Great Lakes Forecast
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000
FZUS63 KLOT 111457
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
857 AM 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 29.6 inches moving east across the
U.P. of Michigan will move to northern Lake Huron tonight and to
western Quebec by daybreak Friday. An associated sharp cold front
trailing from this low will move across Lake Michigan this
afternoon and evening. High pressure of 30.8 inches will build
from the plains into the Upper Midwest Friday into Saturday while
low pressure of 29.4 inches shifts through the Appalachian
states. The high will move into the Great Lakes region on Sunday.
A clipper like low at 30.1 inches will quickly follow Sunday night
into Monday.

LMZ261-362-364-366-563-565-567-868-112230-
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-
857 AM CST Thu Jan 11 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL NOON CST TODAY...
...GALE WARNING IN EFFECT FROM 6 PM CST THIS EVENING THROUGH LATE
FRIDAY NIGHT...

.REST OF TODAY...South winds to 30 kt veering to west. Areas of
fog...locally dense this morning. Periods of rain... a chance of
light freezing rain toward evening. Waves 5 to 8 ft occasionally
to 10 ft.
.TONIGHT...Northwest gales to 35 kt becoming north. Freezing
spray. Snow likely with pockets of sleet, rain and freezing rain
in the evening...then chance of snow overnight. Waves 8 to 11 ft
occasionally to 14 ft.
.FRIDAY...North gales to 35 kt. Freezing spray. Waves 8 to 12 ft
occasionally to 16 ft.
.FRIDAY NIGHT...North gales to 35 kt diminishing to 30 kt by
daybreak. Freezing spray. Chance of snow showers. Waves 8 to 11
ft occasionally to 14 ft.
.SATURDAY...North winds to 30 kt diminishing to 15 to 25 kt.
Freezing spray. Chance of snow showers in the afternoon. Waves
6 to 9 ft occasionally to 12 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt diminishing to
10 to 15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to
2 to 4 ft.
.SUNDAY...West winds 10 to 20 kt becoming southwest 15 to 25 kt.
Waves 2 to 4 ft.
.MONDAY...South winds 10 to 20 kt backing to northeast 15 to
25 kt. Snow likely. Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-112230-
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-
857 AM CST Thu Jan 11 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY EXPIRED...
...GALE WARNING IN EFFECT FROM 6 PM CST THIS EVENING THROUGH LATE
FRIDAY NIGHT...

.REST OF TODAY...South winds to 30 kt becoming southwest. Areas
of fog. Periods of rain. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 4 to 7 ft occasionally to 9 ft.
.TONIGHT...Northwest winds to 30 kt increasing to gales to 35 kt
and becoming north. Periods of rain with possible freezing rain,
snow and sleet likely in the evening...then chance of snow
overnight. Freezing spray overnight. Waves 7 to 10 ft occasionally
to 13 ft building to 10 to 14 ft occasionally to 18 ft.
.FRIDAY...North gales to 35 kt. Freezing spray. Chance of snow
showers in the afternoon. Waves 10 to 14 ft occasionally to
18 ft.
.FRIDAY NIGHT...North gales to 35 kt. Freezing spray. Chance of
snow showers. Waves 10 to 14 ft occasionally to 18 ft.
.SATURDAY...North winds to 30 kt diminishing to 15 to 25 kt.
Freezing spray. Chance of snow showers. Waves 8 to 11 ft
occasionally to 14 ft subsiding to 7 to 10 ft occasionally to
13 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt becoming northwest
10 to 15 kt. Freezing spray. Chance of snow showers. Waves 5 to
8 ft occasionally to 10 ft subsiding to 3 to 5 ft.
.SUNDAY...West winds 10 to 15 kt becoming southwest 15 to 25 kt
in the afternoon. Waves 2 to 4 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming west. Snow likely.
Waves 4 to 6 ft occasionally to 8 ft.

$$
LMZ761-112230-
MAFOR 1116/
MICHIGAN NORTH...Gale Warning in effect...12546 11756 11757 11857
13850. Chance of light freezing rain this afternoon. Chance of
snow after midnight tonight. Waves 6 to 9 feet occasionally to 12
feet today. Waves 7 to 10 feet occasionally to 13 feet building
to 8 to 11 feet occasionally to 14 feet tonight. Waves 8 to 12
feet occasionally to 16 feet Friday morning.

MICHIGAN SOUTH...Gale Warning in effect...12446 19444 11646 11746
11750 13850. Chance of snow and light sleet in the evening,...
Then chance of snow after midnight tonight. Waves 6 to 9 feet
occasionally to 12 feet today. Waves 5 to 8 feet occasionally to
10 feet building to 10 to 14 feet occasionally to 18 feet
tonight. Waves 10 to 14 feet occasionally to 18 feet Friday
morning.

$$

Ed F

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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