Great Lakes Forecast
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000
FZUS63 KLOT 240209
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
809 PM CST Fri Feb 23 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...Weak low pressure of 29.9 inches over Quebec will
dissipate as it shifts northeast. High pressure of 30.4 inches
over the northern Plains will move across the northern lakes
Saturday morning. Low pressure of 29.7 inches will develop over
the Southern Plains tonight...deepen rapidly...then lift across
Lake Superior Sunday at 29.0 inches. A 30.2 inch high will build
over the Central Plains Monday and move to the upper Ohio Valley
Tuesday.

LMZ261-362-364-366-563-565-567-868-241030-
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-
809 PM CST Fri Feb 23 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WATCH IN EFFECT FROM SATURDAY EVENING THROUGH LATE SUNDAY
NIGHT...

.REST OF TONIGHT...Northwest winds 10 to 20 kt becoming north 5
to 10 kt late. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SATURDAY...Northeast winds 10 to 20 kt becoming east in the
early afternoon...then increasing to 15 to 25 kt late in the
afternoon. Waves 1 to 3 ft building to 3 to 5 ft late.
.SATURDAY NIGHT...East winds to 30 kt becoming southeast gales
to 35 kt in the evening...then shifting to southwest gales to 45
kt toward morning. Rain. A chance of snow in the evening. Waves
4 to 6 ft occasionally to 8 ft building to 7 to 10 ft
occasionally to 13 ft.
.SUNDAY...Southwest gales to 45 kt diminishing to gales to 40 kt.
Chance of rain in the morning. Waves 10 to 14 ft occasionally to
18 ft.
.SUNDAY NIGHT...Southwest gales to 35 kt becoming west to 30 kt.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 5 to 8 ft
occasionally to 10 ft.
.MONDAY...Southwest winds 10 to 20 kt increasing to 15 to 25 kt.
Waves 3 to 5 ft.
.MONDAY NIGHT...Southwest winds to 30 kt. Waves 4 to 7 ft
occasionally to 9 ft.
.TUESDAY...Southwest winds 10 to 20 kt becoming south 10 to 15
kt. Waves 3 to 5 ft subsiding to 1 to 3 ft.
.WEDNESDAY...Northeast winds 10 to 20 kt becoming east. Waves 2
to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-241030-
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-
809 PM CST Fri Feb 23 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

...GALE WATCH IN EFFECT FROM SATURDAY EVENING THROUGH LATE SUNDAY
NIGHT...

.REST OF TONIGHT...Northwest winds 10 to 20 kt veering to
northeast. Waves 3 to 5 ft subsiding to 2 to 4 ft.
.SATURDAY...East winds 10 to 20 kt increasing to 30 kt late in
the afternoon. Slight chance of snow. Chance of rain in the
afternoon. Waves 2 to 4 ft building to 3 to 5 ft.
.SATURDAY NIGHT...Southeast gales to 40 kt becoming south late
in the evening...then southwest gales to 45 kt overnight. Rain.
Waves 6 to 9 ft occasionally to 12 ft.
.SUNDAY...Southwest gales to 45 kt diminishing to 30 kt in the
afternoon. Waves 8 to 12 ft occasionally to 16 ft subsiding to
8 to 11 ft occasionally to 14 ft.
.SUNDAY NIGHT...Southwest winds to 30 kt becoming west. Waves
5 to 8 ft occasionally to 10 ft subsiding to 4 to 6 ft
occasionally to 8 ft.
.MONDAY...Southwest winds 10 to 20 kt. Waves 2 to 4 ft.
.MONDAY NIGHT...Southwest winds 15 to 25 kt. Waves 3 to 5 ft.
.TUESDAY...Southwest winds 10 to 15 kt becoming south 10 to 20
kt. Waves 2 to 4 ft.
.WEDNESDAY...South winds 10 to 20 kt becoming east. Waves 1 to
3 ft.

$$
LMZ761-241030-
MAFOR 2404/
MICHIGAN NORTH 11720 11710 11800 11120 12220 11230 11240. Chance
of rain and snow Saturday evening. Waves 3 to 5 ft subsiding to 2
to 4 ft overnight. Waves 1 to 3 ft building to 3 to 5 ft Saturday.
Waves 4 to 6 ft occasionally to 8 ft Saturday evening.

MICHIGAN SOUTH 11720 11820 11120 12220 11230 11240 11356. Waves 3
to 5 ft subsiding to 2 to 4 ft overnight. Waves 2 to 4 ft
building to 3 to 5 ft Saturday. Waves 6 to 9 ft occasionally to 12
ft Saturday evening.

$$


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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