Great Lakes Forecast
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FZUS63 KLOT 131950
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
250 PM CDT Fri Apr 13 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 nearly stationary front will remain just south of
southern Lake Michigan through Saturday as low pressure of 29.1
inches over the Central Plains slowly tracks to the middle
Mississippi River Valley by Saturday morning and weakens slightly
to 29.5 inches. Meanwhile, high pressure of 30.8 inches centered
over northern Ontario will gradually slide east to northern Quebec
by Sunday. The low will lift across the eastern Great Lakes on
Monday reach southern Quebec by Tuesday morning. A ridge of high
pressure of 30.5 inches will build into the Northern and Central
Plains Saturday night and Sunday and then spread to the Middle and
Upper Mississippi Valley on Monday.

LMZ261-362-364-366-563-565-567-669-868-870-140330-
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 Sheboygan to Port Washington WI 5 NM offshore
to Mid Lake-
Lake Michigan from Pentwater to Manistee MI 5 NM offshore to Mid
Lake-
Lake Michigan from Whitehall to Pentwater MI 5 NM offshore to Mid
Lake-
250 PM CDT Fri Apr 13 2018

PORT WASHINGTON WI TO WHITEHALL MI NORTH...

...GALE WARNING IN EFFECT THROUGH SUNDAY EVENING...

.TONIGHT...Northeast gales to 35 kt increasing to 45 kt. Periods
of rain showers with possible snow showers and freezing rain
likely this evening, then snow showers with possible rain showers,
sleet and freezing rain overnight. Waves 10 to 14 ft occasionally
to 18 ft.
.SATURDAY...Northeast gales to 45 kt. Chance of snow and rain
showers in the morning, then light sleet likely with possible
snow showers, rain showers and freezing rain in the afternoon.
Waves 12 to 16 ft occasionally to 21 ft.
.SATURDAY NIGHT...East gales to 45 kt becoming northeast. Sleet
likely with a chance of snow showers in the evening, then sleet
with snow likely overnight. Waves 12 to 16 ft occasionally to
21 ft.
.SUNDAY...Northeast gales to 45 kt diminishing to gales to 40 kt.
Sleet and snow in the morning, then light sleet with snow likely
in the afternoon. Waves 10 to 14 ft occasionally to 18 ft.
.SUNDAY NIGHT...Northeast gales to 35 kt becoming north to 30 kt.
Snow, rain, light freezing rain and light sleet likely in the
evening, then chance of snow, light freezing rain and light sleet
overnight. Waves 7 to 10 ft occasionally to 13 ft.
.MONDAY...North winds to 30 kt becoming northwest. Chance of
snow. Waves 5 to 8 ft occasionally to 10 ft.
.MONDAY NIGHT...Northwest winds to 30 kt. Chance of snow. Waves
5 to 8 ft occasionally to 10 ft.
.TUESDAY...Northwest winds to 30 kt becoming north 15 to 25 kt.
Chance of rain and snow. Waves 4 to 6 ft occasionally to 8 ft
subsiding to 3 to 5 ft.
.WEDNESDAY...Northeast winds 15 to 25 kt becoming north to 30 kt.
Chance of rain and snow. Waves 4 to 6 ft occasionally to 8 ft.

$$

LMZ080-671-673-675-777-779-872-874-876-878-140330-
Lake Michigan from Michigan City IN to St. Joseph MI 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 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-
250 PM CDT Fri Apr 13 2018

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

...GALE WARNING IN EFFECT FROM 1 AM CDT SATURDAY THROUGH SUNDAY
MORNING...

.TONIGHT...Northeast winds to 30 kt increasing to gales to 45 kt.
Periods of rain showers and slight chance of thunderstorms this
evening, then periods of rain showers with a chance of
thunderstorms overnight. Waves 8 to 11 ft occasionally to 14 ft
building to 12 to 16 ft occasionally to 21 ft.
.SATURDAY...Northeast gales to 45 kt becoming east. Rain showers
in the morning, then rain showers likely in the afternoon. Waves
12 to 16 ft occasionally to 21 ft.
.SATURDAY NIGHT...East gales to 45 kt. Rain showers and sleet in
the evening, then rain and sleet overnight. Waves 10 to 14 ft
occasionally to 18 ft.
.SUNDAY...Northeast gales to 40 kt diminishing to 30 kt. Waves 8
to 12 ft occasionally to 16 ft subsiding to 7 to 10 ft
occasionally to 13 ft.
.SUNDAY NIGHT...North winds to 30 kt becoming northwest 15 to
25 kt. Chance of rain and snow in the evening, then chance of
snow and light freezing rain overnight. Waves 6 to 9 ft
occasionally to 12 ft.
.MONDAY...Northwest winds to 30 kt. Chance of snow in the
morning, then chance of rain and snow in the afternoon. Waves
6 to 9 ft occasionally to 12 ft.
.MONDAY NIGHT...Northwest winds to 30 kt. Chance of rain and
snow. Waves 5 to 8 ft occasionally to 10 ft.
.TUESDAY...Northwest winds to 30 kt becoming north 10 to 20 kt in
the afternoon. Waves 4 to 7 ft occasionally to 9 ft subsiding to
3 to 5 ft.
.WEDNESDAY...South winds to 30 kt veering to west. Chance of
rain. Waves 3 to 5 ft building to 4 to 7 ft occasionally to 9 ft.


$$

LMZ761-140330-
MAFOR 1321/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11146 12157 13167
12160. Chance of snow showers early this evening. Chance of
freezing rain late this evening. Chance of freezing rain late,
then chance of snow showers Saturday. Waves 6 to 9 ft
occasionally to 12 ft building to 10 to 14 ft occasionally to 18
ft tonight. Waves 12 to 16 ft occasionally to 21 ft Saturday.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...12140 12156 14166.
Scattered rain showers early this evening. Chance of thunderstorms
late this evening. Waves 5 to 8 ft occasionally to 10 ft building
to 12 to 16 ft occasionally to 21 ft tonight. Waves 12 to 16 ft
occasionally to 21 ft Saturday.

$$

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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