Great Lakes Forecast
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000
FZUS63 KLOT 181948
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
248 PM CDT Wed Oct 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...Expansive high pressure of 30.4 inches will remain
over the eastern Ohio Valley and mid Atlantic Coast through
Friday. A strong low averaging 28.8 inches will take an eastward
track across northern Manitoba to Hudson Bay by Thursday. The cold
front trailing from this low will move across the lake tonight
into Thursday. Another strong low pressure area will move across
the Canadian Prairies on Friday and Saturday...and to Hudson Bay
on Sunday, with its trailing cold front crossing the lake over the
weekend.

LMZ261-362-364-366-563-565-567-669-868-870-190330-
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 Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
248 PM CDT Wed Oct 18 2017

PORT WASHINGTON WI TO WHITEHALL MI NORTH...

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

.TONIGHT...Southwest gales to 45 kt becoming west to 30 kt after
midnight...then diminishing to 15 to 25 kt late. Waves 12 to
16 ft occasionally to 21 ft subsiding to 6 to 9 ft occasionally
to 12 ft.
.THURSDAY...West winds 15 to 25 kt becoming southwest. Waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.THURSDAY NIGHT...Southwest winds 10 to 20 kt. Waves 3 to 5 ft.
.FRIDAY...South winds 15 to 25 kt increasing to 30 kt. Waves 3 to
5 ft building to 4 to 7 ft occasionally to 9 ft.
.FRIDAY NIGHT...South winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.SATURDAY...South winds to 30 kt. Waves 6 to 9 ft occasionally to
12 ft.
.SATURDAY NIGHT...South winds to 30 kt. Chance of showers. Waves
6 to 9 ft occasionally to 12 ft.
.SUNDAY...Southwest winds to 30 kt. Showers likely. Waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft.
.MONDAY...South winds to 30 kt. Chance of showers. Waves 4 to
7 ft occasionally to 9 ft.

$$

LMZ080-671-673-675-777-779-872-874-876-878-190330-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
248 PM CDT Wed Oct 18 2017

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

.TONIGHT...Southwest winds to 30 kt becoming west 15 to 25 kt.
Occasional gale force gusts to 35 kt in the evening. Waves 7 to
10 ft occasionally to 13 ft subsiding to 5 to 8 ft occasionally to
10 ft.
.THURSDAY...Northwest winds 10 to 20 kt becoming southwest 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 2 to
4 ft.
.THURSDAY NIGHT...South winds 10 to 15 kt increasing to 10 to
20 kt. Waves 1 to 3 ft.
.FRIDAY...South winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft.
.FRIDAY NIGHT...South winds 15 to 25 kt increasing to 30 kt.
Waves 3 to 5 ft building to 4 to 6 ft occasionally to 8 ft.
.SATURDAY...South winds to 30 kt. Waves 4 to 7 ft occasionally to
9 ft.
.SATURDAY NIGHT...South winds to 30 kt. Chance of showers. Waves
5 to 8 ft occasionally to 10 ft.
.SUNDAY...South winds to 30 kt becoming west. Chance of showers.
Waves 5 to 8 ft occasionally to 10 ft.
.MONDAY...South winds to 30 kt. Chance of showers. Waves 4 to
7 ft occasionally to 9 ft.

$$

LMZ761-190330-
MAFOR 1821/
MICHIGAN NORTH...Gale Warning in effect...11460 12550 11640
14630. Waves 12 to 16 feet occasionally to 21 feet subsiding to 6
to 9 feet occasionally to 12 feet tonight. Waves 4 to 7 feet
occasionally to 9 feet Thursday.

MICHIGAN SOUTH 11440 12540 11530 11630 12720 11610. Waves 7 to 10
feet occasionally to 13 feet subsiding to 5 to 8 feet
occasionally to 10 feet tonight. Waves 4 to 6 feet occasionally to
8 feet subsiding to 2 to 4 feet Thursday.

$$


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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