Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 120245
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
845 PM CST Thu Jan 11 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...Low pressure of 29.5 inches over western Quebec will
move northeast tonight. A trailing sharp cold front will continue
moving across the lakes region tonight. High pressure of 30.8
inches will build from the plains into the Upper Midwest Friday
into Saturday. Meanwhile...low pressure of 29.4 inches will
organize over the middle Appalachian states. The plains high
pressure area will move into the Great Lakes region on Sunday. A
clipper like low pressure at 30.1 inches will quickly follow
Sunday night crossing southern Lake Michigan Monday.

LMZ261-362-364-366-563-565-567-868-120900-
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-
845 PM CST Thu Jan 11 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT THROUGH LATE FRIDAY NIGHT...

.REST OF TONIGHT...Northwest gales to 35 kt becoming north.
Chance of snow. Freezing spray. Waves 8 to 11 ft occasionally to
14 ft.
.FRIDAY...North gales to 35 kt. Freezing spray. Slight chance of
snow showers. Waves 8 to 11 ft occasionally to 14 ft.
.FRIDAY NIGHT...North gales to 35 kt diminishing to 30 kt.
Freezing spray. Chance of snow showers. Waves subsiding to 7 to
10 ft occasionally to 13 ft.
.SATURDAY...North winds to 30 kt becoming northwest 15 to 25 kt.
Freezing spray in the morning. Chance of snow showers. Waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt becoming west 10 to
15 kt. Chance of snow showers. Waves 2 to 4 ft subsiding to 1 to
3 ft.
.SUNDAY...Southwest winds 10 to 20 kt increasing to 30 kt in the
afternoon. Chance of snow showers. Waves 1 to 2 ft building to
3 to 5 ft.
.SUNDAY NIGHT...South winds to 30 kt. Snow likely. Waves 5 to
8 ft occasionally to 10 ft.
.MONDAY...Southeast winds 15 to 25 kt becoming northeast 10 to
20 kt. Snow likely. Waves 4 to 7 ft occasionally to 9 ft
subsiding to 3 to 5 ft.
.TUESDAY...Northeast winds to 30 kt becoming north. Chance of
snow. Waves 6 to 9 ft occasionally to 12 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-120900-
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-
845 PM CST Thu Jan 11 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT THROUGH LATE FRIDAY NIGHT...

.REST OF TONIGHT...Northwest winds to 30 kt becoming north gales
to 35 kt. Chance of a wintry mix this evening then a slight
chance of snow overnight. Freezing spray overnight. Waves 6 to 9
ft occasionally to 12 ft building to 10 to 14 ft occasionally to
18 ft.
.FRIDAY...North gales to 35 kt. Freezing spray. Slight chance of
snow showers in the morning...then snow showers likely in the
afternoon. Waves 10 to 14 ft occasionally to 18 ft.
.FRIDAY NIGHT...North gales to 40 kt diminishing to 30 kt.
Freezing spray. Snow showers likely. Waves 10 to 14 ft
occasionally to 18 ft.
.SATURDAY...North winds to 30 kt becoming northwest 15 to 25 kt.
Freezing spray. Chance of snow showers. Waves 8 to 11 ft
occasionally to 14 ft subsiding to 5 to 8 ft occasionally to
10 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt diminishing to
10 to 15 kt. Chance of snow showers. Waves 4 to 6 ft occasionally
to 8 ft subsiding to 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of flurries in the afternoon. Waves 2 to 4 ft building to
3 to 5 ft.
.SUNDAY NIGHT...South winds to 30 kt. Snow. Waves 5 to 8 ft
occasionally to 10 ft.
.MONDAY...Southwest winds 15 to 25 kt becoming northwest. Chance
of snow. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.TUESDAY...North winds to 30 kt. Chance of snow. Waves 6 to 9 ft
occasionally to 12 ft.

$$
LMZ761-120900-
MAFOR 1204/
MICHIGAN NORTH...Gale Warning in effect...11750 11850 15850.
Freezing spray. Chance of snow this evening. Chance of snow
showers Friday evening. Waves 8 to 11 ft occasionally to 14 ft.

MICHIGAN SOUTH...Gale Warning in effect...11740 11850 15850.
Freezing spray. Chance of a wintry mix this evening. Snow
showers likely Friday afternoon and Friday evening. Waves 6 to 9
ft occasionally to 12 ft building to 10 to 14 ft occasionally to
18 ft tonight. Waves 10 to 14 ft occasionally to 18 ft Friday and
Friday evening.

$$

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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