Great Lakes Forecast
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000
FZUS63 KLOT 182038
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
238 PM 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 29.2 inches is centered over northern
Indiana this afternoon and will lift to Lake Ontario late this
evening deepening to 29.0 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 30.4 inches will
build across the central and northern Great Plains Tuesday and
gradually shift to the lower Mississippi Valley Thursday.

LMZ261-362-364-366-563-565-567-868-190500-
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-
238 PM CST Sat Nov 18 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TONIGHT...North gales to 40 kt becoming northwest gales to
35 kt. Chance of rain and snow this evening...then chance of snow
overnight. Waves 10 to 14 ft occasionally to 18 ft subsiding to
7 to 10 ft occasionally to 13 ft.
.SUNDAY...Northwest winds to 30 kt becoming west. Chance of snow
in the morning...then slight chance of snow in the afternoon.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.SUNDAY NIGHT...West winds to 30 kt diminishing to 15 to 25 kt.
Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to 5 ft.
.MONDAY...Southwest winds 15 to 25 kt becoming south to 30 kt.
Waves 3 to 5 ft 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 in the afternoon. Waves 7 to 10 ft occasionally to
13 ft subsiding to 5 to 8 ft occasionally to 10 ft.
.TUESDAY NIGHT...Northwest winds to 30 kt diminishing to 15 to
25 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt becoming west. Waves
2 to 4 ft subsiding to 1 to 3 ft.
.THURSDAY...West winds to 30 kt. Waves 4 to 6 ft occasionally to
8 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190500-
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-
238 PM CST Sat Nov 18 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.TONIGHT...North gales to 45 kt becoming northwest diminishing to
gales to 35 kt. Chance of rain this evening...then chance of rain
and snow overnight. Waves 12 to 16 ft occasionally to 21 ft
subsiding to 10 to 14 ft occasionally to 18 ft.
.SUNDAY...Northwest winds to 30 kt becoming west. Chance of snow
in the morning...then slight chance of snow in the afternoon.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9 ft
occasionally to 12 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 4 to 7 ft occasionally to 9 ft building to 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 6 to 9 ft
occasionally to 12 ft.
.TUESDAY NIGHT...Northwest winds to 30 kt diminishing to 15 to
25 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
7 ft occasionally to 9 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt becoming west 10 to
15 kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.THURSDAY...West winds 15 to 25 kt. Waves 3 to 5 ft.

$$

LMZ761-190500-
MAFOR 1822/
MICHIGAN NORTH...Gale Warning in effect...11850 14750 13740.
Chance of rain and snow this evening. Chance of snow after
midnight tonight. Chance of snow Sunday morning. Waves 10 to 14
feet occasionally to 18 feet subsiding to 7 to 10 feet
occasionally to 13 feet tonight. Waves 7 to 10 feet occasionally
to 13 feet subsiding to 4 to 6 feet occasionally to 8 feet
Sunday.

MICHIGAN SOUTH...Gale Warning in effect...12860 13750 12740 11640.
Chance of rain this evening...Then chance of rain and snow after
midnight tonight. Chance of snow Sunday morning. Waves 12 to 16
feet occasionally to 21 feet subsiding to 10 to 14 feet
occasionally to 18 feet tonight. Waves 8 to 11 feet occasionally
to 14 feet subsiding to 6 to 9 feet occasionally to 12 feet
Sunday.

$$

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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