Great Lakes Forecast
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FZUS63 KMQT 082053
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
353 PM EST Fri Dec 8 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 western Ontario will deepen
slightly and move across the western Great Lakes late Friday into
Saturday. 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 will swing southwest through
the western Great Lakes late Monday into Tuesday. A high of 30.2
inches will then build into the region on Wednesday.

LSZ162-090500-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
353 PM EST Fri Dec 8 2017 /253 PM CST Fri Dec 8 2017/

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Snow showers.
Waves calm to 2 feet.
.TONIGHT...North winds 10 to 20 knots increasing to 20 to
30 knots. Scattered snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...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 morning. Waves subsiding to 1 to
3 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots. A slight chance of
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 in the
afternoon. A slight chance of snow showers. Waves subsiding to
calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots becoming east 10 to
20 knots after midnight. A chance of snow showers. Waves calm to
2 feet.
.MONDAY...North winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of snow showers. Waves building to
3 to 5 feet occasionally to 7 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 3 to 6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming northwest
15 to 25 knots. A chance of snow showers. Waves building to 1 to
3 feet.

$$

LSZ263-090500-
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-
353 PM EST Fri Dec 8 2017

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

$$

LSZ264-090500-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
353 PM EST Fri Dec 8 2017

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Scattered
snow showers. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.TONIGHT...North winds 5 to 15 knots increasing to 15 to 25 knots
by midnight. Scattered snow showers. Waves building to 3 to 6
feet occasionally to 8 feet.
.SATURDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then backing northwest by mid
afternoon. Freezing spray in the morning. Scattered snow showers.
Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots veering northwest
late. A chance of snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY...North winds 10 to 20 knots. A chance of snow showers.
Waves subsiding to 2 to 4 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots becoming east 5 to
15 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.MONDAY...North winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of snow showers in the morning, then
snow showers likely in the afternoon. Freezing spray in the
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...North winds 20 to 30 knots. Heavy freezing spray.
A chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY...North 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...West winds 5 to 15 knots becoming northwest 10 to
20 knots. A chance of snow showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.

$$

LSZ265-090500-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
353 PM EST Fri Dec 8 2017

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Scattered snow
showers. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.TONIGHT...West winds 5 to 15 knots veering north by midnight,
then increasing to 15 to 25 knots late. Scattered snow showers in
the evening, then numerous snow showers after midnight. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then backing northwest by mid
afternoon. Freezing spray. Numerous snow showers in the morning.
Scattered snow showers in the afternoon. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots by midnight. A chance of snow showers in the evening,
then snow showers after midnight. Waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...Northwest winds 15 to 25 knots veering north in the
afternoon. A chance of snow showers. 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...Southwest winds 10 to 20 knots becoming north 15 to
25 knots in the afternoon. Snow showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.MONDAY NIGHT...North gales to 35 knots. Freezing spray. Snow
showers. Waves building to 6 to 9 feet occasionally to 11 feet.
.TUESDAY...North gales to 35 knots becoming northwest 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 10 to 20 knots. A chance of snow showers,
then snow showers likely. Waves subsiding to calm to 2 feet.

$$

LSZ266-090500-
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-
353 PM EST Fri Dec 8 2017

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Scattered
snow showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 5 to 15 knots becoming northeast 10 to
20 knots by midnight, then increasing to 15 to 25 knots late.
Scattered snow showers. Waves subsiding to 1 to 3 feet, then
building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...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. Scattered 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 becoming west
20 to 30 knots by midnight, then veering northwest late. A chance
of snow showers in the evening, then snow showers after midnight.
Waves subsiding to 3 to 5 feet occasionally to 7 feet, then
building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...North winds 20 to 30 knots. Snow showers. Freezing
spray in the afternoon. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots backing northwest
after midnight. A chance of snow showers. Waves subsiding to calm
to 2 feet.
.MONDAY...Southwest winds 10 to 20 knots becoming north 15 to
25 knots in the afternoon. Snow showers likely. Waves building to
3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...North winds 20 to 30 knots increasing to gales to
40 knots after midnight. Freezing spray. Snow showers in the
evening. A chance of snow showers after midnight. Waves building
to 7 to 10 feet occasionally to 13 feet.
.TUESDAY...North gales to 35 knots diminishing to 20 to 30 knots.
Freezing spray. Snow showers likely. A chance of snow showers.
Waves subsiding to 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots. A chance of snow showers,
then snow showers likely. Waves subsiding to calm to 2 feet.

$$

LSZ267-090500-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
353 PM EST Fri Dec 8 2017

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Scattered
snow showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering east by
midnight, then increasing to 10 to 20 knots late. Numerous snow
showers in the evening, then scattered snow showers after
midnight. Waves subsiding 2 to 4 feet.
.SATURDAY...Northeast winds 15 to 25 knots backing north.
Scattered snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots backing west by
midnight, then increasing to 20 to 30 knots late. A chance of
snow showers in the evening, then snow showers after midnight.
Waves building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...North winds 20 to 30 knots. Snow showers likely in the
morning, then a chance of snow showers in the afternoon. Freezing
spray in the afternoon. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots. A chance of snow
showers. Waves subsiding to calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots backing north in the
afternoon. Snow showers likely. Waves building to 1 to 3 feet.
.MONDAY NIGHT...North winds 20 to 30 knots. Snow showers likely
in the evening, then a chance of snow showers after midnight.
Freezing spray after midnight. Waves building to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...North 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...West winds 10 to 20 knots backing southwest. A
chance of snow showers, then snow showers likely. Waves subsiding
to calm to 2 feet.

$$

LSZ261-090500-
MAFOR 0822/
Superior West 11717 11837 14830 11820 11720. Scattered snow
showers late this evening. Waves 1 to 3 feet building to 3 to 6
feet tonight. Waves 3 to 6 feet subsiding to 1 to 3 feet Saturday.


Superior North Central 11710 11820 11120 14830 11720. Scattered
snow showers tonight. Freezing spray Saturday morning. Scattered
snow showers through early afternoon Saturday. Waves 1 to 5 feet
tonight. Waves 2 to 6 feet.

Superior South Central 11610 11607 11707 14837 11720. Scattered
snow showers this evening. Freezing spray. Scattered snow showers
late Saturday. Waves 1 to 5 feet tonight. Waves 4 to 7 feet
subsiding to 3 to 6 feet Saturday.

Superior East 11710 11800 11117 11227 12130 11830 11820.
Scattered snow showers. Waves 2 to 5 feet.

$$

Petro

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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