Great Lakes Forecast
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000
FZUS63 KLOT 180238
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
838 PM CST Wed Jan 17 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 high pressure of 30.8 inches centered over
the lower Mississippi Valley will drift across the Deep South
through the weekend. Meanwhile, low pressure of 29.6 inches over
Hudson Bay will move across northern Quebec tonight. Another low
of 29.3 inches will move from Alberta Thursday to James Bay Friday
night. Yet another low of 29.5 inches developing over the South
High Plains will move across the central plains Sunday and then
continue to northern Lake Michigan Monday night or early Tuesday.

LMZ261-362-364-366-563-565-567-868-181030-
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-
838 PM CST Wed Jan 17 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT UNTIL 3 AM CST THURSDAY...

.REST OF TONIGHT...Southwest gales to 40 kt becoming west to 30
kt overnight. Waves 10 to 14 ft occasionally to 18 ft subsiding
to 7 to 10 ft occasionally to 13 ft.
.THURSDAY...West winds 20 to 25 kt becoming southwest. Slight
chance of snow showers in the afternoon. Waves 4 to 7 ft
occasionally to 9 ft.
.THURSDAY NIGHT...West winds 15 to 25 kt becoming southwest 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 3 to
5 ft.
.FRIDAY...Southwest winds to 30 kt increasing to gales to 35 kt.
Waves 4 to 7 ft occasionally to 9 ft building to 7 to 10 ft
occasionally to 13 ft.
.FRIDAY NIGHT...Southwest gales to 40 kt diminishing to 30 kt
overnight. Waves 8 to 11 ft occasionally to 14 ft.
.SATURDAY...Southwest winds 10 to 20 kt. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt becoming west 10 to
15 kt. Waves 2 to 4 ft.
.SUNDAY...East winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of rain and snow. Waves 1 to 3 ft.
.MONDAY...Southeast winds to 30 kt diminishing to 15 to 25 kt.
Rain and snow. Waves 6 to 9 ft occasionally to 12 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-181030-
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-
838 PM CST Wed Jan 17 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT UNTIL 3 AM CST THURSDAY...

.REST OF TONIGHT...Southwest gales to 40 kt becoming west to 30
kt overnight. Freezing spray. Waves 8 to 11 ft occasionally to 14
ft.
.THURSDAY...Southwest winds to 30 kt. Waves 6 to 9 ft
occasionally to 12 ft.
.THURSDAY NIGHT...West winds to 30 kt becoming southwest 10 to
20 kt. Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.FRIDAY...Southwest winds to 30 kt increasing to gales to 35 kt.
Waves 4 to 6 ft occasionally to 8 ft building to 5 to 8 ft
occasionally to 10 ft.
.FRIDAY NIGHT...Southwest gales to 35 kt diminishing to 30 kt.
Waves 6 to 9 ft occasionally to 12 ft.
.SATURDAY...Southwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 3 to
5 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt. Chance of rain.
Waves 2 to 4 ft.
.SUNDAY...South winds 10 to 15 kt increasing to 10 to 20 kt.
Chance of rain. Waves 2 to 4 ft.
.MONDAY...South winds 15 to 25 kt. Rain likely. Waves 6 to 9 ft
occasionally to 12 ft.

$$
LMZ761-181030-
MAFOR 1804/
MICHIGAN NORTH...Gale Warning in effect...11550 11640 19650 11640
11630 12530 12630. Waves 10 to 14 ft occasionally to 18 ft subsiding
to 7 to 10 ft occasionally to 13 ft overnight. Waves 4 to 7 ft
occasionally to 9 ft Thursday. Waves 4 to 6 ft occasionally to 8
ft Thursday evening.

MICHIGAN SOUTH...Gale Warning in effect...11550 11650 11640 14540
11640. Waves 8 to 11 ft occasionally to 14 ft overnight. Waves 6
to 9 ft occasionally to 12 ft Thursday and Thursday evening.

$$


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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