Great Lakes Forecast
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000
FZUS63 KLOT 180838
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
238 AM 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 30.7 inches is centered over the
lower Mississippi Valley this morning and will remain over the
Deep South into the weekend. Meanwhile, low pressure of 29.6
inches is over southern Manitoba early this morning and will move
east across Ontario and fill today. 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/southern
Great Plains early Sunday to Lake Michigan Monday deepening to
29.3 inches.

LMZ261-362-364-366-563-565-567-868-181645-
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-
238 AM CST Thu Jan 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

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

.TODAY...West winds to 30 kt early becoming southwest 15 to 25
kt...then increasing to 30 kt in the afternoon. Slight chance of
snow showers this afternoon. Waves 5 to 8 ft occasionally to 10
ft.
.TONIGHT...West winds 15 to 25 kt becoming southwest 10 to 20 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.FRIDAY...Southwest winds 15 to 25 kt increasing to gales to
35 kt. Waves 2 to 4 ft building to 6 to 9 ft occasionally to
12 ft.
.FRIDAY NIGHT...Southwest gales to 40 kt diminishing to 30 kt
late. Waves 8 to 11 ft occasionally to 14 ft subsiding to 7 to 10
ft occasionally to 13 ft.
.SATURDAY...West winds 15 to 25 kt diminishing to 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 becoming south.
Waves 1 to 3 ft.
.SUNDAY...Southeast winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of rain and snow. Waves 1 to 3 ft.
.MONDAY...Southeast winds to 30 kt. Rain likely with snow. Waves
4 to 7 ft occasionally to 9 ft building to 5 to 8 ft occasionally
to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-181645-
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-
238 AM CST Thu Jan 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

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

.TODAY...Southwest winds to 30 kt. Freezing spray this morning.
Waves 6 to 9 ft occasionally to 12 ft.
.TONIGHT...Southwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.FRIDAY...Southwest winds to 30 kt increasing to gales to 35 kt.
Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft
occasionally to 10 ft.
.FRIDAY NIGHT...Southwest gales to 35 kt diminishing to 30 kt
late. Waves 7 to 10 ft occasionally to 13 ft.
.SATURDAY...Southwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt becoming south.
Areas of fog. Chance of drizzle. Waves 1 to 3 ft.
.SUNDAY...South winds 10 to 20 kt. Areas of fog. Chance of rain.
Waves 1 to 3 ft.
.MONDAY...South winds to 30 kt. Rain likely. Waves 4 to 7 ft
occasionally to 9 ft building to 5 to 8 ft occasionally to 10 ft.


$$

LMZ761-181645-
MAFOR 1810/
MICHIGAN NORTH 11640 12530 12540 13630. Waves 5 to 8 ft
occasionally to 10 ft today. Waves 4 to 7 ft occasionally to 9
ft subsiding to 3 to 5 ft tonight.

MICHIGAN SOUTH 15540 11540 11530. Freezing spray this morning.
Waves 6 to 9 ft occasionally to 12 ft today. Waves 6 to 9 ft
occasionally to 12 ft subsiding to 4 to 7 ft occasionally to 9 ft
tonight.

$$

BMD

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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