Great Lakes Forecast
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000
FZUS63 KLOT 112047
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
247 PM CST Mon Dec 11 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 297.7 south across central Illinois
will shift into Indiana tonight. This low will deepen to 29.5
inches over the Eastern Great Lakes tonight, and deepen further to
29.0 inches over Maine Tuesday night. High pressure of 30.0
inches will quickly pass over the Western Lakes Wednesday, and a
29.7 inch low will pass over the southern end of the lake or just
south of the lake Wednesday evening. Several weak low will pass
over the lake toward the weekend, with a 29.6 low of note expected
to pass through on Saturday.

LMZ261-362-364-366-563-565-567-868-120430-
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 PM CST Mon Dec 11 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM 8 PM CST THIS EVENING THROUGH
TUESDAY AFTERNOON...

.TONIGHT...Northwest winds 15 to 25 kt quickly increasing to
northwest gales to 40 kt this evening, before shifting north
overnight. Chance of snow. Freezing spray overnight. Waves 4 to 7
ft occasionally to 9 ft building to 10 to 14 ft occasionally to
18 ft.
.TUESDAY...North gales to 40 kt. Freezing spray. Chance of snow
showers. Waves 10 to 14 ft occasionally to 18 ft subsiding to
8 to 11 ft occasionally to 14 ft.
.TUESDAY NIGHT...North winds to 30 kt diminishing to 10 to 20 kt
overnight. Chance of snow. Waves 7 to 10 ft occasionally to 13 ft
subsiding to 3 to 5 ft.
.WEDNESDAY...Northwest winds 10 to 15 kt. Chance of snow in the
afternoon. Waves 2 to 4 ft subsiding to 1 to 2 ft in the
afternoon.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 kt. Chance of snow.
Waves 1 to 3 ft.
.THURSDAY...North winds 10 to 20 kt becoming northwest 10 to
15 kt. Chance of snow. Waves 1 to 3 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt. Chance of snow. Waves
2 to 4 ft.
.FRIDAY...Northwest winds 15 to 25 kt. Chance of snow. Waves 3 to
5 ft.
.SATURDAY...Northwest winds 10 to 20 kt veering to east 15 to
25 kt. Chance of snow. Waves 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-120430-
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 PM CST Mon Dec 11 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT FROM 8 PM CST THIS EVENING THROUGH
TUESDAY EVENING...

.TONIGHT...Northwest gales to 35 kt increasing to gales to 40 kt
from late evening on. Chance of snow and slight chance of rain
this evening...then snow overnight. Freezing spray overnight.
Waves 4 to 6 ft occasionally to 8 ft building to 14 to 18 ft
occasionally to 23 ft.
.TUESDAY...Northwest gales to 40 kt. Freezing spray. Snow
showers. Waves 14 to 18 ft occasionally to 23 ft subsiding to
10 to 14 ft occasionally to 18 ft late.
.TUESDAY NIGHT...Northwest winds to 30 kt diminishing to 10 to
20 kt late. Chance of snow. Waves 8 to 12 ft occasionally to
16 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.WEDNESDAY...West winds 10 to 15 kt backing to southwest. Chance
of flurries in the morning...then chance of snow in the
afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft in the afternoon.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 kt backing to
northeast 15 to 25 kt. Chance of snow. Waves 1 to 3 ft.
.THURSDAY...North winds 10 to 20 kt becoming northwest 10 to
15 kt. Chance of snow. Waves 2 to 4 ft.
.THURSDAY NIGHT...West winds 15 to 25 kt. Chance of snow. Waves
1 to 3 ft building to 3 to 5 ft overnight.
.FRIDAY...West winds to 30 kt. Chance of snow. Waves 4 to 7 ft
occasionally to 9 ft.
.SATURDAY...Southwest winds 15 to 25 kt. Chance of snow and rain.
Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ761-120430-
MAFOR 1122/
MICHIGAN NORTH...Gale Warning in effect...11730 12750 11860
14850. Chance of snow tonight. Chance of snow showers Tuesday.
Waves 3 to 5 ft occasionally to 7 ft building to 10 to 14 ft
occasionally to 18 ft tonight. Waves 10 to 14 ft occasionally to
18 ft subsiding to 8 to 12 ft occasionally to 15 ft Tuesday.

MICHIGAN SOUTH...Gale Warning in effect...11537 12757 11760 11767
14757. Chance of rain or snow this evening. Waves 3 to 5 ft
occasionally to 7 ft building to 14 to 18 ft occasionally to 24 ft
tonight. Waves 14 to 18 ft occasionally to 24 ft subsiding to 12
to 16 ft occasionally to 20 ft Tuesday.

$$


KMD

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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