Great Lakes Forecast
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000
FZUS63 KMQT 100307
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1007 PM 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...Low pressure of 26.8 inches over Southern Manitoba
will sweep over Lake Superior early Sunday. A high of 30.1 inches
will then move over the upper Great Lakes late Sunday before a low
of 29.8 inches passes through the Great Lakes on Monday. A high
of 30.2 inches will then build into the region late Tuesday and
into Wednesday.

LSZ162-101115-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1007 PM EST Sat Dec 9 2017 /907 PM CST Sat Dec 9 2017/

.REST OF TONIGHT...West winds 10 to 20 knots veering northwest
late. Scattered snow showers. Waves 1 to 3 feet 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...Northwest winds 5 to 15 knots backing southwest
by midnight, then increasing to 10 to 20 knots late. Snow showers
after midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. A slight chance of freezing rain in
the morning. A chance of snow showers. Waves building to 4 to
7 feet occasionally to 9 feet.
.MONDAY NIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Freezing spray in the evening. A chance
of snow showers. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west. A
chance of snow showers. Waves building to 1 to 3 feet.
.THURSDAY...Northwest winds 15 to 25 knots. A chance of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet.

$$

LSZ263-101115-
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-
1007 PM EST Sat Dec 9 2017

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

$$

LSZ264-101115-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1007 PM EST Sat Dec 9 2017

.REST OF TONIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 knots by midnight, then becoming north 15 to 25 knots
late. Scattered snow showers. Waves 2 to 4 feet 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 2 to 4 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots backing southwest
late. A chance of snow showers after midnight. Waves subsiding to
calm to 2 feet.
.MONDAY...South winds 5 to 15 knots becoming north gales to
35 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 40 knots diminishing to 20 to
30 knots after midnight. Heavy freezing spray. A chance of snow
showers. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 5 to 8 feet occasionally to 10 feet.
.TUESDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots in the afternoon. Freezing spray in the morning. A
chance of snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots becoming west 10 to
20 knots. Snow showers likely. Waves building to 2 to 4 feet.
.THURSDAY...North winds 20 to 30 knots backing northwest. Snow
showers likely, then a chance of snow showers. Waves building to
4 to 7 feet occasionally to 9 feet, then subsiding to 2 to
4 feet.

$$

LSZ265-101115-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1007 PM EST Sat Dec 9 2017

.REST OF TONIGHT...West winds 20 to 30 knots diminishing to 15 to
25 knots by midnight, then veering northwest late. Scattered snow
showers late in the evening, then snow showers after midnight.
Waves 3 to 6 feet occasionally to 8 feet.
.SUNDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then backing northwest by mid
afternoon. Scattered snow showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots backing southwest
late. A chance of snow showers. Waves subsiding to calm to
2 feet.
.MONDAY...South winds 10 to 20 knots becoming northwest 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. Waves building to 9 to 12 feet occasionally to 15 feet,
then subsiding to 7 to 10 feet occasionally to 13 feet.
.TUESDAY...North winds 20 to 30 knots. Freezing spray. Snow
showers likely in the morning. A chance of snow showers in the
afternoon. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 10 to 20 knots increasing to 15 to
25 knots. A chance of snow showers, then snow showers likely.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.THURSDAY...Northwest winds 20 to 30 knots. Snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
2 to 4 feet.

$$

LSZ266-101115-
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-
1007 PM EST Sat Dec 9 2017

.REST OF TONIGHT...West winds 20 to 30 knots veering northwest by
midnight. Freezing spray. Snow showers. Waves 3 to 5 feet
occasionally to 7 feet building to 5 to 8 feet occasionally to
10 feet.
.SUNDAY...North winds 20 to 30 knots. Freezing spray in the
morning. Scattered snow showers. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots by midnight, then backing southwest late. 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 northwest 20 to
30 knots in the afternoon. Snow showers likely. Waves building to
3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...North gales to 40 knots. Freezing spray. Snow
showers. Waves building to 10 to 14 feet occasionally to 18 feet,
then subsiding to 9 to 12 feet occasionally to 15 feet.
.TUESDAY...North gales to 35 knots diminishing to 20 to 30 knots
in the afternoon. Freezing spray. Snow showers likely. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.TUESDAY NIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Freezing spray in the evening. Snow
showers likely. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots backing west. A
chance of snow showers, then snow showers likely. Waves subsiding
to calm to 2 feet, then building to 2 to 4 feet.
.THURSDAY...Northwest winds 20 to 30 knots veering north. Snow
showers likely. Waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.

$$

LSZ267-101115-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1007 PM EST Sat Dec 9 2017

.REST OF TONIGHT...Northwest winds 15 to 25 knots increasing to
20 to 30 knots by midnight. Snow showers. Waves 2 to 4 feet
building to 5 to 8 feet occasionally to 10 feet.
.SUNDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Freezing spray in the morning.
Scattered snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots becoming northwest
5 to 15 knots by midnight, then backing southwest late. 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. Snow showers likely. Waves
building to 1 to 3 feet.
.MONDAY NIGHT...North gales to 40 knots. Freezing spray. Snow
showers likely. Waves building to 7 to 11 feet occasionally to
14 feet.
.TUESDAY...North gales to 35 knots diminishing to 20 to 30 knots
in the afternoon. Freezing spray. A chance of snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 10 to 20 knots becoming southwest 15 to
25 knots. A chance of snow showers, then snow showers likely.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.THURSDAY...West winds 15 to 25 knots veering north. Snow showers
likely. Waves building to 3 to 6 feet occasionally to 8 feet.

$$
LSZ261-101115-
MAFOR 1004/
Superior West 11620 11720 13820 12710 11700. Scattered snow
showers overnight. Waves 2 to 4 feet overnight subsiding to 1 to
3 feet Sunday. Waves 2 feet or less Sunday evening.

Superior North Central 12737 14830 11720 11710. Freezing spray
late. Scattered snow showers late overnight through early
afternoon Sunday. Waves 3 to 6 feet overnight and Sunday. Waves 2
to 4 feet subsiding to 1 to 3 feet Sunday evening.


Superior South Central 11637 12737 13830 11730 11720. Freezing
spray. Scattered snow showers from late morning on Sunday
through early evening Sunday evening. Waves 3 to 7 feet
overnight through Sunday. Waves 3 to 5 feet subsiding to 2 to 4
feet Sunday evening.

Superior East 12737 11837 13830 12820. Freezing spray Sunday
morning. Scattered snow showers Sunday. Chance of snow showers
Sunday evening. Waves 3 to 5 feet building to 5 to 7 feet
overnight. Waves 4 to 7 feet Sunday subsiding to 2 to 4 feet
Sunday evening.

$$

RJT

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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