Great Lakes Forecast
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000
FZUS63 KLOT 131530
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
930 AM 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...Strong, arctic high pressure of 30.9 inches over the
Northern Plains will move southeast through the Midwest tonight,
while gradually weakening to 30.7 inches. The high 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 30.3 inches. Another strong high pressure of 40.0
inches will push south across the Plains, weakening to 30.7 inches
and reaching the lower Missouri Valley by Wednesday morning.

LMZ261-362-364-366-563-565-567-868-132215-
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-
930 AM CST Sat Jan 13 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

.REST OF TODAY...Northwest winds to 30 kt diminishing to 15 to
25 kt. Freezing spray late this morning. Chance of snow late this
morning...then slight chance of snow this afternoon. Waves 4 to
7 ft occasionally to 9 ft subsiding to 3 to 5 ft.
.TONIGHT...Northwest winds 10 to 20 kt becoming west. Waves
subsiding to 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt
late in the morning...then increasing to 30 kt early in the
afternoon becoming south late. Chance of snow in the afternoon.
Waves 2 to 4 ft building to 4 to 7 ft occasionally to 9 ft.
.SUNDAY NIGHT...South winds to 30 kt. Snow. Waves 6 to 9 ft
occasionally to 12 ft.
.MONDAY...South winds to 30 kt becoming southeast 15 to 25 kt.
Snow likely. Waves 5 to 8 ft occasionally to 10 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. Chance of snow. Waves 4 to 6 ft
occasionally to 8 ft.
.WEDNESDAY...West winds to 30 kt. Waves 4 to 6 ft occasionally to
8 ft building to 5 to 8 ft occasionally to 10 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-132215-
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-
930 AM CST Sat Jan 13 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.REST OF TODAY...Northwest winds to 30 kt diminishing to 15 to
25 kt. Freezing spray late this morning. Chance of snow. Waves
6 to 9 ft occasionally to 12 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.TONIGHT...Northwest winds 10 to 20 kt becoming west 10 to 15 kt.
Chance of snow. Waves 4 to 6 feet occasionally to 8 feet subsiding
to 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt
and becoming southwest 15 to 25 kt by early afternoon, then
becoming south to 30 kt late. Waves 2 to 4 ft building to 4 to 6
ft occasionally to 8 ft.
.SUNDAY NIGHT...South winds to 30 kt. Snow. Freezing spray
overnight. Waves 6 to 9 ft occasionally to 12 ft.
.MONDAY...Southwest winds to 30 kt becoming west. Snow in the
morning...then chance of snow in the afternoon. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.MONDAY NIGHT...Northwest winds to 30 kt. Freezing spray. Chance
of snow. Waves 4 to 7 ft occasionally to 9 ft.
.TUESDAY...Northwest winds to 30 kt. Chance of snow. Waves 4 to
7 ft occasionally to 9 ft.
.WEDNESDAY...West winds 15 to 25 kt increasing to 30 kt. Waves
2 to 4 ft building to 4 to 6 ft occasionally to 8 ft.

$$
LMZ761-132215-
MAFOR 1316/
MICHIGAN NORTH 13730 11720 11620 12610 11520. Chance of snow late
this morning. Waves 4 to 7 feet occasionally to 9 feet subsiding
to 3 to 5 feet today. Waves 2 to 4 feet tonight and Sunday
morning.

MICHIGAN SOUTH 13730 12710 12610 11520. Chance of snow today and
tonight. Waves 6 to 9 feet occasionally to 12 feet subsiding to 4
to 7 feet occasionally to 9 feet today. Waves 4 to 6 feet
occasionally to 8 feet subsiding to 2 to 4 feet tonight. Waves 2
to 4 feet Sunday morning.

$$

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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