Great Lakes Forecast
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000
FZUS63 KLOT 181438
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
838 AM CST Sun Feb 18 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 30.4 inches over the Ohio Valley
will move to the mid-Atlantic coast by this evening. Low pressure
of 29.5 inches will move from the High Plains to the northern
Lakes by evening. This low will drag a cold front across central
Lake Michigan by early Monday. A series of weaker low pressure
waves will ripple along the cold front through Tuesday before the
cold front drifts off to the southeast Tuesday night. Strong high
pressure of 30.7 inches will build in behind the front Wednesday,
and weaker ridging will linger across the western Lakes Thursday.

LMZ261-362-364-366-563-565-567-868-182245-
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 AM CST Sun Feb 18 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT FROM NOON CST TODAY THROUGH THIS
EVENING...

.REST OF TODAY...South winds to 30 kt increasing to gales to 40
kt. Chance of snow this afternoon. Waves 2 to 4 ft building to 10
to 14 ft occasionally to 18 ft.
.TONIGHT...South gales to 40 kt becoming southwest and diminishing
to 15 to 25 kt. Waves 10 to 14 ft occasionally to 18 ft subsiding
to 7 to 10 ft occasionally to 13 ft.
.MONDAY...West winds 10 to 20 kt veering to northeast late in the
morning...then increasing to 15 to 25 kt early in the afternoon
and to 30 kt late. Chance of snow and rain showers in the morning...
then a mix of snow, rain and sleet in the afternoon. Waves 5 to
8 ft occasionally to 10 ft.
.MONDAY NIGHT...Northeast winds to 30 kt diminishing to 10 to
20 kt overnight. Rain, snow and sleet likely. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 7 ft occasionally to 9 ft.
.TUESDAY...Northeast winds 10 to 20 kt diminishing to 10 to
15 kt. Rain and freezing rain likely. Waves 3 to 5 ft subsiding
to 2 to 4 ft.
.TUESDAY NIGHT...North winds 10 to 20 kt becoming northwest.
Chance of light freezing rain and light sleet. Waves 2 to 4 ft
building to 3 to 5 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt. Waves 3 to 5 ft.
.THURSDAY...Northeast winds 5 to 10 kt becoming north. Waves 1 to
2 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-182245-
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 AM CST Sun Feb 18 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WARNING IN EFFECT FROM NOON CST TODAY THROUGH THIS
EVENING...

.REST OF TODAY...South winds to 30 kt increasing to gales to 40
kt. Waves 2 to 4 ft building to 10 to 14 ft occasionally to 18
ft.
.TONIGHT...South gales to 35 kt diminishing to 10 to 20 kt.
Slight chance of rain showers overnight. Waves 8 to 12 ft
occasionally to 16 ft subsiding to 5 to 8 ft occasionally to
10 ft.
.MONDAY...South winds 10 to 20 kt becoming southeast to 30 kt.
Rain showers. Waves 4 to 6 ft occasionally to 8 ft building to 4
to 7 ft occasionally to 9 ft.
.MONDAY NIGHT...South winds to 30 kt becoming southeast 15 to
25 kt. Rain showers with a chance of thunderstorms in the
evening...then rain showers overnight. Waves 5 to 8 ft
occasionally to 10 ft subsiding to 4 to 7 ft occasionally to
9 ft.
.TUESDAY...South winds 15 to 25 kt becoming southwest. Rain
showers. Waves 3 to 5 ft.
.TUESDAY NIGHT...West winds 15 to 25 kt becoming northwest. Rain
likely, with a chance of light freezing rain and light sleet.
Waves 2 to 4 ft building to 3 to 5 ft.
.WEDNESDAY...Northwest winds 15 to 25 kt becoming north 10 to
20 kt. Waves 4 to 6 ft occasionally to 8 ft.
.THURSDAY...Northeast winds 10 to 15 kt. Waves 2 to 4 ft.

$$
LMZ761-182245-
MAFOR 1816/
MICHIGAN NORTH...Gale Warning in effect...11440 14450 11540 11530
11620. Chance of snow this afternoon. Chance of snow and rain
showers Monday morning. Waves 2 to 4 ft building to 10 to 14 ft
occasionally to 18 ft today. Waves 10 to 14 ft occasionally to 18
ft subsiding to 7 to 10 ft occasionally to 13 ft tonight. Waves 5
to 8 ft occasionally to 10 ft Monday morning.

MICHIGAN SOUTH...Gale Warning in effect...11440 13450 11440 11430
12426. Waves 2 to 4 ft building to 10 to 14 ft occasionally to 18
ft today. Waves 8 to 12 ft occasionally to 16 ft subsiding to 5 to
8 ft occasionally to 10 ft tonight. Waves 4 to 6 ft occasionally
to 8 ft Monday morning.

$$


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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