Great Lakes Forecast
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000
FZUS63 KLOT 260138
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
838 PM CDT Mon Sep 25 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 29.9 inches over Wisconsin will move
to Lake Superior on Tuesday...trailing a cold front across the
lake late Tuesday afternoon and evening. The low will then deepen
to 29.6 inches as it pulls away into western Quebec by early
Wednesday. High pressure of 30.2 inches will spread slowly east
from the Great Plains Wednesday...with weaker ridging of 30.1
inches extending across southern Lake Michigan by early Thursday.
Low pressure of 29.9 inches will pass just northeast of the Great
Lakes by early Friday...with another cold front pushing across
the lake. High pressure of 30.4 inches will build across the
western Lakes Saturday.

LMZ261-362-364-366-563-565-567-868-260945-
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-
838 PM CDT Mon Sep 25 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...South winds around 10 kt becoming southeast.
Waves 1 to 2 ft.
.TUESDAY...South winds 10 to 15 kt becoming southwest 10 to 20 kt.
Chance of showers and thunderstorms in the afternoon. Waves 1 to
3 ft building to 2 to 4 ft.
.TUESDAY NIGHT...Southwest winds 10 to 20 kt becoming northwest
15 to 25 kt. Chance of showers in the evening. Waves 2 to 4 ft
building to 3 to 5 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt. Waves 3 to 5 ft.
.WEDNESDAY NIGHT...Northwest winds 10 to 20 kt. Waves subsiding to
2 to 4 ft.
.THURSDAY...West winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers in the afternoon. Waves 2 to 4 ft.
.THURSDAY NIGHT...Northwest winds 10 to 20 kt increasing to 30 kt
overnight. Chance of showers. Waves 3 to 5 ft building to 4 to
6 ft occasionally to 8 ft.
.FRIDAY...North winds to 30 kt. Chance of showers. Waves 6 to
9 ft occasionally to 12 ft building to 7 to 10 ft occasionally to
13 ft.
.SATURDAY...Northeast winds 10 to 15 kt veering to east 5 to
10 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-260945-
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-
838 PM CDT Mon Sep 25 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Southeast winds around 10 kt becoming south.
Waves 1 to 2 ft.
.TUESDAY...South winds 10 to 15 kt increasing to 10 to 20 kt
becoming southwest late. Slight chance of showers and
thunderstorms in the afternoon. Waves 1 to 3 ft.
.TUESDAY NIGHT...West winds 10 to 20 kt becoming northwest 15 to
25 kt. Waves 1 to 3 ft building to 4 to 6 ft occasionally to
8 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt becoming north. Waves
4 to 6 ft occasionally to 8 ft.
.WEDNESDAY NIGHT...North winds 10 to 20 kt. Waves 3 to 5 ft.
.THURSDAY...Northwest winds 10 to 15 kt becoming west 10 to
20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...West winds 15 to 25 kt becoming northwest to
30 kt. Waves 2 to 4 ft building to 4 to 6 ft occasionally to
8 ft.
.FRIDAY...Northwest winds to 30 kt becoming north. Waves 7 to
10 ft occasionally to 13 ft.
.SATURDAY...Northeast winds 10 to 20 kt diminishing to 5 to 10 kt
in the afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding
to 3 to 5 ft.

$$
LMZ761-260945-
MAFOR 2603/
MICHIGAN NORTH 11400 12300 11410 11420 13520. Chance of showers
and thunderstorms Tuesday and Tuesday afternoon and evening.
Waves 1 to 2 feet tonight building to 2 to 4 ft Tuesday and
continuing Tuesday evening.

MICHIGAN SOUTH 11300 12400 12410 11420 11520 11620. Waves 1 to 3
feet.

$$

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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