Great Lakes Forecast
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FZUS63 KLOT 181954
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
254 PM 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 reach
southern Lake Michigan by Friday night, then slowly move
southeast to the Ohio Valley through the weekend.

LMZ261-362-364-366-563-565-567-868-190330-
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-
254 PM CDT Wed Jul 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.TONIGHT...South winds 5 to 10 kt increasing to 10 to 15 kt.
Waves 1 to 2 ft.
.THURSDAY...South winds 5 to 10 kt increasing to 10 to 20 kt and
becoming southeast late. Waves 1 to 3 ft.
.THURSDAY NIGHT...East winds 10 to 20 kt becoming southeast 15 to
25 kt. Chance of showers and thunderstorms overnight. Waves 2 to
4 ft building to 4 to 6 ft occasionally to 8 ft.
.FRIDAY...East winds 15 to 25 kt diminishing to 10 to 20 kt.
Chance of showers and thunderstorms. Waves 4 to 7 ft occasionally
to 9 ft.
.FRIDAY NIGHT...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Chance of showers. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SATURDAY...Northeast winds 10 to 20 kt. Chance of showers. Waves
1 to 3 ft.
.SATURDAY NIGHT...Northeast winds 10 to 20 kt. Chance of showers.
Waves 2 to 4 ft.
.SUNDAY...Northeast winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 3 to 5 ft.
.MONDAY...North winds 5 to 10 kt becoming northwest 10 to 15 kt.
Waves 1 to 3 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190330-
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-
254 PM CDT Wed Jul 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Northeast winds 10 to 15 kt veering to southeast.
Waves 1 to 2 ft.
.THURSDAY...Southeast winds 10 to 15 kt increasing to 10 to
20 kt. Waves 2 to 4 ft.
.THURSDAY NIGHT...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Chance of showers and thunderstorms in the evening, then
showers and thunderstorms likely overnight. Waves 2 to 4 ft
building to 4 to 7 ft occasionally to 9 ft.
.FRIDAY...Southeast winds 15 to 25 kt. Showers and thunderstorms
likely. Waves 4 to 7 ft occasionally to 9 ft.
.FRIDAY NIGHT...Northeast winds 10 to 20 kt becoming north.
Chance of showers. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SATURDAY...North winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers. Waves 2 to 4 ft.
.SATURDAY NIGHT...North winds 10 to 20 kt. Chance of showers.
Waves 3 to 5 ft.
.SUNDAY...North winds 10 to 20 kt becoming northeast. Chance of
showers. Waves 3 to 5 ft.
.MONDAY...Northeast winds 10 to 15 kt becoming north. Waves 2 to
4 ft.

$$

LMZ761-190330-
MAFOR 1821/
MICHIGAN NORTH 14410 11410 11400 12410. Waves 1 to 2 ft tonight.
Waves 1 to 3 ft Thursday.

MICHIGAN SOUTH 12110 12210 13310 11320.
Waves 1 to 2 ft tonight. Waves 2 to 4 ft Thursday.

$$


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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