Great Lakes Forecast
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FZUS63 KLOT 220838
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
238 AM CST Thu Feb 22 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...High pressure of 30.6 inches is centered over Lake
Superior early this morning and will move to Maine late tonight. A
low of 30.1 inches will lift from the mid Mississippi Valley early
Friday across the western Great Lakes Friday afternoon. High
pressure of 30.5 inches will build across the Dakotas Friday and
move to Quebec Saturday. Low pressure of 29.5 inches will develop
over the Central Plains Friday night and lift across Lake Superior
Sunday at 29.0 inches. A 30.2 inch inch will build over the
Central Plains Monday and move to the upper Ohio Valley Tuesday.

LMZ261-362-364-366-563-565-567-868-221645-
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-
238 AM CST Thu Feb 22 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...East winds 10 to 15 kt. Waves 1 to 3 ft.
.TONIGHT...Southeast winds 10 to 20 kt increasing to 15 to 25 kt.
Slight chance of a wintry mix in the evening...a wintry mix
overnight. Waves 2 to 4 ft building to 4 to 7 ft occasionally to
9 ft.
.FRIDAY...South winds 15 to 25 kt veering to west. Snow and light
sleet with rain likely in the morning. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 3 to 5 ft.
.FRIDAY NIGHT...West winds 15 to 25 kt becoming north 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.SATURDAY...East winds 10 to 15 kt increasing to 15 to 25 kt in
the afternoon. Waves 1 to 3 ft.
.SATURDAY NIGHT...East winds to 30 kt becoming southeast gales to
40 kt overnight. Rain and snow. Waves 4 to 6 ft occasionally to
8 ft building to 5 to 8 ft occasionally to 10 ft.
.SUNDAY...Southwest gales to 40 kt becoming west. Waves 7 to
10 ft occasionally to 13 ft.
.MONDAY...West winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of rain and snow. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-221645-
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-
238 AM CST Thu Feb 22 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northeast winds 10 to 20 kt becoming east. Waves 2 to
4 ft.
.TONIGHT...Southeast winds 15 to 25 kt increasing to 30 kt.
Slight chance of rain...then rain likely with slight chance of
light freezing rain overnight. Waves 3 to 5 ft building to 4 to 7
ft occasionally to 9 ft.
.FRIDAY...South winds 15 to 25 kt veering to west 10 to 20 kt.
Chance of rain and light freezing rain in the morning. Waves 4 to
6 ft occasionally to 8 ft subsiding to 3 to 5 ft.
.FRIDAY NIGHT...Northwest winds 10 to 20 kt becoming north. Waves
3 to 5 ft.
.SATURDAY...East winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of snow and rain. Waves 2 to 4 ft.
.SATURDAY NIGHT...Southeast winds to 30 kt becoming south gales
to 40 kt overnight. Rain likely. Waves 4 to 6 ft occasionally to
8 ft building to 6 to 9 ft occasionally to 12 ft.
.SUNDAY...West gales to 40 kt. Waves 7 to 10 ft occasionally to
13 ft.
.MONDAY...West winds 15 to 25 kt becoming southwest 10 to 20 kt.
Waves 3 to 5 ft subsiding to 2 to 4 ft.

$$

LMZ761-221645-
MAFOR 2210/
MICHIGAN NORTH 14210 11210 11320 12327. Waves 1 to 3 ft today.
Waves 2 to 4 ft building to 4 to 7 ft occasionally to 9 ft
tonight.

MICHIGAN SOUTH 13120 12220 11330 12346. Waves 2 to 4 ft today.
Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft
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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