Great Lakes Forecast
Issued by NWS

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055
FZUS63 KLOT 190154
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
854 PM CDT Wed Apr 18 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...Low pressure of 29.5 inches over the Upper Ohio Valley
will move off the mid Atlantic coast Thursday morning. High
pressure of 30.5 inched over the northern and central plains will
settle over the middle Mississippi Valley Thursday and across the
western Great Lakes Friday through Sunday.

LMZ261-362-364-366-563-565-567-868-190930-
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-
854 PM CDT Wed Apr 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...North winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft building to 8 to 11 ft occasionally to 14
ft.
.THURSDAY...North winds to 30 kt becoming northwest 10 to 20 kt.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.THURSDAY NIGHT...North winds 10 to 20 kt becoming northwest 5 to
10 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.
.FRIDAY...West winds 5 to 10 kt becoming southwest. Waves 1 to
2 ft.
.FRIDAY NIGHT...Southwest winds 5 to 10 kt. Waves 1 ft or less.
.SATURDAY...South winds 5 to 10 kt becoming southwest. Waves
nearly calm.
.SATURDAY NIGHT...South winds 5 to 10 kt. Waves nearly calm.
.SUNDAY...South winds 5 to 10 kt. Waves nearly calm.
.MONDAY...South winds 10 to 15 kt. Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190930-
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-
854 PM CDT Wed Apr 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...North winds to 30 kt. Snow and slight chance
of rain this evening, then chance of snow overnight. Waves 6 to
9 ft occasionally to 12 ft building to 8 to 11 ft occasionally to
14 ft.
.THURSDAY...North winds to 30 kt becoming northwest. Waves 8 to
11 ft occasionally to 14 ft subsiding to 6 to 9 ft occasionally
to 12 ft.
.THURSDAY NIGHT...Northwest winds 15 to 25 kt becoming north 5 to
10 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to
4 ft.
.FRIDAY...Northwest winds 5 to 10 kt becoming west. Waves 1 to
2 ft.
.FRIDAY NIGHT...Southeast winds less than 10 kt. Waves 1 ft or
less.
.SATURDAY...Southeast winds 5 to 10 kt backing to northeast.
Waves nearly calm.
.SATURDAY NIGHT...Northeast winds 5 to 10 kt becoming east. Waves
1 ft or less.
.SUNDAY...Southeast winds 10 to 15 kt becoming east. Waves 1 to
2 ft.
.MONDAY...Southeast winds 10 to 15 kt becoming east 5 to 10 kt.
Waves 1 to 2 ft.

$$
LMZ761-190930-
MAFOR 1903/
MICHIGAN NORTH 15840 11730 111720. Waves 7 to 10 ft occasionally
to 13 ft building to 8 to 11 ft occasionally to 14 ft overnight.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 4 to 7 ft
occasionally to 9 ft Thursday. Waves 3 to 5 ft subsiding to 2 to 4
ft Thursday evening.

MICHIGAN SOUTH 11847 14840 11840 11740 11730. Chance of snow late
this evening. Waves 7 to 10 ft occasionally to 13 ft building to
8 to 11 ft occasionally to 14 ft overnight. Waves 8 to 11 ft
occasionally to 14 ft subsiding to 6 to 9 ft occasionally to 12
ft Thursday. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4
to 6 ft occasionally to 8 ft Thursday evening.

$$

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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