Great Lakes Forecast
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606
FZUS63 KLOT 202045
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
245 PM CST Mon Nov 20 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 30.2 inches across the southeastern
states will move to the east tonight while low pressure of 29.2
inches moves from southern Manitoba to Ontario tonight, and 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, while a
trough of low pressure averaging 29.7 inches moves across Ontario
and the Great Lakes.

LMZ261-362-364-366-563-565-567-868-210430-
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-
245 PM CST Mon Nov 20 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT THROUGH TUESDAY AFTERNOON...

.TONIGHT...Southwest gales to 40 kt. Waves 8 to 11 ft
occasionally to 14 ft building to 12 to 16 ft occasionally to 21
ft.
.TUESDAY...West gales to 40 kt becoming northwest gales to 35 kt.
Chance of snow showers in the afternoon. Waves 10 to 14 ft
occasionally to 18 ft subsiding to 6 to 9 ft occasionally to
12 ft.
.TUESDAY NIGHT...Northwest winds to 30 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 southwest.
Waves 3 to 5 ft subsiding to 1 to 3 ft.
.WEDNESDAY NIGHT...Southwest winds 15 to 25 kt increasing to
30 kt. Waves 3 to 5 ft.
.THURSDAY...West winds 15 to 25 kt. Waves 3 to 5 ft.
.THURSDAY NIGHT...Northwest winds 10 to 20 kt becoming west.
Waves 2 to 4 ft.
.FRIDAY...Southwest gales to 35 kt increasing to gales to 40 kt.
Chance of rain. Waves 5 to 8 ft occasionally to 10 ft building to
7 to 10 ft occasionally to 13 ft.
.SATURDAY...Northwest winds to 30 kt. Chance of snow and rain.
Waves 5 to 8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-210430-
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-
245 PM CST Mon Nov 20 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT THROUGH TUESDAY AFTERNOON...

.TONIGHT...Southwest gales to 40 kt. Waves 8 to 12 ft
occasionally to 16 ft building to 12 to 16 ft occasionally to 21
ft.
.TUESDAY...West gales to 40 kt diminishing to gales to 35 kt late
in the morning...then becoming northwest to 30 kt in the
afternoon. Waves 10 to 14 ft occasionally to 18 ft subsiding to
7 to 10 ft occasionally to 13 ft.
.TUESDAY NIGHT...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 becoming west 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.WEDNESDAY NIGHT...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.THURSDAY...Southwest winds 15 to 25 kt becoming west 10 to
20 kt. Waves 3 to 5 ft.
.THURSDAY NIGHT...West winds 10 to 20 kt becoming southwest.
Waves 2 to 4 ft.
.FRIDAY...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.
.SATURDAY...Northwest winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.

$$

LMZ761-210430-
MAFOR 2022/
MICHIGAN NORTH...Gale Warning in effect...14550 13650 11750.
Chance of snow showers early Tuesday afternoon. Waves 8 to 11
feet occasionally to 14 feet building to 12 to 16 feet
occasionally to 21 feet tonight. Waves 10 to 14 feet occasionally
to 18 feet subsiding to 6 to 9 feet occasionally to 12 feet
Tuesday.

MICHIGAN SOUTH...Gale Warning in effect...14550 11550 12650
11740. Waves 8 to 12 feet occasionally to 16 feet building to 12
to 16 feet occasionally to 21 feet tonight. Waves 10 to 14 feet
occasionally to 18 feet subsiding to 7 to 10 feet occasionally to
13 feet Tuesday.

$$


Rodriguez

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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