Great Lakes Forecast
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000
FZUS63 KLOT 131955
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
255 PM CDT Fri Oct 13 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 29.9 inches is over Kansas this
afternoon with troughing extending across Lake Michigan. The low
will deepen to 29.7 inches as it lifts across Iowa Saturday then to
central Lake Michigan late Saturday evening. 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.

LMZ261-362-364-366-563-565-140330-
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-
255 PM CDT Fri Oct 13 2017

TWO RIVERS WI TO MANISTEE MI NORTH...

...GALE WATCH IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY
EVENING...

.TONIGHT...Southwest winds 15 to 25 kt becoming west 10 to 20
kt...then veering to northeast 15 to 25 kt. Chance of showers
this evening...then slight chance of showers overnight. Waves 3 to
5 ft subsiding to 2 to 4 ft.
.SATURDAY...Northeast winds 15 to 25 kt becoming east to 30 kt.
Chance of showers in the morning...then showers in the afternoon.
Waves building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...East winds to 30 kt becoming north gales to
35 kt. Showers. Waves 4 to 6 ft occasionally to 8 ft building to
7 to 10 ft occasionally to 13 ft.
.SUNDAY...North gales to 40 kt diminishing to gales to 35 kt.
Rain showers in the morning...then chance of rain showers in the
afternoon. Waves 8 to 12 ft occasionally to 16 ft.
.SUNDAY NIGHT...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 2 to
4 ft.
.MONDAY...West winds 10 to 20 kt becoming southwest. Waves 2 to 4
ft.
.MONDAY 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.
.TUESDAY...Southwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...Southwest winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.

$$

LMZ567-669-671-673-868-870-872-874-140330-
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 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 Pentwater to Manistee MI 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-
255 PM CDT Fri Oct 13 2017

TWO RIVERS WI TO MANISTEE MI SOUTH TO WIND POINT WI TO HOLLAND
MI...

...GALE WATCH IN EFFECT FROM SATURDAY EVENING THROUGH SUNDAY
EVENING...

.TONIGHT...Southwest winds 10 to 20 kt becoming variable around 10
kt this evening...then becoming northeast 10 to 20 kt overnight.
Showers likely this evening...then showers with a chance of
thunderstorms overnight. Waves 2 to 4 ft.
.SATURDAY...Northeast winds 15 to 25 kt becoming southeast 10 to
20 kt. Showers likely with slight chance of thunderstorms in the
morning...then showers with a chance of thunderstorms in the
afternoon. Waves building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY NIGHT...Southeast winds 15 to 25 kt becoming south gales
to 35 kt in the evening...then becoming southwest gales to 35 kt
after midnight and becoming west late. Showers. Waves 3 to 5 ft
building to 7 to 10 ft occasionally to 13 ft.
.SUNDAY...Northwest gales to 40 kt diminishing to gales to 35 kt.
Chance of showers. Waves 10 to 14 ft occasionally to 18 ft.
.SUNDAY NIGHT...Northwest winds to 30 kt diminishing to 10 to
20 kt overnight. Waves 7 to 10 ft occasionally to 13 ft subsiding
to 4 to 6 ft occasionally to 8 ft.
.MONDAY...West winds 10 to 15 kt increasing to 10 to 20 kt. Waves
2 to 4 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 6 ft occasionally to 8 ft.
.WEDNESDAY...Southwest winds to 30 kt. Waves 5 to 8 ft
occasionally to 10 ft.

$$

LMZ080-675-777-779-876-878-140330-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
255 PM CDT Fri Oct 13 2017

WIND POINT WI TO HOLLAND MI SOUTH...

...GALE WATCH IN EFFECT FROM SATURDAY EVENING THROUGH SUNDAY
EVENING...

.TONIGHT...South winds 10 to 20 kt becoming southeast 10 to 15 kt
this evening...then south late. Chance of showers this
evening...then showers with a chance of thunderstorms overnight.
Waves 2 to 4 ft.
.SATURDAY...South winds 10 to 20 kt increasing to 15 to 25 kt
late. Showers and slight chance of thunderstorms in the
morning...then showers with thunderstorms likely in the afternoon.
Waves 2 to 4 ft.
.SATURDAY NIGHT...South winds 15 to 25 kt increasing to gales to
35 kt late in the evening...then becoming southwest overnight.
Showers with a chance of thunderstorms. Waves 2 to 4 ft building
to 7 to 10 ft occasionally to 13 ft.
.SUNDAY...Northwest gales to 40 kt diminishing to gales to 35 kt.
Chance of showers in the morning. Waves 8 to 11 ft occasionally
to 14 ft building to 8 to 12 ft occasionally to 16 ft.
.SUNDAY NIGHT...Northwest winds to 30 kt diminishing to 10 to
20 kt overnight. Waves 7 to 10 ft occasionally to 13 ft subsiding
to 4 to 6 ft occasionally to 8 ft.
.MONDAY...West winds 10 to 15 kt increasing to 10 to 20 kt. Waves
2 to 4 ft subsiding to 1 to 3 ft.
.MONDAY NIGHT...West winds 10 to 20 kt becoming southwest to
30 kt overnight. Waves 1 to 3 ft building to 3 to 5 ft.
.TUESDAY...Southwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...Southwest winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft.

$$

LMZ761-140330-
MAFOR 1321/
MICHIGAN NORTH 11530 11620 11820 14130 11246. Chance of showers
this evening. Chance of showers Saturday morning. Waves 3 to 5
feet subsiding to 2 to 4 feet tonight. Waves building to 4 to 6
feet occasionally to 8 feet Saturday.

MICHIGAN CENTRAL 11520 12906 12126 12136 11226. Chance of
thunderstorms overnight. Chance of thunderstorms Saturday. Waves
2 to 4 feet tonight. Waves 2 to 4 feet building to 4 to 6 feet
occasionally to 8 feet Saturday.

MICHIGAN SOUTH 11420 12310 12416 13426. Chance of showers this
evening. Chance of thunderstorms overnight. Chance of
thunderstorms Saturday. Waves 2 to 4 feet.

$$

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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