Great Lakes Forecast
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000
FZUS63 KLOT 150206
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
906 PM CDT Sat Oct 14 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 29.6 inches is near the Mississippi
river south of Lacrosse Wisconsin this evening. This low will
deepen to 29.5 inches as it lifts across central Lake Michigan
overnight. The low will continue to deepen to 29.4 inches as it
lifts to the southern Quebec Sunday. High pressure of 30.4 inches
will build across the Great Plains Sunday and then shift to the
mid Atlantic Coast Tuesday into Wednesday where it will remain
through Friday.

LMZ261-362-364-366-563-565-567-669-868-870-150930-
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 Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
906 PM CDT Sat Oct 14 2017

PORT WASHINGTON WI TO WHITEHALL MI NORTH...

...GALE WARNING IN EFFECT FROM 4 AM CDT SUNDAY THROUGH SUNDAY
EVENING...

.REST OF TONIGHT...East gales to 35 kt backing to north. Showers
this evening...then showers likely overnight. Waves 7 to 10 ft
occasionally to 13 ft building to 8 to 11 ft occasionally to 14
ft.
.SUNDAY...North gales to 40 kt increasing to gales to 45 kt...
then becoming northwest gales to 40 kt late. Showers likely in
the morning...then slight chance of showers in the afternoon.
Waves 8 to 11 ft occasionally to 14 ft building to 12 to 16 ft
occasionally to 21 ft.
.SUNDAY NIGHT...Northwest winds to 30 kt diminishing to 10 to
20 kt. Waves 8 to 12 ft occasionally to 16 ft subsiding to 3 to
5 ft.
.MONDAY...West winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY NIGHT...Southwest winds to 30 kt increasing to gales to
35 kt. Waves 4 to 6 ft occasionally to 8 ft building to 4 to 7 ft
occasionally to 9 ft.
.TUESDAY...West winds to 30 kt becoming southwest 10 to 20 kt in
the afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.TUESDAY NIGHT...Southwest winds 15 to 25 kt increasing to 30 kt.
Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...Southwest winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft. s likely in
the morning...then slight chance
.THURSDAY...West winds 10 to 20 kt becoming southwest 10 to
15 kt. Waves 3 to 5 ft subsiding to 2 to 4 ft.

$$

LMZ080-671-673-675-777-779-872-874-876-878-150930-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
906 PM CDT Sat Oct 14 2017

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

...GALE WARNING IN EFFECT THROUGH SUNDAY EVENING...

.REST OF TONIGHT...Southeast winds 20 to 25 kt increasing to 30
kt by midnight...then becoming southwest gales to 35 kt
overnight. Showers with a chance of thunderstorms this evening...
then showers likely with slight chance of thunderstorms overnight.
Waves 4 to 6 ft occasionally to 8 ft building to 8 to 12 ft
occasionally to 16 ft.
.SUNDAY...West gales to 40 kt becoming northwest gales to 45
kt...then easing to 35 kt late. Chance of showers in the
morning...then slight chance of showers in the afternoon. Waves 12
to 16 ft occasionally to 21 ft.
.SUNDAY NIGHT...Northwest winds to 30 kt diminishing to 10 to
20 kt. Waves 8 to 12 ft occasionally to 16 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.MONDAY...West winds 10 to 20 kt. Waves 3 to 5 ft subsiding to
1 to 3 ft.
.MONDAY NIGHT...Southwest winds 15 to 25 kt increasing to 30 kt.
Waves 2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.
.TUESDAY...Southwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 4 to 7 ft occasionally to 9 ft.
.TUESDAY NIGHT...Southwest winds 15 to 25 kt increasing to 30 kt.
Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...Southwest winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.THURSDAY...Southwest winds 10 to 20 kt diminishing to 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.

$$

LMZ761-150930-
MAFOR 1503/
MICHIGAN NORTH...Gale Warning in effect...12256 11156 11856 11866
11860 11750 11740. Chance of showers Sunday. Waves 7 to 10 feet
occasionally to 13 feet building to 8 to 11 ft occasionally to 14
ft overnight. Waves building to 12 to 16 feet occasionally to 21
feet Sunday. Waves 8 to 12 feet occasionally to 16 feet subsiding
to 6 to 9 feet occasionally to 12 feet Sunday evening.

MICHIGAN SOUTH...Gale Warning in effect...11336 19446 11556 11550
11650 12760 11750 11740. Chance of showers late Sunday. Waves 4
to 6 feet occasionally to 8 feet building to 8 to 12 feet
occasionally to 16 feet overnight. Waves 12 to 16 feet
occasionally to 21 feet Sunday. Waves subsiding to 8 to 12 feet
occasionally to 16 feet Sunday evening.

$$


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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