Great Lakes Forecast
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107
FZUS63 KLOT 200304
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
904 PM CST Fri Jan 19 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...A weak cold front will move over the northern part of
the lake overnight, then weak high pressure of 29.9 inches will
prevail over the lake Saturday into early Sunday. Low pressure of
29.5 inches will develop across the central Plains Sunday
afternoon. As this moves northeast and deepens to 29.4 inches, a
warm front will lift northward across the lake on Monday. The low
will pass across the the lake on Monday night at 29.3 inches and
then continue onward to Quebec Tuesday. High pressure of 30.4
inches will return over the lake mid week.

LMZ261-362-364-366-563-565-567-868-201045-
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-
904 PM CST Fri Jan 19 2018

SHEBOYGAN WI TO PENTWATER MI NORTH...

...GALE WARNING IN EFFECT UNTIL MIDNIGHT CST TONIGHT...

.REST OF TONIGHT...Southwest gales to 35 kt becoming west to
30 kt after midnight...then diminishing to 15 to 25 kt late.
Waves 7 to 10 ft occasionally to 13 ft subsiding to 6 to 9 ft
occasionally to 12 ft.
.SATURDAY...West winds 10 to 20 kt becoming southwest 10 to
15 kt. Waves 4 to 6 ft occasionally to 8 ft subsiding to 1 to
3 ft.
.SATURDAY NIGHT...Southwest winds 10 to 15 kt becoming south 5 to
10 kt. Waves 1 to 2 ft.
.SUNDAY...Southeast winds 5 to 10 kt becoming east 10 to 20 kt in
the afternoon. Waves 1 to 2 ft.
.SUNDAY NIGHT...East winds 10 to 20 kt increasing to 30 kt
overnight. Chance of snow and rain in the evening...then rain
with snow likely overnight. Waves 2 to 4 ft building to 4 to 6 ft
occasionally to 8 ft.
.MONDAY...East gales to 40 kt diminishing to gales to 35 kt.
Rain, light sleet and snow in the morning...then rain, snow and
sleet in the afternoon. Waves 7 to 10 ft occasionally to 13 ft.
.MONDAY NIGHT...East winds to 30 kt becoming northeast. Snow and
freezing rain with rain likely. Waves 5 to 8 ft occasionally to
10 ft.
.TUESDAY...North gales to 35 kt becoming northwest to 30 kt.
Chance of snow. Waves 6 to 9 ft occasionally to 12 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt. Waves 2 to 4 ft.

$$

LMZ080-669-671-673-675-777-779-870-872-874-876-878-201045-
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-
904 PM CST Fri Jan 19 2018

SHEBOYGAN WI TO PENTWATER MI SOUTH...

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

.REST OF TONIGHT...Southwest gales to 35 kt diminishing to 30 kt.
Waves 8 to 11 ft occasionally to 14 ft subsiding to 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 2 to
4 ft.
.SATURDAY NIGHT...Southwest winds 10 to 20 kt becoming south
10 to 15 kt. Waves 1 to 3 ft subsiding to 1 to 2 ft.
.SUNDAY...Southeast winds 10 to 15 kt. Chance of drizzle. Waves
1 to 2 ft.
.SUNDAY NIGHT...Southeast winds 10 to 20 kt increasing to 15 to
25 kt. Chance of rain in the evening...then rain overnight. Waves
1 to 3 ft building to 3 to 5 ft.
.MONDAY...Southeast winds to 30 kt becoming south. Rain in the
morning...then rain likely in the afternoon. Waves 4 to 6 ft
occasionally to 8 ft.
.MONDAY NIGHT...South winds to 30 kt becoming west. Rain and snow
likely. Waves 4 to 6 ft occasionally to 8 ft.
.TUESDAY...Northwest gales to 35 kt. Chance of snow and rain.
Waves 6 to 9 ft occasionally to 12 ft building to 7 to 10 ft
occasionally to 13 ft.
.WEDNESDAY...Northwest winds 10 to 20 kt. Waves 3 to 5 ft.

$$

LMZ761-201045-
MAFOR 2004/
MICHIGAN NORTH...Gale Warning in effect...11550 11640 11620 12610
12510 11410. Waves 8 to 11 ft occasionally to 14 ft subsiding to
5 to 8 ft occasionally to 10 ft overnight. Waves 4 to 6 ft
occasionally to 8 ft subsiding to 2 to 4 ft Saturday. Waves 1 to
3 ft Saturday evening.

MICHIGAN SOUTH...Gale Warning in effect...12550 11540 11530 13520
11510. Waves 8 to 11 ft occasionally to 14 ft subsiding to 6 to 9
ft occasionally to 12 ft overnight. Waves 4 to 7 ft occasionally
to 9 ft subsiding to 2 to 4 ft Saturday. Waves 2 to 4 ft Saturday
evening.

$$

Lenning

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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