Great Lakes Forecast
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000
FZUS63 KMKX 200757
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Milwaukee/Sullivan WI
257 AM CDT Thu Sep 20 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 29.5 inches over the Central Plains will lift
into western Lake Superior this evening. The low will track
across the Upper Great Lakes tonight while dragging a strong cold
front across the lake. High pressure of 30.3 inches will spread
across the Upper Mississippi Valley and Great Lakes Region through
Saturday.

LMZ261-362-364-366-563-565-567-868-201515-
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-
257 AM CDT Thu Sep 20 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM THIS EVENING THROUGH FRIDAY
EVENING...

.TODAY...East winds 10 to 20 kt becoming southeast to 30 kt.
Showers with a chance of thunderstorms this morning, then chance
of showers and thunderstorms this afternoon. Waves 1 to 2 ft
building to 2 to 4 ft.
.TONIGHT...Southeast winds to 30 kt becoming south gales to
40 kt, then becoming southwest late. Chance of showers and
thunderstorms in the evening, then slight chance of showers and
thunderstorms overnight. Waves 4 to 6 ft occasionally to 8 ft
building to 8 to 12 ft occasionally to 16 ft.
.FRIDAY...Southwest gales to 40 kt becoming northwest gales to
35 kt. Waves 8 to 12 ft occasionally to 16 ft subsiding to 7 to
10 ft occasionally to 13 ft.
.FRIDAY NIGHT...North winds to 30 kt becoming northeast 10 to
20 kt overnight. Waves 5 to 8 ft occasionally to 10 ft.
.SATURDAY...Southeast winds 5 to 10 kt veering to southwest 10 to
20 kt in the afternoon. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt becoming northwest.
Waves 1 to 2 ft.
.SUNDAY...North winds 10 to 15 kt becoming east 10 to 20 kt.
Waves 1 to 3 ft.
.MONDAY...Southeast winds 15 to 25 kt becoming south. Waves 4 to
6 ft occasionally to 8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-201515-
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-
257 AM CDT Thu Sep 20 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TODAY...Southeast winds 10 to 20 kt becoming south 15 to 25 kt.
Chance of showers and thunderstorms this morning, then slight
chance of showers and thunderstorms this afternoon. Waves 2 to
4 ft.
.TONIGHT...South winds to 30 kt becoming southwest gales to
35 kt. Slight chance of showers and thunderstorms overnight.
Waves 4 to 6 ft occasionally to 8 ft building to 8 to 11 ft
occasionally to 14 ft.
.FRIDAY...Southwest winds to 30 kt becoming northwest gales to
35 kt. Waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to
9 ft occasionally to 12 ft.
.FRIDAY NIGHT...North winds to 30 kt becoming northeast 10 to
20 kt overnight. Waves 6 to 9 ft occasionally to 12 ft.
.SATURDAY...East winds 10 to 15 kt diminishing to 5 to 10 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to 4 ft.
.SATURDAY NIGHT...East winds 5 to 10 kt becoming southeast. Waves
1 to 2 ft.
.SUNDAY...East winds 5 to 10 kt increasing to 10 to 15 kt. Waves
1 to 2 ft.
.MONDAY...Southeast winds 10 to 20 kt. Waves 4 to 6 ft
occasionally to 8 ft.

$$

LMZ761-201515-
MAFOR 2009/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11219 12229 11239 12349
12450. Showers and thunderstorms likely through this evening.
Waves 2 to 4 ft today. Waves 4 to 6 ft occasionally to 8 ft
building to 8 to 12 ft occasionally to 16 ft tonight.

MICHIGAN SOUTH 11229 12329 11330 14440. Showers and thunderstorms
likely through late morning. Waves 2 to 4 ft today. Waves 4 to 6
ft occasionally to 8 ft building to 8 to 11 ft occasionally to 14
ft tonight.

$$


Cronce

Experimental modernized open lake forecast is available online at
weather.gov/mkx/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes


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