Great Lakes Forecast
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FZUS63 KLOT 221343
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
843 AM CDT Tue May 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...Low pressure of 30.0 inches will move across the
eastern Great Lakes tonight. High pressure of 30.1 inches will
build over the western Great Lakes today and shift to the eastern
lakes by Thursday then to the mid Atlantic Coast Thursday night.
Low pressure of 29.6 inches will move from Manitoba Thursday night
into the Upper Midwest Saturday night while it fills.

LMZ261-362-364-366-563-565-567-868-222115-
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-
843 AM CDT Tue May 22 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...North winds around 10 kt becoming variable this
afternoon. Patchy fog this morning. Waves 1 to 2 ft.
.TONIGHT...Southwest winds 5 to 10 kt. Waves 1 to 2 ft.
.WEDNESDAY...Southwest winds 5 to 10 kt increasing to 10 to
15 kt. Waves 1 to 2 ft.
.WEDNESDAY NIGHT...Southwest winds 5 to 10 kt. Waves 1 to 2 ft.
.THURSDAY...Southwest winds 10 to 15 kt increasing to 10 to
20 kt. Waves 1 to 2 ft building to 1 to 3 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.FRIDAY...Southwest winds 15 to 25 kt. Chance of showers and
thunderstorms. Waves 3 to 5 ft.
.SATURDAY...South winds 10 to 15 kt becoming southeast. Waves
2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-222115-
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-
843 AM CDT Tue May 22 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...DENSE FOG ADVISORY IN EFFECT UNTIL 4 PM CDT THIS AFTERNOON...

.REST OF TODAY...North winds 10 to 15 kt. Areas of dense fog.
Waves 1 to 3 ft.
.TONIGHT...North winds around 10 kt becoming northwest after
midnight. Patchy fog. Waves 1 to 3 ft.
.WEDNESDAY...Northeast winds less than 10 kt veering to south
late in the morning, then becoming southwest 10 to 15 kt. Waves 1
to 2 ft.
.WEDNESDAY NIGHT...Southeast winds 5 to 10 kt. Waves 1 to 2 ft.
.THURSDAY...South winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 2 ft.
.THURSDAY NIGHT...South winds 10 to 20 kt. Waves 2 to 4 ft.
.FRIDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.
.SATURDAY...Southwest winds 10 to 20 kt becoming south 10 to
15 kt. Waves 1 to 3 ft.

$$

LMZ761-222115-
MAFOR 2215/
MICHIGAN NORTH 11810 12900 14500 11500. Waves 1 to 2 ft.

MICHIGAN SOUTH 12814 12810 11800 12700 11100. Waves 1 to 3 ft.

$$


KJB

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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