Great Lakes Forecast
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000
FZUS63 KLOT 190252
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
852 PM CST Thu Jan 18 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...High pressure of 30.6 inches over the Deep South will
remain in place into the start of the weekend. Low pressure of
29.7 inches over Ontario and Lake Superior will will drift east
while weakening tonight. Another low of 29.3 inches will move
from Alberta this evening to James Bay Friday night. Yet another
low of 29.6 inches will move from the central and southern Great
Plains early Sunday to Lake Michigan Monday evening while
deepening to 29.4 inches. The low will move to or north of the
eastern lakes on Tuesday.

LMZ261-362-364-366-563-565-567-868-191030-
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-
852 PM CST Thu Jan 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

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

.REST OF TONIGHT...West winds 20 to 25 kt becoming southwest 15
to 25 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.FRIDAY...Southwest winds 15 to 25 kt increasing to gales to
35 kt. Waves building to 8 to 11 ft occasionally to 14 ft.
.FRIDAY NIGHT...Southwest gales to 40 kt becoming west 15 to
25 kt. Waves 8 to 12 ft occasionally to 16 ft subsiding to 5 to
8 ft occasionally to 10 ft.
.SATURDAY...Southwest winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.
.SATURDAY NIGHT...Southwest winds 10 to 15 kt backing to
southeast. Waves 1 to 3 ft.
.SUNDAY...East winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of rain and snow in the afternoon. Waves 1 to 3 ft
building to 2 to 4 ft.
.SUNDAY NIGHT...East winds to 30 kt. Rain likely with snow. Waves
4 to 6 ft occasionally to 8 ft.
.MONDAY...Southeast winds to 30 kt. Rain likely. Waves 5 to 8 ft
occasionally to 10 ft.
.TUESDAY...Northwest winds to 30 kt. Chance of snow. Waves 5 to
8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-191030-
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-
852 PM CST Thu Jan 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

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

.REST OF TONIGHT...Southwest winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.
.FRIDAY...Southwest winds to 30 kt increasing to gales to 35 kt.
Waves building to 7 to 10 ft occasionally to 13 ft.
.FRIDAY NIGHT...Southwest gales to 40 kt diminishing to 30 kt.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.SATURDAY...Southwest winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt diminishing to
10 to 15 kt. Patchy fog in the evening...then areas of fog
overnight. Chance of drizzle overnight. Waves 2 to 4 ft subsiding
to 1 to 3 ft.
.SUNDAY...South winds 10 to 15 kt becoming southeast 10 to 20 kt.
Areas of fog. Chance of rain and light freezing rain in the
morning...then chance of rain in the afternoon. Waves 1 to 3 ft.
.SUNDAY NIGHT...Southeast winds 15 to 25 kt increasing to 30 kt.
Patchy fog. Rain likely. Waves 2 to 4 ft building to 3 to 5 ft.
.MONDAY...Southeast winds to 30 kt becoming south. Rain likely.
Waves 5 to 8 ft occasionally to 10 ft.
.TUESDAY...West gales to 35 kt. Chance of snow. Waves 6 to 9 ft
occasionally to 12 ft.

$$
LMZ761-191030-
MAFOR 1904/
MICHIGAN NORTH...Gale Warning in effect...11630 12530 12540
13550. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 6
ft occasionally to 8 ft overnight, then building to 8 to 11 ft
occasionally to 14 ft Friday and to 8 to 12 ft occasionally to 16
ft Friday evening.

MICHIGAN SOUTH...Gale Warning in effect...12540 13540 13550.
Waves 6 to 9 ft occasionally to 12 ft overnight building to 7 to
10 ft occasionally to 13 ft Friday and to 8 to 11 ft occasionally
to 14 ft Friday evening.

$$

RC

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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