Great Lakes Forecast
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000
FZUS63 KLOT 140212
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
812 PM CST Sat Jan 13 2018

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 30.7 inches over the Ohio Valley
tonight will then become elongated from the Upper Ohio Valley to
New England Sunday, as low pressure of 30.1 inches drops southeast
from Manitoba. This low will move to southern Wisconsin by Monday
morning, slowing as it drifts east across the lake during the
day. The low will continue east to Lake Huron by early Tuesday,
filling slightly to 30.2 inches. Another strong high pressure of
30.9 inches will push south across the Plains, weakening to 30.7
inches as it reaches the lower Missouri Valley by Wednesday
morning. The high will weaken further to 30.4 inches over the
southeast USA late week.

LMZ261-362-364-366-563-565-567-868-141030-
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-
812 PM CST Sat Jan 13 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TONIGHT...West winds 10 to 20 kt. Chance of snow
showers. Waves 2 to 4 ft subsiding to 1 to 3 ft overnight.
.SUNDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt
late in the morning...then increasing to south winds to 30 kt
through the afternoon. Chance of snow showers in the
morning...then chance of snow in the afternoon. Waves building to
5 to 8 ft occasionally to 10 ft.
.SUNDAY NIGHT...South winds to 30 kt. Occasional gales to 35 kt.
Freezing spray. Snow. Waves 6 to 9 ft occasionally to 12 ft
building to 8 to 11 ft occasionally to 14 ft.
.MONDAY...Southeast winds to 30 kt diminishing to 10 to 20 kt in
the afternoon. Freezing spray in the morning. Snow likely. Waves
6 to 9 ft occasionally to 12 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.MONDAY NIGHT...Northeast winds 10 to 20 kt increasing to 30 kt
overnight. Chance of snow. Waves 3 to 5 ft.
.TUESDAY...North winds to 30 kt diminishing to 15 to 25 kt.
Chance of snow in the morning. Waves 4 to 6 ft occasionally to
8 ft.
.TUESDAY NIGHT...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Chance of snow. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 5 ft.
.WEDNESDAY...West winds to 30 kt. Waves 3 to 5 ft building to
4 to 7 ft occasionally to 9 ft.
.THURSDAY...West winds to 30 kt becoming southwest. Waves 4 to
7 ft occasionally to 9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-141030-
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-
812 PM CST Sat Jan 13 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TONIGHT...Northwest winds 10 to 15 kt backing to
southwest. Chance of snow showers. Waves 3 to 5 ft subsiding to 2
to 4 ft overnight.
.SUNDAY...Southwest winds 10 to 20 kt becoming south to 30 kt.
Chance of snow showers in the morning...then slight chance of
snow in the afternoon. Waves building to 5 to 8 ft occasionally
to 10 ft.
.SUNDAY NIGHT...South winds to 30 kt. Occasional gales to 35 kt.
Freezing spray. Snow. Waves 6 to 9 ft occasionally to 12 ft
building to 8 to 11 ft occasionally to 14 ft.
.MONDAY...Southwest winds to 30 kt becoming west. Snow in the
morning...then chance of snow in the afternoon. Waves 6 to 9 ft
occasionally to 12 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.MONDAY NIGHT...West winds to 30 kt becoming northwest. Freezing
spray. Chance of snow. Waves 4 to 6 ft occasionally to 8 ft.
.TUESDAY...Northwest winds to 30 kt becoming north. Freezing
spray in the morning. Chance of snow. Waves 4 to 6 ft
occasionally to 8 ft.
.TUESDAY NIGHT...Northwest winds 15 to 25 kt. Chance of snow.
Waves 4 to 6 ft occasionally to 8 ft.
.WEDNESDAY...West winds 15 to 25 kt increasing to 30 kt. Chance
of snow. Waves 3 to 5 ft building to 4 to 6 ft occasionally to
8 ft.
.THURSDAY...West winds to 30 kt becoming southwest. Waves 5 to
8 ft occasionally to 10 ft.

$$
LMZ761-141030-
MAFOR 1404/
MICHIGAN NORTH 11720 12620 11520 11530 11540 11440 11447 19457.
Chance of snow showers overnight and Sunday. Waves 2 to 4 ft
overnight building to 5 to 8 ft occasionally to 10 ft Sunday.
Waves 7 to 10 ft occasionally to 13 ft Sunday evening.

MICHIGAN SOUTH 11710 11610 11510 11520 11530 11440 12447. Chance
of snow showers overnight into Saturday morning east half. Waves
3 to 5 ft occasionally to 7 ft subsiding to 2 to 4 ft overnight.
Waves 2 to 4 ft building to 5 to 8 ft occasionally to 10 ft
Sunday. Waves 7 to 10 ft occasionally to 13 ft Sunday evening.

$$

KMD

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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