Great Lakes Forecast
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FZUS63 KMQT 091446
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
946 AM EST Sat Dec 9 2017

For waters beyond five nautical miles of shore on Lake Superior

Waves are the significant wave height - the average of the
highest 1/3 of the wave spectrum. Occasional wave height is the
average of the highest 1/10 of the wave spectrum.

.SYNOPSIS...A low of 29.7 inches over central Wisconsin will
reach the eastern Great Lakes this evening. A secondary low of
29.8 inches will swing through southern Ontario early Sunday as
brief ridging builds into the area early Monday. Yet another low
of 29.8 inches will swing southeast through the western Great
Lakes late Monday into Tuesday. A high of 30.2 inches will then
build into the region on Wednesday.

LSZ162-092300-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
946 AM EST Sat Dec 9 2017 /846 AM CST Sat Dec 9 2017/

.REST OF TODAY...North winds 15 to 25 knots becoming northwest
10 to 20 knots by late morning, then backing west by mid
afternoon. Isolated snow showers in the afternoon. Waves 3 to
5 feet occasionally to 7 feet subsiding to 1 to 3 feet.
.TONIGHT...West winds 15 to 25 knots becoming northwest 10 to
20 knots late. Isolated snow showers. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Isolated snow showers. Waves subsiding to calm to
2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots backing south after
midnight. A slight chance of snow showers in the evening, then
snow showers likely after midnight. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots increasing to 20 to 30 knots
in the afternoon. A chance of snow showers. Waves building to
3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. A chance of snow showers. Waves building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
5 feet occasionally to 7 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...South winds 10 to 20 knots veering northwest. A
chance of snow showers. Waves building to 2 to 4 feet.

$$

LSZ263-092300-
Lake Superior from Saxon Harbor WI to Upper Entrance to Portage
Canal MI 5NM off shore to the US/Canadian border including Isle
Royale National Park-
946 AM EST Sat Dec 9 2017

.REST OF TODAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then backing northwest by mid
afternoon. Freezing spray ending this afternoon. Isolated snow
showers. Waves 3 to 6 feet occasionally to 8 feet subsiding to 1
to 3 feet.
.TONIGHT...Northwest 10 to 20 knots. Scattered snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.SUNDAY...North winds 10 to 20 knots diminishing to 5 to 15 knots
by mid afternoon. Scattered snow showers. Waves subsiding to calm
to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots backing south after
midnight. A chance of snow showers. Waves calm to 2 feet.
.MONDAY...North winds 5 to 15 knots increasing to 20 to 30 knots
in the afternoon. Snow showers likely in the morning, then a
chance of snow showers in the afternoon. Waves building to 3 to
6 feet occasionally to 8 feet.
.MONDAY NIGHT...North winds 20 to 30 knots. Freezing spray. A
chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of snow showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY...South winds 5 to 15 knots becoming north 10 to
20 knots. A chance of snow showers, then snow showers likely.
Waves building to 2 to 4 feet.

$$

LSZ264-092300-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
946 AM EST Sat Dec 9 2017

.REST OF TODAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then backing northwest by mid
afternoon. Freezing spray ending this afternoon. Scattered snow
showers. Waves 3 to 6 feet occasionally to 8 feet subsiding to 2
to 4 feet.
.TONIGHT...West winds 10 to 20 knots becoming northwest 15 to
25 knots by midnight. Scattered snow showers in the evening, then
numerous snow showers after midnight. Waves building to 3 to
6 feet occasionally to 8 feet.
.SUNDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Scattered snow showers. Waves
subsiding to 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots backing south after
midnight. A chance of snow showers. Waves subsiding to calm to
2 feet.
.MONDAY...North winds 5 to 15 knots increasing to 20 to 30 knots
in the afternoon. Snow showers likely. Freezing spray in the
afternoon. Waves building to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...North gales to 35 knots diminishing to 20 to
30 knots after midnight. Heavy freezing spray. A chance of snow
showers. Waves building to 5 to 9 feet occasionally to 11 feet.
.TUESDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots. Freezing spray. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.WEDNESDAY...South winds 5 to 15 knots becoming southwest 10 to
20 knots. A chance of snow showers, then snow showers likely.
Waves building to 2 to 4 feet.

$$

LSZ265-092300-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
946 AM EST Sat Dec 9 2017

.REST OF TODAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then backing northwest by mid
afternoon. Freezing spray ending this afternoon. Numerous snow
showers late in the morning, then scattered snow showers in the
afternoon. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 20 to 30 knots veering northwest late.
Scattered snow showers. Waves 3 to 6 feet occasionally 8 feet.
.SUNDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then backing northwest by mid
afternoon. Numerous snow showers in the morning, then scattered
snow showers in the afternoon. Waves subsiding to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots backing southwest
after midnight. A chance of snow showers. Waves subsiding to calm
to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming north 20 to
30 knots in the afternoon. Snow showers likely. Waves building to
3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...North gales to 40 knots. Freezing spray. Snow
showers likely. Waves building to 6 to 10 feet occasionally to
13 feet.
.TUESDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. A chance of snow
showers, then snow showers likely. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

$$

LSZ266-092300-
Lake Superior East of a line from Manitou Island to Marquette MI
and West of a line from Grand Marais MI to the US/Canadian Border
Beyond 5NM from shore-
946 AM EST Sat Dec 9 2017

.REST OF TODAY...North winds 15 to 25 knots increasing to 20 to
30 knots by late morning, then becoming northwest 15 to 25 knots
by mid afternoon. Freezing spray ending this afternoon. Scattered
snow showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 20 to 30 knots. Snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Freezing spray in the morning.
Numerous snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. A chance of snow showers in the
evening, then snow showers likely after midnight. Waves subsiding
to calm to 2 feet.
.MONDAY...South winds 10 to 20 knots becoming north 20 to
30 knots in the afternoon. Snow showers likely. Waves building to
3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...North gales to 40 knots. Freezing spray. Snow
showers in the evening. A chance of snow showers after midnight.
Waves building to 7 to 11 feet occasionally to 14 feet.
.TUESDAY...North gales to 35 knots diminishing to 15 to 25 knots.
Freezing spray. Snow showers likely. A chance of snow showers.
Waves subsiding to 2 to 4 feet.
.WEDNESDAY...North winds 10 to 20 knots backing southwest. A
chance of snow showers, then snow showers likely. Waves subsiding
to calm to 2 feet, then building to 2 to 4 feet.

$$

LSZ267-092300-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
946 AM EST Sat Dec 9 2017

.REST OF TODAY...Northeast winds 15 to 25 knots backing north.
Scattered snow showers. Waves 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots increasing to 20 to
30 knots by midnight. Snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.SUNDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Freezing spray in the morning.
Numerous snow showers in the morning, then scattered snow showers
in the afternoon. Waves subsiding to 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. A chance of snow showers in the
evening, then snow showers likely after midnight. Waves subsiding
to calm to 2 feet.
.MONDAY...South winds 10 to 20 knots backing north in the
afternoon. Snow showers likely. Waves building to 1 to 3 feet.
.MONDAY NIGHT...North gales to 35 knots. Snow showers in the
evening, then a chance of snow showers after midnight. Freezing
spray after midnight. Waves building to 6 to 9 feet occasionally
to 11 feet.
.TUESDAY...North gales to 35 knots diminishing to 15 to 25 knots.
Freezing spray. A chance of snow showers. Waves subsiding to 1 to
3 feet.
.WEDNESDAY...North winds 10 to 20 knots backing southwest. A
chance of snow showers, then snow showers likely. Waves subsiding
to calm to 2 feet, then building to 1 to 3 feet.

$$
LSZ261-092300-
MAFOR 0916/
Superior West 11820 11720 11620 12630 12720 11820. Scattered snow
showers. Waves 3 to 5 feet subsiding to 1 to 4 feet Saturday
afternoon.

Superior North Central 11830 11720 11730 13737 12830. Freezing
spray. Scattered snow showers. Waves 3 to 5 feet.

Superior South Central 11837 11720 11730 11630 11637 12737 11837.
Freezing spray through early Saturday afternoon. Scattered snow
showers. Waves 3 to 6 feet.

Superior East 11830 11820 11720 11730 12737 11847 11840.
Scattered snow showers. Freezing spray. Waves 2 to 4 feet this
afternoon building to 5 to 7 feet tonight.

$$

Borchardt

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes



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