Great Lakes Forecast
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000
FZUS63 KLOT 082013
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
213 PM CST Fri Dec 8 2017

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 will move through southern
Quebec tonight while another low pressure of 29.7 inches over
southwestern Ontario across the center of Lake Michigan late
tonight while deepening 29.6 inches. The low will then lift
through the eastern Great Lakes Saturday afternoon and evening. A
weak ridge of high pressure averaging 30.0 inches will move across
the lake Saturday night. Another weak low pressure is expected to
form near Lake Superior Sunday morning and move to New England
Monday morning as yet another low forms over the upper midwest
Sunday and moves across the Great Lakes Monday.

LMZ261-362-364-563-090415-
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 Rock Island Passage to Sturgeon Bay WI-
213 PM CST Fri Dec 8 2017

STURGEON BAY WI TO POINT BETSIE MI NORTH...

.TONIGHT...West winds 10 to 20 kt becoming northwest late this
evening...then becoming north after midnight becoming northeast
to 30 kt late. Snow this evening...then chance of snow overnight.
Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...North winds to 30 kt. Chance of snow in the morning...
then slight chance of snow in the afternoon. Waves 6 to 9 ft
occasionally to 12 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt becoming west.
Chance of snow overnight. Waves 4 to 7 ft occasionally to 9 ft
subsiding to 3 to 5 ft.
.SUNDAY...West winds 10 to 20 kt becoming northwest. Chance of
snow in the morning. Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...Northwest winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of snow. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.MONDAY...South winds 10 to 15 kt backing to northeast 10 to
20 kt. Snow likely in the morning...then chance of snow in the
afternoon. Waves 1 to 2 ft building to 2 to 4 ft.
.MONDAY NIGHT...North winds 15 to 25 kt increasing to 30 kt.
Chance of snow. Waves 4 to 7 ft occasionally to 9 ft building to
7 to 10 ft occasionally to 13 ft.
.TUESDAY...North winds to 30 kt. Chance of snow. Waves 7 to 10 ft
occasionally to 13 ft subsiding to 6 to 9 ft occasionally to
12 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt becoming west. Chance of
snow. Waves 2 to 4 ft.

$$

LMZ366-565-567-669-868-870-090415-
Lake Michigan from Point Betsie to Manistee MI 5 NM offshore to
Mid Lake-
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 Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
213 PM CST Fri Dec 8 2017

STURGEON BAY WI TO POINT BETSIE MI SOUTH TO PORT WASHINGTON WI TO
WHITEHALL MI...

...GALE WARNING IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY
AFTERNOON...

.TONIGHT...West winds 10 to 20 kt becoming northwest after
midnight...then becoming north to 30 kt late. Snow. Waves 3 to
5 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...North gales to 35 kt. Snow likely in the morning...
then chance of snow in the afternoon. Waves 6 to 9 ft
occasionally to 12 ft building to 8 to 12 ft occasionally to
16 ft.
.SATURDAY NIGHT...Northwest winds to 30 kt diminishing to 15 to
25 kt late in the evening...then becoming west 10 to 20 kt
overnight. Waves 8 to 11 ft occasionally to 14 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.SUNDAY...West winds 15 to 25 kt becoming northwest 10 to 20 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...Northwest winds 10 to 20 kt. Chance of snow
overnight. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.MONDAY...Southwest winds 10 to 20 kt veering to north. Chance of
snow in the morning...then snow likely in the afternoon. Waves
1 to 3 ft building to 2 to 4 ft.
.MONDAY NIGHT...North winds to 30 kt increasing to gales to
35 kt. Freezing spray. Snow likely. Waves 5 to 8 ft occasionally
to 10 ft building to 8 to 12 ft occasionally to 16 ft.
.TUESDAY...Northwest gales to 35 kt diminishing to 30 kt. Chance
of snow. Waves 8 to 12 ft occasionally to 16 ft.
.WEDNESDAY...West winds 10 to 20 kt. Chance of snow. Waves 3 to
5 ft subsiding to 2 to 4 ft.

$$

LMZ080-671-673-675-777-779-872-874-876-878-090415-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
213 PM CST Fri Dec 8 2017

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

...GALE WARNING IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY
EVENING...

.TONIGHT...Southwest winds to 30 kt becoming northwest. Snow
likely this evening...then snow overnight. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.SATURDAY...Northwest gales to 35 kt becoming north gales to
40 kt. Snow likely in the morning...then chance of snow in the
afternoon. Waves 6 to 9 ft occasionally to 12 ft building to
12 to 16 ft occasionally to 21 ft.
.SATURDAY NIGHT...Northwest gales to 35 kt diminishing to 15 to
25 kt late in the evening...then becoming west 10 to 20 kt
overnight. Chance of snow in the evening. Waves 10 to 14 ft
occasionally to 18 ft subsiding to 6 to 9 ft occasionally to 12
ft.
.SUNDAY...West winds to 30 kt diminishing to 15 to 25 kt. Chance
of snow in the afternoon. Waves 4 to 7 ft occasionally to 9 ft.
.SUNDAY NIGHT...Northwest winds 10 to 20 kt becoming west. Chance
of snow. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.MONDAY...Southwest winds 10 to 20 kt becoming west 15 to 25 kt.
Chance of snow in the morning...then chance of snow and rain in
the afternoon. Waves 1 to 3 ft building to 3 to 5 ft.
.MONDAY NIGHT...Northwest winds to 30 kt increasing to gales to
35 kt. Snow likely. Waves 6 to 9 ft occasionally to 12 ft
building to 10 to 14 ft occasionally to 18 ft.
.TUESDAY...Northwest gales to 35 kt. Snow likely. Waves 10 to
14 ft occasionally to 18 ft.
.WEDNESDAY...West winds 10 to 20 kt. Chance of snow. Waves 4 to
6 ft occasionally to 8 ft subsiding to 3 to 5 ft.

$$

LMZ761-090415-
MAFOR 0822/
MICHIGAN NORTH...Gale Warning in effect...12627 11727 11837 11847
13850. Chance of snow showers early this evening. Chance of snow
Saturday morning. Waves 3 to 5 feet building to 4 to 6 feet
occasionally to 8 feet tonight. Waves 8 to 11 feet occasionally to
14 feet building to 8 to 12 feet occasionally to 16 feet
Saturday.

MICHIGAN SOUTH...Gale Warning in effect...11630 11640 12637 11747
11757 11857 11850. Chance of snow early Saturday afternoon. Waves
5 to 8 feet occasionally to 10 feet subsiding to 4 to 7 feet
occasionally to 9 feet tonight. Waves 7 to 10 feet occasionally to
13 feet building to 12 to 16 feet occasionally to 21 feet
Saturday.

$$

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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