Great Lakes Forecast
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FZUS63 KLOT 182031 CCA
GLFLM

OPEN LAKE FORECAST for Lake Michigan...CORRECTED
National Weather Service Chicago/Romeoville IL
231 PM CST Mon Dec 18 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...Low pressure of 29.0 inches over northwest Manitoba
will move across Hudson Bay Tuesday morning as it`s cold front
moves across Lake Michigan. A ridge of high pressure averaging
30.3 inches over the Northern Plains Tuesday morning will become
centered over the Great Lakes by Wednesday afternoon. Meanwhile,
Wednesday evening, new low pressure of 29.5 inches will develop
over the central High Plains. This low will track to northern
Illinois by Friday morning at 29.7 inches and then reach southern
Quebec Saturday.

LMZ261-362-364-366-563-565-567-868-190430-
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-
231 PM CST Mon Dec 18 2017

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM 9 PM CST THIS EVENING THROUGH
TUESDAY EVENING...

.TONIGHT...Southwest winds 15 to 25 kt increasing to gales to 35
kt, and then becoming west after midnight. Chance of rain
showers. Waves 5 to 8 ft occasionally to 10 ft building to 8 to 11
ft occasionally to 14 ft.
.TUESDAY...West winds to 30 kt increasing to gales to 35 kt.
Slight chance of rain in the morning. Waves 7 to10 ft
occasionally to 13 ft.
.TUESDAY NIGHT...Northwest gales to 35 kt diminishing to 30 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt becoming north 10 to
15 kt in the afternoon. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.WEDNESDAY NIGHT...Northeast winds 10 to 15 kt becoming southeast
10 to 20 kt. Chance of snow overnight. Waves 1 to 2 ft.
.THURSDAY...Southeast winds 10 to 20 kt. Snow likely. Waves 2 to
4 ft.
.THURSDAY NIGHT...East winds 10 to 20 kt increasing to 30 kt
overnight. Snow likely. Waves 3 to 5 ft.
.FRIDAY...East winds to 30 kt diminishing to 15 to 25 kt. Snow
and rain. Waves 4 to 6 ft occasionally to 8 ft.
.SATURDAY...Northwest winds to 30 kt. Chance of snow. Waves 4 to
6 ft occasionally to 8 ft building to 4 to 7 ft occasionally to
9 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-190430-
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-
231 PM CST Mon Dec 18 2017

SHEBOYGAN WI TO PENTWATER MI SOUTH...

.TONIGHT...Southwest winds to 30 kt. Waves 4 to 6 ft occasionally
to 8 ft building to 7 to 10 ft occasionally to 13 ft.
.TUESDAY...West winds to 30 kt. Occasional gale force gusts to 35
kt are possible late. Waves 6 to 9 ft occasionally to 12 ft.
.TUESDAY NIGHT...West winds to 30 kt becoming northwest.
Occasional gale force gusts to 35 kt are possible in the evening.
Waves 5 to 8 ft occasionally to 10 ft subsiding to 4 to 7 ft
occasionally to 9 ft.
.WEDNESDAY...North winds 15 to 25 kt diminishing to 10 to 15 kt
in the afternoon. Waves 4 to 6 ft occasionally to 8 ft subsiding
to 2 to 4 ft.
.WEDNESDAY NIGHT...East winds 10 to 15 kt becoming southeast
10 to 20 kt. Waves 1 to 3 ft.
.THURSDAY...Southeast winds 10 to 20 kt. Chance of snow in the
morning...then chance of rain and snow in the afternoon. Waves
2 to 4 ft.
.THURSDAY NIGHT...Southeast winds 15 to 25 kt. Chance of rain and
snow. Waves 3 to 5 ft.
.FRIDAY...Southeast winds 15 to 25 kt. Rain likely. Waves 3 to
5 ft.
.SATURDAY...Northwest winds to 30 kt becoming west. Chance of
snow. Waves 4 to 7 ft occasionally to 9 ft building to 5 to 8 ft
occasionally to 10 ft.

$$

LMZ761-190430-
MAFOR 1822/
MICHIGAN NORTH...Gale Warning in effect...11530 11540 11550 12650
12640 11650. Chance of rain showers tonight. Waves 5 to 8 feet
occasionally to 10 feet building to 8 to 11 feet occasionally to
14 feet tonight. Waves 7 to 10 feet occasionally to 13 feet
Tuesday.


MICHIGAN SOUTH 11530 13540 14640. Waves 4 to 6 feet occasionally
to 8 feet building to 7 to 10 feet occasionally to 13 feet
tonight. Waves 6 to 9 feet occasionally to 12 feet Tuesday.

$$


JEE

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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