Great Lakes Forecast
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000
FZUS63 KLOT 231439
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
839 AM CST Thu Nov 23 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 of 30.1 inches across the eastern Lakes
and Appalachians today will move east to the mid Atlantic
tonight. Meanwhile, low pressure of 29.0 inches across Alberta
will track east to James Bay by Friday evening. A cold front
trailing from this low will move across the lake Friday night with
a 30.1 inch ridge of high pressure building east in the wake of
this cold front. The high will move across the western Great Lakes
over the weekend with a 29.2 inch low forecast to develop over
the Northern Plains Sunday night.

LMZ261-362-364-366-563-565-567-868-232230-
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-
839 AM CST Thu Nov 23 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
EVENING...

.REST OF TODAY...Southwest winds 15 to 20 kt becoming west early
this afternoon. Slight chance of rain and snow showers through
early afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding to
2 to 4 ft.
.TONIGHT...Southwest winds 10 to 20 kt steadily increasing to
gales to 40 kt by daybreak. Waves 2 to 4 ft building to 6 to 9 ft
occasionally to 12 ft.
.FRIDAY...Southwest gales to 40 kt. Chance of rain in the
afternoon. Waves 10 to 14 ft occasionally to 18 ft.
.FRIDAY NIGHT...West gales to 35 kt becoming northwest to 30 kt
in the evening. Chance of rain in the evening. Waves 8 to 12 ft
occasionally to 16 ft subsiding to 5 to 8 ft occasionally to 10
ft.
.SATURDAY...Northwest winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.SATURDAY NIGHT...Northwest winds to 30 kt diminishing to 15 to
25 kt overnight. Waves 3 to 6 ft occasionally to 8 ft.
.SUNDAY...West winds 15 to 25 kt increasing to 30 kt. Waves 3 to
6 ft occasionally to 8 ft.
.MONDAY...South winds 15 to 25 kt increasing to 30 kt. Waves
building to 5 to 8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-232230-
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-
839 AM CST Thu Nov 23 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

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

.REST OF TODAY...Southwest winds 15 to 20 kt. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
.TONIGHT...Southwest winds 10 to 20 kt steadily increasing to 30
kt by the predawn hours. Waves 3 to 5 ft building to 4 to 7 ft
occasionally to 9 ft.
.FRIDAY...Southwest gales to 35 kt increasing to 40 kt by late
morning. Waves building to 8 to 12 ft occasionally to 16 ft.
.FRIDAY NIGHT...West gales to 35 kt becoming northwest to 30 kt
in the evening. Waves 7 to 10 ft occasionally to 13 ft subsiding
to 5 to 8 ft occasionally to 10 ft.
.SATURDAY...Northwest winds to 30 kt. Waves 5 to 8 ft
occasionally to 10 ft.
.SATURDAY NIGHT...Northwest winds to 30 kt diminishing to 10 to
20 kt overnight. Waves 4 to 7 ft occasionally to 9 ft subsiding
to 3 to 5 ft.
.SUNDAY...West winds 10 to 20 kt becoming southwest 15 to 25 kt.
Waves 3 to 5 ft.
.MONDAY...Southwest winds 15 to 25 kt becoming south to 30 kt.
Waves building to 4 to 7 ft occasionally to 9 ft.

$$
LMZ761-232230-
MAFOR 2316/
MICHIGAN NORTH...Gale Warning in effect...11520 12620 11520 11530
11540 12550. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2
to 4 ft this afternoon. Waves building to 6 to 9 ft occasionally
to 12 ft through tonight, further building to 10 to 14 ft
occasionally to 18 ft early Friday morning.

MICHIGAN SOUTH 14520 11520 11530 11540 11550. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft this afternoon. Waves
building to 4 to 7 ft occasionally to 9 ft overnight, further
building to 6 to 9 ft occasionally to 12 ft early Friday morning.

$$

MTF

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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