Great Lakes Forecast
Issued by NWS

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000
FZUS63 KLOT 180841
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
241 AM CST Sat Nov 18 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 eastern Kansas will
move to northern Indiana by late this 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.

LMZ261-362-364-366-563-565-567-868-181500-
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-
241 AM CST Sat Nov 18 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM 9 AM CST THIS MORNING THROUGH LATE
TONIGHT...

.TODAY...North winds to 30 kt increasing to gales to 40 kt by
late this morning. Rain likely this morning...then a chance of
rain and snow this afternoon. Waves 6 to 9 ft occasionally to 12
ft building to 8 to 12 ft occasionally to 16 ft.
.TONIGHT...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 becoming west 15 to 25 kt.
Chance of snow showers. Waves 6 to 9 ft occasionally to 12 ft
subsiding to 3 to 5 ft.
.SUNDAY NIGHT...West winds to 30 kt. Chance of snow showers in
the evening. Waves 4 to 6 ft occasionally to 8 ft.
.MONDAY...Southwest winds 15 to 25 kt increasing to 30 kt. Waves
building to 5 to 8 ft occasionally to 10 ft.
.MONDAY NIGHT...Southwest gales to 40 kt. Waves 8 to 12 ft
occasionally to 16 ft.
.TUESDAY...West gales to 35 kt becoming northwest to 30 kt.
Chance of snow. Waves 8 to 11 ft occasionally to 14 ft subsiding
to 6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt becoming west. Waves 2
to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-181500-
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-
241 AM CST Sat Nov 18 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT FROM 9 AM CST THIS MORNING THROUGH LATE
TONIGHT...

.TODAY...North winds to 30 kt increasing to gales to 45 kt by
late this morning. Rain this morning...then chance of rain this
afternoon. Waves 4 to 7 ft occasionally to 9 ft building to 12 to
16 ft occasionally to 21 ft.
.TONIGHT...Northwest gales to 40 kt diminishing to gales to 35
kt. Chance of rain and snow in the evening...then a chance of
snow overnight. 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 becoming west. Waves 8 to 11
ft occasionally to 14 ft subsiding to 4 to 7 ft occasionally to 9
ft.
.SUNDAY NIGHT...West winds to 30 kt. Waves 4 to 7 ft occasionally
to 9 ft.
.MONDAY...Southwest winds to 30 kt increasing to gales to 35 kt.
Waves 6 to 9 ft occasionally to 12 ft.
.MONDAY NIGHT...Southwest gales to 40 kt. Waves 8 to 12 ft
occasionally to 16 ft.
.TUESDAY...West gales to 35 kt becoming northwest to 30 kt. Waves
8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt becoming west. Waves 3
to 5 ft.

$$

LMZ761-181500-
MAFOR 1810/
MICHIGAN NORTH...Gale Warning in effect...12840 14850 11850
11750. Rain likely this morning. Chance of rain and snow this
afternoon. Chance of snow tonight. Waves 6 to 9 ft occasionally
to 12 ft building to 8 to 12 ft occasionally to 16 ft today...
subsiding to 7 to 10 ft occasionally to 13 ft tonight.

MICHIGAN SOUTH...Gale Warning in effect...10730 12846 11856
11866 11860 13750. Chance of rain and snow in the evening...then
a chance of snow overnight. Waves 4 to 7 ft occasionally to 9 ft
building to 12 to 16 ft occasionally to 21 ft today... subsiding
to 8 to 12 ft occasionally to 16 ft tonight.

$$

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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