Great Lakes Forecast
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028
FZUS63 KLOT 170245
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
845 PM CST Thu Nov 16 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...High pressure ridging averaging 30.3 inches was from
Ontario...across the western Lakes to the Ohio Valley this
evening. This ridge will shift east of the Lakes to the mid
Atlantic coast Friday. Low pressure of 29.3 inches will lift
across the Canadian Prairies to Hudson Bay by Friday night.
Another low of 29.5 inches will deepen over the central Great
Plains Friday and move to lower Michigan Saturday morning. High
pressure of 30.3 inches will build across the Great Plains Sunday
and shift to the southeastern U.S. by Monday. Low pressure of 29.3
inches will move from southern Saskatchewan Monday to Quebec
Tuesday.

LMZ261-362-364-366-563-565-567-868-171030-
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-
845 PM CST Thu Nov 16 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

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

.REST OF TONIGHT...Northeast winds 10 to 15 kt becoming
southeast 10 to 20 kt after midnight...then becoming south and
increasing to 30 kt toward morning. Waves 2 to 4 ft building to
3 to 5 ft by morning.
.FRIDAY...South gales to 35 kt increasing to gales to 40 kt.
Slight chance of rain and snow in the morning...then rain likely
in the afternoon. Waves 4 to 6 ft occasionally to 8 ft early
building to 10 to 14 ft occasionally to 18 ft.
.FRIDAY NIGHT...South winds to 30 kt becoming southwest late in
the evening...then becoming west 10 to 20 kt after midnight and
north 15 to 25 kt late. Rain in the evening...then rain likely
overnight. Waves 8 to 12 ft occasionally to 16 ft subsiding to 4
to 7 ft occasionally to 9 ft.
.SATURDAY...North gales to 35 kt increasing to gales to 40 kt.
Rain likely in the morning...then chance of rain and snow in the
afternoon. Waves 4 to 7 ft occasionally to 9 ft building to 8 to
12 ft occasionally to 16 ft.
.SATURDAY NIGHT...Northwest gales to 40 kt diminishing to gales
to 35 kt. Chance of snow. Waves 10 to 14 ft occasionally to 18 ft
subsiding to 8 to 11 ft occasionally to 14 ft.
.SUNDAY...Northwest winds to 30 kt. Chance of snow in the
afternoon. Waves 6 to 9 ft occasionally to 12 ft subsiding to
4 to 6 ft occasionally to 8 ft.
.SUNDAY NIGHT...West winds 15 to 25 kt. Waves 3 to 5 ft.
.MONDAY...Southwest winds to 30 kt. Waves 4 to 6 ft occasionally
to 8 ft building to 7 to 10 ft occasionally to 13 ft.
.TUESDAY...West gales to 35 kt. Chance of rain. Waves 8 to 11 ft
occasionally to 14 ft subsiding to 6 to 9 ft occasionally to
12 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-171030-
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-
845 PM CST Thu Nov 16 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

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

.REST OF TONIGHT...Northeast winds 10 to 15 kt veering to
southeast overnight and increasing to 20 to 20 kt toward morning.
Waves 3 to 5 ft.
.FRIDAY...South winds to 30 kt increasing to south gales to 35 kt
in the morning...and to south gales to 40 kt by afternoon. Chance
of rain in the afternoon. Waves 5 to 8 ft occasionally to 10 ft
building to 10 to 14 ft occasionally to 18 ft.
.FRIDAY NIGHT...South winds to 30 kt becoming southwest late in
the evening...then becoming northwest 10 to 20 kt late. Rain.
Waves 8 to 12 ft occasionally to 16 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.SATURDAY...North gales to 35 kt increasing to gales to 45 kt in
the afternoon. Rain. Waves 4 to 7 ft occasionally to 9 ft
building to 10 to 14 ft occasionally to 18 ft.
.SATURDAY NIGHT...Northwest gales to 40 kt diminishing to gales
to 35 kt. Chance of rain in the evening...then chance of snow
overnight. Waves 12 to 16 ft occasionally to 21 ft.
.SUNDAY...Northwest winds to 30 kt. Waves 7 to 10 ft occasionally
to 13 ft subsiding to 5 to 8 ft occasionally to 10 ft.
.SUNDAY NIGHT...West winds 15 to 25 kt becoming southwest. Waves
4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft.
.MONDAY...Southwest winds to 30 kt increasing to gales to 35 kt.
Waves 4 to 6 ft occasionally to 8 ft building to 7 to 10 ft
occasionally to 13 ft.
.TUESDAY...West gales to 35 kt. Waves 8 to 11 ft occasionally to
14 ft subsiding to 6 to 9 ft occasionally to 12 ft.

$$
LMZ761-171030-
MAFOR 1704/
MICHIGAN NORTH...Gale Warning in effect...11210 11320 11440 11450
13456 11446. Waves 2 to 4 ft building to 3 to 5 ft overnight and
to building to 10 to 14 ft occasionally to 18 ft Friday. Waves
10 to 14 feet occasionally to 18 feet subsiding to 8 to 11 feet
occasionally to 14 feet Friday evening.

MICHIGAN SOUTH...Gale Warning in effect...11310 11420 19430 11440
13450 11456 11446. Chance of rain Friday afternoon. Waves 3 to 5
feet overnight building to 10 to 14 feet occasionally to 18 feet
Friday. Waves 8 to 12 feet occasionally to 16 feet Friday evening.


$$

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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