Great Lakes Forecast
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000
FZUS63 KLOT 171950
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
250 PM CDT Tue Jul 17 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 30.2 inches over the Northern Plains
and southern Canada will build across the western Great Lakes
tonight, then move to New England by Thursday. Low pressure of
29.6 inches will move from southern Saskatchewan Wednesday to Lake
Michigan Friday night then meander to the upper Ohio River Valley
Sunday night.

LMZ261-362-364-366-563-565-567-868-180330-
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-
250 PM CDT Tue Jul 17 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...North winds 10 to 20 kt diminishing to around 10 kt.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.WEDNESDAY...North winds 5 to 10 kt becoming variable. Waves 1 to
2 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 15 kt becoming south
5 to 10 kt. Waves 1 to 2 ft.
.THURSDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.THURSDAY NIGHT...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Chance of showers and thunderstorms overnight. Waves 1 to
3 ft building to 3 to 5 ft.
.FRIDAY...Southeast winds 15 to 25 kt. Chance of showers and
thunderstorms in the morning, then showers likely with a chance
of thunderstorms in the afternoon. Waves 4 to 6 ft occasionally
to 8 ft.
.FRIDAY NIGHT...Southeast winds 10 to 20 kt becoming south 10 to
15 kt. Chance of showers. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SATURDAY...East winds 10 to 15 kt backing to northeast 10 to
20 kt. Chance of showers. Waves 1 to 3 ft.
.SUNDAY...Northeast winds 15 to 25 kt. Chance of showers. Waves
4 to 6 ft occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-180330-
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-
250 PM CDT Tue Jul 17 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...North winds 10 to 20 kt becoming northeast and
diminishing to 10 to 15 kt. Waves 3 to 6 ft subsiding to 2 to 4
ft.
.WEDNESDAY...Northeast winds 10 to 15 kt becoming north. Waves 1
to 3 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 20 kt diminishing to
5 to 10 kt late in the evening, then becoming southeast overnight.
Waves 2 to 4 ft subsiding to 1 to 3 ft.
.THURSDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 1 to 3 ft.
.THURSDAY NIGHT...Southeast winds 15 to 25 kt becoming south.
Chance of showers and thunderstorms overnight. Waves 2 to 4 ft
building to 3 to 5 ft.
.FRIDAY...South winds 15 to 25 kt. Chance of showers and
thunderstorms in the morning, then showers likely with a chance
of thunderstorms in the afternoon. Waves 4 to 6 ft occasionally
to 8 ft.
.FRIDAY NIGHT...Southwest winds 10 to 20 kt becoming west 10 to
15 kt. Chance of showers. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SATURDAY...West winds 10 to 20 kt becoming northwest. Chance of
showers. Waves 1 to 3 ft.
.SUNDAY...North winds 15 to 25 kt. Chance of showers. Waves 4 to
7 ft occasionally to 9 ft.

$$

LMZ761-180330-
MAFOR 1721/
MICHIGAN NORTH 12820 12110 12800 12900. Waves 2 to 4 ft subsiding
to 1 to 3 ft tonight. Waves 1 to 2 ft Wednesday.

MICHIGAN SOUTH 12820 12120 13110 11810. Waves 3 to 6 ft subsiding
to 2 to 4 ft tonight. Waves 1 to 3 ft Wednesday.

$$

BMD

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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