Great Lakes Forecast
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000
FZUS63 KLOT 120847
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
247 AM CST Fri Jan 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...Low pressure of 29.4 inches is over northern Quebec
early this morning with a trailing cold front stretching across
the central Great Lakes region. High pressure of 30.4 inches
stretches from Alberta into the Dakotas. The cold front will move
to the East Coast today while the high consolidates over the
Dakotas and strengthens to 30.9 inches. The high will move to the
Ohio Valley Saturday night then to the eastern Great Lakes and
Quebec on Sunday. A 30.2 inch low will form over Minnesota Sunday
and will move across Lake Michigan Monday. Another high of 31.1
inches will build into the northern Great Plains Monday then shift
to the mid Mississippi Valley Wednesday weakening slightly to
30.7 inches.

LMZ261-362-364-366-563-565-567-868-121645-
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-
247 AM CST Fri Jan 12 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TODAY...North gales to 35 kt. Freezing spray. Chance of snow
this morning...then slight chance of snow this afternoon. Waves 10
to 14 ft occasionally to 18 ft.
.TONIGHT...North gales to 35 kt diminishing to 30 kt late.
Freezing spray. Chance of flurries. Waves 8 to 11 ft occasionally
to 14 ft subsiding to 7 to 10 ft occasionally to 13 ft.
.SATURDAY...North winds to 30 kt becoming northwest 10 to 20 kt.
Freezing spray in the morning. Chance of flurries in the
afternoon. Waves 5 to 8 ft occasionally to 10 ft subsiding to
3 to 5 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt becoming west 10 to
15 kt. Chance of flurries overnight. Waves 2 to 4 ft subsiding to
1 to 2 ft.
.SUNDAY...Southwest winds 10 to 20 kt increasing to 30 kt in the
afternoon. Chance of flurries. Waves 1 to 3 ft building to 4 to
6 ft occasionally to 8 ft.
.SUNDAY NIGHT...South winds to 30 kt. Snow likely. Waves 5 to
8 ft occasionally to 10 ft.
.MONDAY...South winds 15 to 25 kt backing to east 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 5 to 8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-121645-
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-
247 AM CST Fri Jan 12 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TODAY...North gales to 40 kt. Freezing spray. Chance of snow.
Waves 12 to 16 ft occasionally to 21 ft.
.TONIGHT...North gales to 35 kt diminishing to 30 kt late.
Freezing spray. Chance of snow. Waves 10 to 14 ft occasionally to
18 ft subsiding to 8 to 12 ft occasionally to 16 ft.
.SATURDAY...North winds to 30 kt becoming northwest 10 to 20 kt.
Freezing spray. Snow likely in the morning...then chance of snow
in the afternoon. Waves 8 to 11 ft occasionally to 14 ft
subsiding to 4 to 7 ft occasionally to 9 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt becoming west 10 to
15 kt. Chance of snow in the evening...then chance of flurries
overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 20 kt becoming south to 30 kt in
the afternoon. Chance of flurries. Waves 1 to 3 ft building to
3 to 5 ft.
.SUNDAY NIGHT...South winds to 30 kt. Freezing spray. Snow. Waves
5 to 8 ft occasionally to 10 ft.
.MONDAY...Southwest winds to 30 kt becoming northwest. Chance of
snow. Waves 4 to 7 ft occasionally to 9 ft.
.TUESDAY...Northwest winds to 30 kt becoming north. Chance of
snow. Waves 5 to 8 ft occasionally to 10 ft.

$$

LMZ761-121645-
MAFOR 1210/
MICHIGAN NORTH...Gale Warning in effect...16850. Freezing spray.
Chance of snow this morning. Waves 10 to 14 feet occasionally to
18 feet today. Waves 8 to 11 feet occasionally to 14 feet
subsiding to 7 to 10 feet occasionally to 13 feet tonight.

MICHIGAN SOUTH...Gale Warning in effect...16850. Freezing spray.
Chance of snow. Waves 12 to 16 feet occasionally to 21 feet today.
Waves 10 to 14 feet occasionally to 18 feet subsiding to 8 to 12
feet occasionally to 16 feet 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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