Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 121500
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
900 AM CST Mon Feb 12 2018

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...Strong high pressure of 30.8 inches will build
across the northern Plains today and across the Great Lakes
region tonight. Low pressure of 29.5 inches is expected to move
across the upper Great Lakes Wednesday night...with a trailing
cold front moving across the lake Thursday. Weak low pressure
will develop along this front Thursday and quickly move to New
England by Friday morning. Another strong high pressure will
build across the Plains Thursday night and Friday.

LMZ261-362-364-366-563-565-567-868-122215-
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-
900 AM CST Mon Feb 12 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northwest winds 10 to 20 kt becoming west 10 to
15 kt. Slight chance of snow through mid morning. Waves 2 to 4 ft.
.TONIGHT...West winds 10 to 15 kt becoming southwest 10 to 20 kt.
Waves 1 to 2 ft.
.TUESDAY...Southwest winds 10 to 20 kt becoming south to 30 kt.
Waves 1 to 3 ft building to 5 to 8 ft occasionally to 10 ft.
.TUESDAY NIGHT...Southwest gales to 35 kt diminishing to 30 kt.
Waves 6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...Southwest winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.WEDNESDAY NIGHT...Southwest winds to 30 kt becoming west 15 to
25 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.THURSDAY...West winds 10 to 20 kt becoming north 15 to 25 kt.
Chance of snow and rain. Waves 2 to 4 ft.
.FRIDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-122215-
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-
900 AM CST Mon Feb 12 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northwest winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 2 to 4 ft.
.TONIGHT...North winds 5 to 10 kt veering to southeast 10 to
15 kt. Waves 1 to 3 ft.
.TUESDAY...Southeast winds 10 to 20 kt becoming south to 30 kt.
Waves 1 to 3 ft building to 4 to 6 ft occasionally to 8 ft.
.TUESDAY NIGHT...South winds to 30 kt becoming southwest. Waves
4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...Southwest winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.WEDNESDAY NIGHT...Southwest winds to 30 kt diminishing to 15 to
25 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.THURSDAY...West winds 10 to 20 kt veering to north 15 to 25 kt.
Chance of rain. Waves 2 to 4 ft.
.FRIDAY...Northwest winds to 30 kt. Freezing spray. Chance of
snow. Waves 6 to 9 ft occasionally to 12 ft.

$$

LMZ761-122215-
MAFOR 1216/
MICHIGAN NORTH 11720 12710 12610 13520. Waves 2 to 4 ft today.
Waves 1 to 2 ft tonight. Waves 1 to 3 ft Tuesday morning.

MICHIGAN SOUTH 11720 12710 11800 11100 11210 12320. Waves 2 to 4
ft today. Waves 1 to 3 ft tonight and Tuesday morning.

$$

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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