Great Lakes Forecast
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FZUS63 KMQT 070902
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
402 AM EST Thu Dec 7 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 high of 30.7 inches over the central Plains will
remain nearly stationary through tonight while a weak low of 29.7
inches slowly slides across Upper Great Lakes through tonight. A
separate low of 29.7 inches will swing southeast through western
Lake Superior toward southern Lake Michigan Friday night and into
Saturday. Brief ridging of 30.1 inches on Saturday night will give
way to yet another low of 29.6 inches expected to push through
the Great Lakes on Sunday night into Monday morning. Such a
pattern will prevail through next week.

LSZ162-071715-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
402 AM EST Thu Dec 7 2017 /302 AM CST Thu Dec 7 2017/

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TODAY...Northwest winds 20 to 30 knots backing west by late
morning with a few gale force gusts to 35 knots in the afternoon.
Scattered snow showers. Waves subsiding to 3 to 5 feet occasionally
to 7 feet, then building to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...West winds 20 to 30 knots veering northwest late.
Scattered snow showers. Waves subsiding to 2 to 4 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Scattered snow showers in the morning, then numerous
snow showers in the afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots increasing to 20 to
30 knots after midnight. A chance of snow showers. Waves building
to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots becoming northeast 10 to
20 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.MONDAY...North winds 15 to 25 knots increasing to 20 to
30 knots. A chance of snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.

$$

LSZ263-071715-
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-
402 AM EST Thu Dec 7 2017

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. Freezing
spray. Isolated snow showers. Waves 4 to 7 feet occasionally to
9 feet.
.TODAY...Northwest winds 20 to 30 knots backing west by late
morning. A few gale force gusts to 35 knots in the afternoon.
Freezing spray. Scattered snow showers in the morning. Numerous
snow showers in the afternoon. Waves subsiding to 3 to 6 feet
occasionally to 8 feet, then building to 6 to 9 feet occasionally
to 11 feet.
.TONIGHT...West winds 20 to 30 knots veering northwest by
midnight. Scattered snow showers. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Scattered snow showers. Waves
subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Snow showers likely in the evening, then
a chance of snow showers after midnight. Waves building to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. A chance of snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY...West winds 15 to 25 knots becoming north 10 to
20 knots. A chance of snow showers. Waves subsiding to 1 to
3 feet.
.MONDAY...North winds 15 to 25 knots increasing to 20 to
30 knots. Snow showers likely. A chance of snow showers. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
1 to 3 feet.

$$

LSZ264-071715-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
402 AM EST Thu Dec 7 2017

...GALE WARNING IN EFFECT UNTIL 5 AM EST EARLY THIS MORNING...

.EARLY THIS MORNING...Northwest winds 20 to 30 knots with gale
force gusts to 35 knots. Freezing spray. Isolated snow showers.
Waves 6 to 9 feet occasionally to 11 feet.
.TODAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots by late morning, then increasing to 20 to 30 knots by
mid afternoon. Freezing spray in the morning. Scattered snow
showers in the morning, then numerous snow showers in the
afternoon. Waves subsiding to 3 to 5 feet occasionally to 7 feet,
then building to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northwest winds 20 to 30 knots. Scattered snow
showers. Freezing spray after midnight. Waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. Freezing spray in the morning. Scattered snow showers.
Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Snow showers likely in the evening, then
a chance of snow showers after midnight. Waves building to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. Freezing spray in the morning. A
chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.
.SUNDAY...Northwest winds 15 to 25 knots veering north. Snow
showers likely, then a chance of snow showers. Waves building to
3 to 6 feet occasionally to 8 feet, then subsiding to 1 to
3 feet.
.MONDAY...North winds 20 to 30 knots. A chance of snow showers.
Freezing spray. Waves building to 3 to 6 feet occasionally to
8 feet.

$$

LSZ265-071715-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
402 AM EST Thu Dec 7 2017

...GALE WARNING IN EFFECT UNTIL 5 AM EST EARLY THIS MORNING...

.EARLY THIS MORNING...Northwest gales to 35 knots. Freezing
spray. Scattered snow showers. Waves 6 to 10 feet occasionally to
13 feet.
.TODAY...Northwest winds 20 to 30 knots backing west. Freezing
spray in the morning. Scattered snow showers in the morning, then
numerous snow showers in the afternoon. Waves subsiding to 3 to 6
feet occasionally to 8 feet.
.TONIGHT...West winds 20 to 30 knots with a few gale force gusts
to 35 knots, becoming northwest by midnight. Numerous snow
showers. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Numerous snow showers. Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Snow showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...North winds 20 to 30 knots backing northwest in the
afternoon. Freezing spray. Snow showers likely in the morning. A
chance of snow showers in the afternoon. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots backing west
after midnight. A chance of snow showers. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.SUNDAY...West winds 20 to 30 knots veering north. Snow showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 1 to 3 feet.
.MONDAY...North winds 20 to 30 knots. Snow showers. Freezing
spray. Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ266-071715-
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-
402 AM EST Thu Dec 7 2017

...GALE WARNING IN EFFECT UNTIL 5 AM EST EARLY THIS MORNING...

.EARLY THIS MORNING...Northwest gales to 35 knots. Freezing
spray. Numerous snow showers. Waves 9 to 12 feet occasionally to
15 feet.
.TODAY...Northwest winds 20 to 30 knots backing west by mid
afternoon. Freezing spray. Numerous snow showers. Waves subsiding
to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...West winds 20 to 30 knots with a few gale force gusts
to 35 knots veering northwest by midnight. Snow showers. Waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Freezing spray. Numerous snow showers.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Snow showers likely. Waves subsiding to
1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 20 to 30 knots. Freezing spray. A chance
of snow showers. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots backing west
after midnight. Freezing spray in the evening. A chance of snow
showers. Waves subsiding to 2 to 4 feet.
.SUNDAY...West winds 20 to 30 knots veering north. Snow showers.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 2 to 4 feet.
.MONDAY...North winds 20 to 30 knots. Snow showers likely, then a
chance of snow showers. Freezing spray. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ267-071715-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
402 AM EST Thu Dec 7 2017

...GALE WARNING IN EFFECT UNTIL 5 AM EST EARLY THIS MORNING...

.EARLY THIS MORNING...North gales to 35 knots. Freezing spray.
Numerous snow showers. Waves 8 to 11 feet occasionally to 14 feet
subsiding to 7 to 10 feet occasionally to 13 feet.
.TODAY...Northwest winds 20 to 30 knots becoming west by mid
afternoon. Freezing spray in the morning. Snow showers. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...West winds 20 to 30 knots with a few gale force gusts
to 35 knots. Snow showers. Waves building to 8 to 11 feet occasionally
to 14 feet, then subsiding to 5 to 8 feet occasionally to 10
feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Snow showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots. Snow showers likely.
Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.SATURDAY...North winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots becoming west 10 to
20 knots after midnight. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots becoming north 20 to
30 knots. Snow showers likely. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.
.MONDAY...North winds 20 to 30 knots. A chance of snow showers.
Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ261-071715-
MAFOR 0710/
Superior West 11740 11730 12640 12640 19650 12740. Freezing spray
early this morning and again late tonight. Scattered snow showers
from late morning through tonight. Waves 3 to 6 feet building to
4 to 7 feet today. Waves 5 to 8 feet subsiding to 3 to 6 feet
tonight.

Superior North Central 12740 19750 11730 11647 11747 13740.
Freezing spray this morning and late tonight. Scattered snow
showers late this morning through tonight. Waves 5 to 9 feet
subsiding to 3 to 6 feet today. Waves 4 to 7 feet tonight.

Superior South Central 11740 19750 11740 11747 11647 12647 19657
11647 11747. Freezing spray this morning. Scattered snow showers
this morning. Waves 7 to 11 feet subsiding to 4 to 7 feet today.
Waves 4 to 7 feet tonight.

Superior East 11847 19857 13747 13647 11747. Freezing spray this
morning. Waves 6 to 10 feet subsiding to 5 to 7 feet today. Waves
5 to 7 feet building to 6 to 10 feet tonight.

$$

JLA

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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