Great Lakes Forecast
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000
FZUS63 KLOT 172026
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
226 PM CST Sun Dec 17 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...High pressure of 30.4 inches over southeast Ontario
will move east off into the northwestern Atlantic by Monday
morning. Meanwhile, low pressure of 29.2 inches over Northwest
Territories will deepen slightly to 29.0 inches as it moves to
Hudson Bay Monday night, then continues east to Quebec Tuesday. A
cold front trailing southwest from this low will move across the
lake Tuesday morning. High pressure of 30.3 inches over the
Northern Plains Tuesday afternoon will move east into the western
Great Lakes Wednesday. New low pressure of 29.6 inches will
develop over the central and southern High Plains Wednesday night
with a warm front developing northeast from that low toward Lake
Michigan. This low will cross lake Michigan Friday as a deepening
29.3 inch low.

LMZ261-362-364-366-563-565-180415-
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-
226 PM CST Sun Dec 17 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

...GALE WATCH IN EFFECT FROM MONDAY EVENING THROUGH LATE MONDAY
NIGHT...

.TONIGHT...Southeast winds 10 to 15 kt veering to west. Slight
chance of snow this evening...then slight chance of rain and snow
overnight. Waves 1 to 3 ft.
.MONDAY...Southwest winds to 30 kt. Waves 2 to 4 ft building to 5
to 8 ft occasionally to 10 ft.
.MONDAY NIGHT...Southwest winds to 30 kt. A few gale force gusts
to 35 kt. Chance of rain and snow. Waves 7 to 10 ft occasionally
to 13 ft.
.TUESDAY...West winds to 30 kt. Waves 6 to 9 ft occasionally to
12 ft.
.TUESDAY NIGHT...Northwest winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt diminishing to 10 to
15 kt in the afternoon. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 1 to 3 ft in the afternoon.
.WEDNESDAY NIGHT...North winds 10 to 15 kt becoming east 10 to
20 kt. Chance of snow. Waves 1 to 3 ft.
.THURSDAY...Southeast winds 10 to 20 kt. Chance of snow and rain
likely. Waves 2 to 4 ft.
.FRIDAY...East winds 15 to 25 kt. Snow and rain. Waves 3 to 5 ft
building to 4 to 6 ft occasionally to 8 ft in the afternoon.

$$

LMZ080-567-669-671-673-675-777-779-868-870-872-874-876-878-180415-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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 Pentwater to Manistee MI 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-
226 PM CST Sun Dec 17 2017

TWO RIVERS WI TO MANISTEE MI SOUTH...

.TONIGHT...Southeast winds 10 to 20 kt becoming west 10 to 15 kt.
Chance of rain. Waves 1 to 3 ft.
.MONDAY...West winds 10 to 15 kt becoming southwest to 30 kt from
late morning on. Slight chance of rain in the morning. Waves 1 to
3 ft building to 4 to 6 ft occasionally to 8 ft.
.MONDAY NIGHT...Southwest winds to 30 kt. Waves 7 to 10 ft
occasionally to 13 ft.
.TUESDAY...West winds to 30 kt. Waves 6 to 9 ft occasionally to
12 ft.
.TUESDAY NIGHT...Northwest winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.
.WEDNESDAY...North winds 15 to 25 kt diminishing to 10 to 15 kt
in the afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding
to 3 to 5 ft in the afternoon.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt becoming southeast
10 to 20 kt. Chance of snow. Waves 2 to 4 ft.
.THURSDAY...Southeast winds 15 to 25 kt. Chance of rain and snow.
Waves 2 to 4 ft.
.FRIDAY...South winds 10 to 20 kt becoming southwest 15 to 25 kt.
Rain and snow likely. Waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft in the afternoon.

$$

LMZ761-180415-
MAFOR 1722/
MICHIGAN NORTH 11310 11410 11510 12610 11520 12540. Waves 1 to 3
ft tonight. Waves 2 to 4 ft building to 5 to 8 ft occasionally to
10 ft Monday.

MICHIGAN SOUTH 11320 11520 13610 11620 12530. Chance of rain
after midnight tonight. Waves 1 to 3 ft building to 4 to 6 ft
occasionally to 8 ft late Monday.

$$

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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