Great Lakes Forecast
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275
FZUS63 KLOT 180753
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
253 AM CDT Wed Jul 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...High pressure of 30.1 inches centered over the
western Great Lakes will move to New England by Thursday. Low
pressure of 29.7 inches is expected to develop over the Northern
Plains this evening and deepen to 29.5 inches as it tracks to the
Upper Mississippi Valley Thursday night. This low will then reach
Lake Michigan by Friday night, and then slowly move southeast to
the Ohio Valley through the weekend.

LMZ261-362-364-366-563-565-567-868-181530-
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-
253 AM CDT Wed Jul 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TODAY...North winds 5 to 10 kt becoming variable around 10 kt
this afternoon. Waves 1 to 3 ft.
.TONIGHT...South winds 10 to 15 kt. Waves 1 to 2 ft.
.THURSDAY...South winds 5 to 10 kt increasing to 10 to 20 kt.
Waves 1 to 3 ft.
.THURSDAY NIGHT...Southeast winds 15 to 25 kt. Chance of showers
and thunderstorms overnight. Waves 3 to 5 ft building to 5 to
8 ft occasionally to 10 ft.
.FRIDAY...Southeast winds 15 to 25 kt becoming south. Chance of
showers and thunderstorms in the morning, then showers and
thunderstorms likely in the afternoon. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.FRIDAY NIGHT...Southwest winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of showers. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SATURDAY...Southwest winds 10 to 15 kt veering to north 10 to
20 kt. Chance of showers. Waves 1 to 2 ft.
.SUNDAY...North winds 15 to 25 kt. Chance of showers. Waves 4 to
7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-181530-
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-
253 AM CDT Wed Jul 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Northeast winds 10 to 15 kt becoming north this
afternoon. Occasional gusts to 20 kt. Waves 3 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft.
.TONIGHT...Northeast winds 10 to 15 kt veering to southeast.
Waves 1 to 3 ft.
.THURSDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southeast winds to 30 kt becoming south.
Showers and thunderstorms likely overnight. Waves 3 to 5 ft
building to 5 to 8 ft occasionally to 10 ft.
.FRIDAY...South winds 15 to 25 kt becoming southwest. Chance of
showers and thunderstorms. Waves 5 to 8 ft occasionally to 10 ft
subsiding to 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 2 to 4 ft subsiding to 1 to 3 ft.
.SATURDAY...West winds 10 to 15 kt becoming northwest 10 to
20 kt. 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.

$$

LMZ761-181530-
MAFOR 1809/
MICHIGAN NORTH 13800 12910 13410. Waves 1 to 3 ft today. Waves 1
to 2 ft tonight.

MICHIGAN SOUTH 11120 12110 12810 11110 12210. Waves 3 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft today. Waves 1 to 3 ft
tonight.

$$


Rodriguez

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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