Great Lakes Forecast
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973
FZUS63 KLOT 240155
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
855 PM CDT Mon Apr 23 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 29.9 inches over western Tennessee
will meander over the area through Tuesday then shift to the mid
Atlantic Coast by early Wednesday. A cold front will move across
Lake Michigan Tuesday evening. High pressure of 30.4 inches will
build across the Central Plains Tuesday night with a ridge axis
extending into the western Great Lakes, which will shift to the
Ohio Valley Thursday. Low pressure of 29.5 inches will move from
Hudson Bay Wednesday night to northern Quebec Thursday night as a
trailing cold front pushes across Lake Michigan.

LMZ261-362-364-366-563-565-567-868-240915-
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-
855 PM CDT Mon Apr 23 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...East winds 10 to 20 kt becoming northeast
10 to 15 kt. Waves 2 to 4 ft.
.TUESDAY...East winds 5 to 10 kt becoming northeast late in the
morning, then becoming north 10 to 15 kt early in the afternoon
increasing to 15 to 25 kt late. Slight chance of rain showers in
the afternoon. Waves 1 to 3 ft.
.TUESDAY NIGHT...North winds to 30 kt. Chance of rain showers in
the evening, then chance of rain and snow showers overnight.
Waves 4 to 6 ft occasionally to 8 ft building to 4 to 7 ft
occasionally to 9 ft.
.WEDNESDAY...North winds to 30 kt diminishing to 15 to 25 kt.
Waves 5 to 8 ft occasionally to 10 ft.
.WEDNESDAY NIGHT...North winds 10 to 15 kt backing to west. Waves
2 to 4 ft subsiding to 1 to 2 ft.
.THURSDAY...Southwest winds 10 to 20 kt. Waves 1 to 3 ft building
to 2 to 4 ft.
.THURSDAY NIGHT...West winds 15 to 25 kt veering to north. Chance
of rain and snow showers. Waves 3 to 5 ft.
.FRIDAY...North winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 3 to 5 ft.
.SATURDAY...Northwest winds 10 to 20 kt becoming north 10 to
15 kt. Waves 2 to 4 ft subsiding to 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-240915-
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-
855 PM CDT Mon Apr 23 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northeast winds 10 to 20 kt becoming southeast
10 to 15 kt. Chance of rain showers this evening, then slight
chance of rain showers overnight. Waves 2 to 4 ft.
.TUESDAY...Northeast winds 5 to 10 kt increasing to 10 to 15 kt
late in the morning, then becoming north early in the afternoon
increasing to 10 to 20 kt late. Chance of rain showers in the
morning, then slight chance of rain showers in the afternoon.
Waves 1 to 3 ft.
.TUESDAY NIGHT...North winds increasing to 30 kt. Waves 3 to 5 ft
building to 6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...North winds to 30 kt. Waves 6 to 9 ft occasionally
to 12 ft.
.WEDNESDAY NIGHT...North winds 10 to 20 kt becoming northwest
5 to 10 kt overnight. Waves 4 to 7 ft occasionally to 9 ft
subsiding to 2 to 4 ft.
.THURSDAY...Southwest winds 10 to 15 kt becoming south 10 to
20 kt. Waves 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt veering to
northwest to 30 kt overnight. Chance of rain showers. Waves 3 to
5 ft.
.FRIDAY...North winds to 30 kt diminishing to 15 to 25 kt. Chance
of rain showers. Waves 3 to 5 ft.
.SATURDAY...West winds 10 to 20 kt veering to north. Waves 2 to
4 ft.

$$
LMZ761-240915-
MAFOR 2403/
MICHIGAN NORTH 11220 11210 11110 11200 11100 11810 12830. Chance
of rain showers Tuesday evening. Waves 2 to 4 ft overnight. Waves
1 to 3 ft Tuesday. Waves 3 to 5 ft building to 4 to 6 ft
occasionally to 8 ft Tuesday evening.

MICHIGAN SOUTH 11120 12310 11100 11110 11810 11820 11830. Chance
of rain showers late Tuesday. Waves 2 to 4 ft overnight. Waves 1
to 3 ft Tuesday. Waves 3 to 5 ft building to 4 to 6 ft
occasionally to 8 ft Tuesday 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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