 AM CDT Tue Aug 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 29.5 inches over the central Ontario
and Quebec border will deepen to 29.4 inches and into Quebec this
by this afternoon. The low will drag a cold front south down the
lake through early this afternoon. The low will deepen further to
29.2 inches tonight while high pressure of 30.1 inches spreads
southeast across the Plains. 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 into
Saturday.

LMZ261-362-364-366-563-565-567-868-222130-
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-
853 AM CDT Tue Aug 22 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northwest winds 20 to 25 kt easing to 15 to 25 kt
this afternoon. A few gusts around 35 kt possible through late
morning. Slight chance of showers this morning. Waves 4 to 6 ft
occasionally to 8 ft.
.TONIGHT...Northwest winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt becoming north. Waves
4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.WEDNESDAY NIGHT...North winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY...North winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 1 to 3 ft.
.FRIDAY...North winds 5 to 10 kt. Waves 1 to 2 ft.
.SATURDAY...East winds less than 10 kt becoming northeast. Waves
nearly calm.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-222130-
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-
853 AM CDT Tue Aug 22 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...West winds 15 to 25 kt becoming northwest 20 to
25 kt toward midday. A few gusts around 35 kt possible late this
morning and around midday. Slight chance of showers this morning.
Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft
occasionally to 10 ft.
.TONIGHT...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 5 to 8 ft occasionally to 10 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt becoming north. Waves
4 to 7 ft occasionally to 9 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.WEDNESDAY NIGHT...North winds 10 to 20 kt. Waves 3 to 5 ft.
.THURSDAY...North winds 10 to 20 kt. 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...Northeast winds 5 to 10 kt. Waves 1 to 2 ft.
.SATURDAY...Northeast winds less than 10 kt increasing to 5 to
10 kt. Waves 1 ft or less.

$$
LMZ761-222130-
MAFOR 2215/
MICHIGAN NORTH 11730 19750 15730 11720. Waves 4 to 6 feet
occasionally to 8 feet today and 4 to 7 feet occasionally to 9
feet tonight and Wednesday morning.

MICHIGAN SOUTH 11630 19750 15730 11720. Waves 4 to 7 feet
occasionally to 9 feet building to 5 to 8 feet occasionally to 10
feet today. Waves 5 to 8 feet occasionally to 10 feet tonight
subsiding to 4 to 6 feet occasionally to 8 feet Wednesday
morning.


$$

MDB

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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