Great Lakes Forecast
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000
FZUS63 KLOT 180251
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
851 PM CST Fri Nov 17 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 29.4 inches over Kansas will move to
northern Indiana by late Saturday morning...while deepening to
around 29.2 inches. The low will lift into Quebec Sunday further
deepening to 28.8 inches. High pressure of 30.3 inches will build
across the central and southern Great Plains Sunday and shift to
the southeastern U.S. by Monday. Low pressure of 29.2 inches will
move from southern Saskatchewan early Monday to Quebec late
Tuesday. Broad high pressure of 30.3 inches will build across the
central and northern Great Plains Wednesday and shift across the
Mississippi Valley Friday.

LMZ261-362-364-366-563-565-567-868-181045-
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-
851 PM CST Fri Nov 17 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM SATURDAY MORNING THROUGH LATE
SATURDAY NIGHT...

.REST OF TONIGHT...South winds 20 to 25 kt veering to north.
Patchy fog. Rain through early evening...then rain likely
overnight. Waves 8 to 11 ft occasionally to 14 ft subsiding to 4
to 7 ft occasionally to 9 ft.
.SATURDAY...North winds to 30 kt increasing to gales to 40 kt.
Rain likely in the morning...then chance of rain in the
afternoon. Waves building to 8 to 12 ft occasionally to 16 ft.
.SATURDAY NIGHT...North gales to 35 kt becoming northwest to
30 kt late. Chance of snow. Waves 8 to 12 ft occasionally to 16
ft subsiding to 7 to 10 ft occasionally to 13 ft.
.SUNDAY...Northwest winds to 30 kt. Waves 6 to 9 ft occasionally
to 12 ft subsiding to 4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...West winds to 30 kt diminishing to 15 to 25 kt.
Chance of snow in the evening. Waves 3 to 5 ft.
.MONDAY...Southwest winds 15 to 25 kt increasing to 30 kt. Waves
3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.
.MONDAY NIGHT...Southwest gales to 35 kt. Waves 8 to 11 ft
occasionally to 14 ft.
.TUESDAY...West gales to 35 kt becoming northwest to 30 kt. Waves
7 to 10 ft occasionally to 13 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 3 to 5 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-181045-
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-
851 PM CST Fri Nov 17 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT FROM SATURDAY MORNING THROUGH LATE
SATURDAY NIGHT...

.REST OF TONIGHT...South winds to 30 kt becoming southwest 15 to
25 kt after midnight...then becoming northwest 10 to 20 kt late.
Patchy fog. Rain with areas of drizzle. Waves 7 to 10 ft
occasionally to 13 ft subsiding to 4 to 7 ft occasionally to
9 ft.
.SATURDAY...North winds to 30 kt increasing to gales to 45 kt.
Rain. Waves 4 to 7 ft occasionally to 9 ft building to 12 to 16
ft occasionally to 21 ft.
.SATURDAY NIGHT...Northwest gales to 40 kt diminishing to gales
to 35 kt. Chance of rain and snow in the evening. Waves 12 to
16 ft occasionally to 21 ft subsiding to 8 to 12 ft occasionally
to 16 ft.
.SUNDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.SUNDAY NIGHT...West winds to 30 kt. Waves 4 to 6 ft occasionally
to 8 ft.
.MONDAY...Southwest winds to 30 kt increasing to gales to 35 kt.
Waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft
occasionally to 10 ft.
.MONDAY NIGHT...Southwest gales to 35 kt. Waves 8 to 11 ft
occasionally to 14 ft.
.TUESDAY...West gales to 35 kt diminishing to 30 kt. Waves 7 to
10 ft occasionally to 13 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt. Waves 3 to 5 ft
subsiding to 2 to 4 ft.

$$

LMZ761-181045-
MAFOR 1804/
MICHIGAN NORTH...Gale Warning in effect...11436 11726 11836 11846
14850. Chance of rain Saturday afternoon. Chance of snow and rain
Saturday evening. Waves 8 to 11 feet occasionally to 14 feet
subsiding to 4 to 7 feet occasionally to 9 feet overnight. Waves
building to 8 to 12 feet occasionally to 16 feet Saturday and
Saturday evening.

MICHIGAN SOUTH...Gale Warning in effect...11446 11536 11726 11846
11856 11866 11860 11750. Areas of drizzle overnight. Chance of
rain Saturday afternoon and Saturday evening. Waves 7 to 10 feet
occasionally to 13 feet subsiding to 4 to 7 feet occasionally to 9
feet overnight. Waves 4 to 7 feet occasionally to 9 feet building
to 12 to 16 feet occasionally to 21 feet Saturday and Saturday
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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