Great Lakes Forecast
Issued by NWS

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FZUS63 KLOT 221956
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
256 PM CDT Thu Jun 22 2017

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 29.4 inches over near Lake Winnipeg
will weaken to 29.5 inches as it moves over western Ontario
tonight. The low will cross Quebec Friday while dragging a cold
front across Lake Michigan tonight. The remnants of Tropical
Storm Cindy rapidly weaken to 29.7 inches as it crosses the
Tennessee and Ohio River Valleys Friday night. High pressure
averaging 30.3 inches will then build over the plains Sunday and
spread over the western Great Lakes Monday.

LMZ261-362-364-366-563-565-567-868-230315-
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-
256 PM CDT Thu Jun 22 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...West winds 10 to 20 kt diminishing to 10 to 15 kt.
Showers and thunderstorms likely this evening...then chance of
showers and thunderstorms overnight. Waves 2 to 4 ft.
.FRIDAY...West winds 10 to 15 kt increasing to 10 to 20 kt.
Slight chance of showers. Waves 1 to 3 ft.
.FRIDAY NIGHT...Northwest winds 10 to 20 kt. Waves 2 to 4 ft.
.SATURDAY...West winds 10 to 20 kt. Chance of showers in the
afternoon. Waves 2 to 4 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt increasing to 15 to
25 kt. Chance of showers. Waves 1 to 3 ft.
.SUNDAY...West winds 10 to 20 kt. Chance of showers. Waves 1 to
3 ft.
.SUNDAY NIGHT...Northwest winds 10 to 20 kt becoming north.
Chance of showers. Waves 1 to 3 ft.
.MONDAY...Northwest winds 10 to 20 kt. Waves 1 to 3 ft.
.TUESDAY...West winds 10 to 20 kt becoming southwest. Waves 1 to
3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-230315-
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-
256 PM CDT Thu Jun 22 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...South winds 15 to 25 kt veering to northwest 10 to
20 kt. Chance of showers and thunderstorms this evening...then
showers and thunderstorms overnight. Waves 3 to 5 ft.
.FRIDAY...Northwest winds 10 to 20 kt becoming west. Slight
chance of showers in the morning. Waves 2 to 4 ft subsiding to
1 to 3 ft.
.FRIDAY NIGHT...West winds 10 to 20 kt becoming northwest. Waves
3 to 5 ft.
.SATURDAY...Northwest winds 10 to 20 kt becoming west. Waves 3 to
5 ft.
.SATURDAY NIGHT...West winds 10 to 20 kt increasing to 15 to
25 kt. Waves 2 to 4 ft.
.SUNDAY...West winds 10 to 20 kt. Chance of showers in the
afternoon. Waves 2 to 4 ft.
.SUNDAY NIGHT...West winds 10 to 20 kt becoming northwest 15 to
25 kt. Chance of showers. Waves 2 to 4 ft.
.MONDAY...Northwest winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 2 to 4 ft.
.TUESDAY...West winds 10 to 20 kt becoming southwest. Waves 1 to
2 ft.

$$

LMZ761-230315-
MAFOR 2221/
MICHIGAN NORTH 12629 14610 12620. Chance of showers and
thunderstorms overnight. Slight chance of shower Friday. Waves 2
to 4 feet tonight. Waves 1 to 3 feet Friday.

MICHIGAN SOUTH 12430 11539 11639 11729 12720 11620. Chance of
showers and thunderstorms. Waves 3 to 5 feet tonight. Waves 2 to 4
feet subsiding to 1 to 3 feet Friday.

$$

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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