Great Lakes Forecast
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000
FZUS63 KLOT 220206
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
806 PM CST Tue Nov 21 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 near James Bay will move
to northern Quebec tonight as broad high pressure of 30.4 inches
builds across the central Great Plains tonight, and then gradually
shifts to the lower Mississippi Valley Wednesday and Wednesday
night. A trough of low pressure averaging 29.8 inches will move
across Ontario and the Great Lakes on Thursday, with a deeper low
pressure system of 28.9 inches quickly moving through Manitoba
and Ontario by early Friday.

LMZ261-362-364-366-563-565-567-868-221030-
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-
806 PM CST Tue Nov 21 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...Northwest winds to 30 kt. Scattered snow
showers. Waves 5 to 8 ft occasionally to 10 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt backing to southwest.
Waves gradually subsiding to 3 to 5 ft.
.WEDNESDAY NIGHT...Southwest winds 15 to 25 kt increasing to
30 kt. Chance of snow overnight. Waves building to 4 to 7 ft
occasionally to 9 ft.
.THURSDAY...West winds 15 to 25 kt diminishing to 10 to 20 kt.
Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt becoming southwest to
30 kt overnight. Waves 1 to 3 ft building to 4 to 6 ft
occasionally to 8 ft.
.FRIDAY...Southwest gales to 40 kt. Chance of rain in the
afternoon. Waves 8 to 11 ft occasionally to 14 ft building to
10 to 14 ft occasionally to 18 ft.
.FRIDAY NIGHT...Southwest gales to 40 kt becoming west gales to
35 kt. Chance of rain. Waves 10 to 14 ft occasionally to 18 ft
subsiding to 7 to 10 ft occasionally to 13 ft.
.SATURDAY...Northwest gales to 35 kt diminishing to 30 kt. Chance
of rain and snow. Waves 6 to 9 ft occasionally to 12 ft.
.SUNDAY...Northwest winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-221030-
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-
806 PM CST Tue Nov 21 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northwest winds to 30 kt diminishing to 15 to
25 kt. Waves 6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt backing to southwest.
Waves subsiding to 3 to 5 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 kt increasing to
30 kt. Waves 4 to 6 ft occasionally to 8 ft.
.THURSDAY...West winds to 30 kt diminishing to 10 to 20 kt in the
afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt becoming southwest 15 to
25 kt. Waves 2 to 4 ft.
.FRIDAY...South gales to 35 kt increasing to gales to 40 kt.
Waves 5 to 8 ft occasionally to 10 ft building to 7 to 10 ft
occasionally to 13 ft.
.FRIDAY NIGHT...Southwest gales to 40 kt becoming west gales to
35 kt. Chance of rain. Waves 7 to 10 ft occasionally to 13 ft
subsiding to 6 to 9 ft occasionally to 12 ft.
.SATURDAY...West gales to 35 kt becoming northwest to 30 kt.
Chance of rain. Waves 6 to 9 ft occasionally to 12 ft.
.SUNDAY...Northwest winds 10 to 20 kt. Waves 3 to 5 ft subsiding
to 2 to 4 ft.

$$
LMZ761-221030-
MAFOR 2204/
MICHIGAN NORTH 13740 12730 11630 12530. Scattered snow showers
tonight. Waves 5 to 8 ft occasionally to 10 ft tonight gradually
subsiding to 3 to 5 ft Wednesday.

MICHIGAN SOUTH 12740 11730 12720 11620 12520. Waves 6 to 9 ft
occasionally to 12 ft tonight gradually subsiding to 3 to 5 ft
Wednesday.

$$

- Izzi

Experimental modernized open lake forecast is available online at
weather.gov/lot/glftable


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