Great Lakes Forecast
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000
FZUS63 KLOT 210131
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
831 PM CDT Fri Apr 20 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 over the cetral Great
Lakes will drift slowly east across southwestern Ontario and the
eastern Lakes through the weekend, while weaker ridging of 30.4
inches lingers across the Upper Mississippi Valley. Two areas of
low pressure will pass well to the north and well to the south of
the Lake, as this ridge axis remains in place across the western
Lakes into Monday. The ridge will finally move east of the area
Tuesday, allowing a cold front to push southeast across the lake
Tuesday night.

LMZ261-362-364-366-563-565-567-868-210930-
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-
831 PM CDT Fri Apr 20 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Southwest winds 10 to 15 kt. Waves 1 to 2 ft.
.SATURDAY...South winds 5 to 10 kt. Waves 1 to 2 ft.
.SATURDAY NIGHT...South winds 5 to 10 kt becoming east. Waves
1 to 2 ft.
.SUNDAY...East winds 5 to 10 kt becoming northeast. Waves 1 ft or
less.
.SUNDAY NIGHT...East winds 5 to 10 kt becoming southeast. Waves
1 to 2 ft.
.MONDAY...South winds 5 to 10 kt becoming southwest. Waves 1 ft
or less.
.MONDAY NIGHT...South winds 5 to 10 kt becoming southwest. Waves
1 ft or less.
.TUESDAY...Southwest winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 3 ft.
.WEDNESDAY...North winds 15 to 25 kt. Waves 4 to 7 ft
occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-210930-
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-
831 PM CDT Fri Apr 20 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...East winds 10 to 15 kt becoming southeast.
Waves around 1 ft.
.SATURDAY...East winds less than 10 kt becoming northeast. Waves
around 1 ft.
.SATURDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 ft or less.
.SUNDAY...East winds 5 to 10 kt becoming northeast. Waves 1 to
2 ft.
.SUNDAY NIGHT...Northeast winds 10 to 15 kt becoming east. Waves
1 to 3 ft.
.MONDAY...East winds 10 to 15 kt becoming north. Waves 1 to 3 ft.
.MONDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 to 2 ft.
.TUESDAY...South winds 5 to 10 kt. Waves around 1 ft.
.WEDNESDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of rain. Waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft.

$$
LMZ761-210930-
MAFOR 2103/
MICHIGAN NORTH 11510 11410 11510 12400 11500 12400. Waves 1 to 2
ft.

MICHIGAN SOUTH 11210 11200 12300 12200 12100. Waves around 1 ft.

$$

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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