Great Lakes Forecast
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000
FZUS63 KLOT 112050
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
250 PM CST Thu Jan 11 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...Low pressure of 29.6 inches near the Straights of
Mackinac will move to Georgian Bay tonight and to western Quebec
by daybreak Friday. An associated sharp cold will move across
Lake Michigan late this afternoon and early evening. High
pressure of 30.8 inches will then build from the plains into the
Upper Midwest Friday into Saturday. Meanwhile... low pressure of
29.4 inches will organize over the middle Appalachian states. The
plains high pressure area will move into the Great Lakes region
on Sunday. A clipper like low pressure at 30.1 inches will quickly
follow Sunday night crossing southern Lake Michigan Monday.

LMZ261-362-364-366-563-565-567-868-120515-
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-
250 PM CST Thu Jan 11 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM 6 PM CST THIS EVENING THROUGH LATE
FRIDAY NIGHT...

.TONIGHT...Northwest wind 15 to 25 kt increasing to gales to 35
kt early this evening... then becoming north overnight. Freezing
spray. Rain with sleet and freezing rain likely this
evening...then chance of snow overnight. Waves building to 8 to 11
ft occasionally to 14 ft.
.FRIDAY...North gales to 35 kt. Freezing spray. Slight chance of
snow showers. Waves 8 to 11 ft occasionally to 14 ft.
.FRIDAY NIGHT...North gales to 35 kt diminishing to 30 kt.
Freezing spray. Chance of snow showers. Waves subsiding to 7 to
10 ft occasionally to 13 ft.
.SATURDAY...North winds to 30 kt becoming northwest 15 to 25 kt.
Freezing spray in the morning. Chance of snow showers. Waves 5 to
8 ft occasionally to 10 ft subsiding to 4 to 6 ft occasionally to
8 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt becoming west 10 to
15 kt. Chance of snow showers. Waves 2 to 4 ft subsiding to 1 to
3 ft.
.SUNDAY...Southwest winds 10 to 20 kt increasing to 30 kt in the
afternoon. Chance of snow showers. Waves 1 to 2 ft building to
3 to 5 ft.
.SUNDAY NIGHT...South winds to 30 kt. Snow likely. Waves 5 to
8 ft occasionally to 10 ft.
.MONDAY...Southeast winds 15 to 25 kt becoming northeast 10 to
20 kt. Snow likely. Waves 4 to 7 ft occasionally to 9 ft
subsiding to 3 to 5 ft.
.TUESDAY...Northeast winds to 30 kt becoming north. Chance of
snow. Waves 6 to 9 ft occasionally to 12 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-120515-
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-
250 PM CST Thu Jan 11 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT FROM 6 PM CST THIS EVENING THROUGH LATE
FRIDAY NIGHT...

.TONIGHT...Southwest winds to 30 kt becoming northwest this
evening... then becoming north gales to 35 kt by late evening.
Rain likely, chance of freezing rain, snow and sleet this
evening...then chance of snow overnight. Freezing spray overnight.
Waves 6 to 9 ft occasionally to 12 ft building to 10 to 14 ft
occasionally to 18 ft.
.FRIDAY...North gales to 35 kt. Freezing spray. Slight chance of
snow showers in the morning...then chance of snow showers in the
afternoon. Waves 10 to 14 ft occasionally to 18 ft.
.FRIDAY NIGHT...North gales to 40 kt diminishing to 30 kt.
Freezing spray. Chance of snow showers. Waves 10 to 14 ft
occasionally to 18 ft.
.SATURDAY...North winds to 30 kt becoming northwest 15 to 25 kt.
Freezing spray. Chance of snow showers. Waves 8 to 11 ft
occasionally to 14 ft subsiding to 5 to 8 ft occasionally to
10 ft.
.SATURDAY NIGHT...Northwest winds 10 to 20 kt diminishing to
10 to 15 kt. Chance of snow showers. Waves 4 to 6 ft occasionally
to 8 ft subsiding to 2 to 4 ft.
.SUNDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt.
Chance of flurries in the afternoon. Waves 2 to 4 ft building to
3 to 5 ft.
.SUNDAY NIGHT...South winds to 30 kt. Snow. Waves 5 to 8 ft
occasionally to 10 ft.
.MONDAY...Southwest winds 15 to 25 kt becoming northwest. Chance
of snow. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.TUESDAY...North winds to 30 kt. Chance of snow. Waves 6 to 9 ft
occasionally to 12 ft.

$$

LMZ761-120515-
MAFOR 1122/
MICHIGAN NORTH...Gale Warning in effect...11756 11750 14850
12840. Chance of light freezing rain early this evening,...Then
chance of snow tonight. Waves 4 to 7 feet occasionally to 9 feet
building to 8 to 11 feet occasionally to 14 feet tonight. Waves 8
to 11 feet occasionally to 14 feet Friday.

MICHIGAN SOUTH...Gale Warning in effect...11646 11746 11750 14850
11840. Chance of light freezing rain, snow and light sleet this
evening. Chance of snow after midnight tonight. Chance of snow
showers early Friday afternoon. Waves 4 to 7 feet occasionally to
9 feet building to 10 to 14 feet occasionally to 18 feet tonight.
Waves 10 to 14 feet occasionally to 18 feet Friday.

$$

Ed F

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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