Great Lakes Forecast
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000
FZUS63 KLOT 150152
GLFLM

OPEN LAKE FORECAST for Lake Michigan
National Weather Service Chicago/Romeoville IL
852 PM CDT Sat Apr 14 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...Low pressure of 29.6 inches over southern Indiana
will continue moving slowly east on Sunday, before deepening
slightly to 29.5 inches and lifting across the eastern Great
Lakes Sunday night and Monday. The low will continue to lift into
southern Quebec Tuesday morning. Meanwhile, high pressure of 30.8
inches centered over Northern Ontario gradually drifts to northern
Quebec by Sunday evening. A ridge of high pressure averaging 30.4
inches will build into the Northern and Central Plains tonight
and Sunday and then spread to the Middle and Upper Mississippi
Valley Monday night into Tuesday.

LMZ261-362-364-366-563-565-567-669-868-870-150930-
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-
852 PM CDT Sat Apr 14 2018

PORT WASHINGTON WI TO WHITEHALL MI NORTH...

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

.REST OF TONIGHT...East gales to 45 kt becoming northeast. Snow
with possible sleet, freezing rain and rain. Waves 12 to 16 ft
occasionally to 21 ft.
.SUNDAY...Northeast gales to 45 kt. Snow, slight chance of rain
and light freezing rain. Waves 14 to 18 ft occasionally to 23 ft
subsiding to 10 to 14 ft occasionally to 18 ft.
.SUNDAY NIGHT...Northeast gales to 40 kt becoming north to 30 kt.
Snow and rain likely in the evening, then chance of snow
overnight. Waves 10 to 14 ft occasionally to 18 ft subsiding to
6 to 9 ft occasionally to 12 ft.
.MONDAY...North winds to 30 kt becoming northwest. Chance of snow
and rain 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 snow and rain
in the evening, then chance of snow overnight. Waves 5 to 8 ft
occasionally to 10 ft.
.TUESDAY...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Chance of snow and rain in the morning. Waves 4 to 7 ft
occasionally to 9 ft subsiding to 3 to 5 ft.
.TUESDAY NIGHT...North winds 10 to 20 kt becoming northeast.
Waves 1 to 3 ft.
.WEDNESDAY...East winds 15 to 25 kt becoming northeast to 30 kt.
Chance of rain and snow. Waves 3 to 5 ft building to 4 to 6 ft
occasionally to 8 ft.
.THURSDAY...North winds 15 to 25 kt. Chance of snow. Waves 6 to
9 ft occasionally to 12 ft.

$$

LMZ080-671-673-675-777-779-872-874-876-878-150930-
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-
852 PM CDT Sat Apr 14 2018

PORT WASHINGTON WI TO WHITEHALL MI SOUTH...

...GALE WARNING IN EFFECT THROUGH SUNDAY MORNING...

.REST OF TONIGHT...East gales to 45 kt becoming northeast. Rain,
sleet, snow with a chance of freezing rain. Waves 12 to 16 ft
occasionally to 21 ft subsiding to 8 to 12 ft occasionally to
16 ft.
.SUNDAY...Northeast gales to 35 kt diminishing to 15 to 25 kt.
Rain, snow with a chance of light freezing rain in the morning,
then chance of rain and slight chance of light freezing rain in
the afternoon. Waves 10 to 14 ft occasionally to 18 ft subsiding
to 6 to 9 ft occasionally to 12 ft.
.SUNDAY NIGHT...North winds 10 to 20 kt becoming northwest late
in the evening, then increasing to 15 to 25 kt after midnight
increasing to 30 kt late. Chance of rain and snow likely in the
evening, then chance of snow, rain and light freezing rain
overnight. Waves 6 to 9 ft occasionally to 12 ft.
.MONDAY...Northwest winds to 30 kt. Chance of snow and rain in
the morning, then chance of rain in the afternoon. Waves 6 to
9 ft occasionally to 12 ft.
.MONDAY NIGHT...Northwest winds to 30 kt. Chance of rain and snow
in the evening, then chance of snow and rain overnight. Waves
6 to 9 ft occasionally to 12 ft.
.TUESDAY...Northwest winds 15 to 25 kt diminishing to 10 to
20 kt. Waves 4 to 7 ft occasionally to 9 ft subsiding to 4 to
6 ft occasionally to 8 ft.
.TUESDAY NIGHT...Northeast winds 10 to 20 kt becoming east. Waves
2 to 4 ft.
.WEDNESDAY...Southeast winds to 30 kt veering to west. Chance of
rain. Waves 4 to 7 ft occasionally to 9 ft.
.THURSDAY...Northwest winds to 30 kt diminishing to 15 to 25 kt.
Waves 6 to 9 ft occasionally to 12 ft subsiding to 4 to 7 ft
occasionally to 9 ft.

$$
LMZ761-150930-
MAFOR 1503/
MICHIGAN NORTH...GALE WARNING IN EFFECT...11267 15167 11157.
Chance of freezing rain late this evening. Waves 12 to 16 ft
occasionally to 21 ft overnight. Waves 14 to 18 ft occasionally
to 23 ft subsiding to 12 to 16 ft occasionally to 21 ft Sunday.
Waves 10 to 14 ft occasionally to 18 ft Sunday evening.

MICHIGAN SOUTH...GALE WARNING IN EFFECT...12267 11167 11157 13147
11837. Chance of freezing rain overnight. Chance of rain Sunday
and Sunday evening. Waves 12 to 16 ft occasionally to 21 ft
overnight. Waves 10 to 14 ft occasionally to 18 ft subsiding to 8
to 11 ft occasionally to 14 ft Sunday. Waves 8 to 11 ft
occasionally to 14 ft Sunday 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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