Great Lakes Forecast
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084
FZUS63 KLOT 190748
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
248 AM CDT Thu Oct 19 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 Hudson Bay today. The cold front trailing from this
low will move across the lake early this morning. 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 by Sunday.

LMZ261-362-364-366-563-565-567-669-868-870-191530-
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 AM CDT Thu Oct 19 2017

PORT WASHINGTON WI TO WHITEHALL MI NORTH...

.TODAY...Southwest winds to 30 kt becoming west 15 to 25 kt this
morning, then becoming southwest 10 to 20 kt this afternoon.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.TONIGHT...Southwest winds 10 to 20 kt. Waves 3 to 5 ft.
.FRIDAY...Southwest winds 15 to 25 kt becoming south to 30 kt.
Waves 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 7 to 10 ft occasionally
to 13 ft.
.SATURDAY NIGHT...South winds to 30 kt. Chance of showers. Waves
7 to 10 ft occasionally to 13 ft.
.SUNDAY...South winds to 30 kt becoming southwest. Showers
likely. Waves 5 to 8 ft occasionally to 10 ft.
.MONDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of showers. Waves 2 to 4 ft.

$$

LMZ080-671-673-675-777-779-872-874-876-878-191530-
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 AM CDT Thu Oct 19 2017

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

.TODAY...Southwest winds 15 to 25 kt becoming northwest 10 to 20
kt this morning, then backing to southwest this afternoon. Waves
4 to 7 ft occasionally to 9 ft subsiding to 2 to 4 ft.
.TONIGHT...South winds 10 to 20 kt. Waves 2 to 4 ft.
.FRIDAY...South winds 10 to 20 kt. Waves 2 to 4 ft.
.FRIDAY NIGHT...South winds 15 to 25 kt. Waves 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 southwest. Showers
likely. Waves 5 to 8 ft occasionally to 10 ft.
.MONDAY...Southwest winds 10 to 20 kt. Chance of showers. Waves
1 to 3 ft.

$$

LMZ761-191530-
MAFOR 1909/
MICHIGAN NORTH 11540 13630 14520. Waves 7 to 10 feet occasionally
to 13 feet subsiding to 4 to 6 feet occasionally to 8 feet today.
Waves 3 to 5 feet tonight.

MICHIGAN SOUTH 11530 19620 11720 12620 11510 13420. Waves 4 to 7
feet occasionally to 9 feet subsiding to 2 to 4 feet today and
tonight.

$$


KJB

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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