Great Lakes Forecast
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FZUS63 KMQT 061443
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
943 AM EST Wed Dec 6 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 pressure of 28.7 inches over northern Ontario
will weaken to 29.1 inches as it moves to northern Quebec
Wednesday evening. A ridge of 30.0 inches will build over the far
western Great Lakes Thursday. Early Friday, a weak low of 29.7
inches will pass over Lake Superior and stall near Lake Huron
after which a high pressure ridge of 30.1 inches will build into
the Upper Mississippi River Valley Saturday night into Sunday.
Several weak low pressure systems will then pass over Lake
Superior through much of next week.

LSZ162-062245-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
943 AM EST Wed Dec 6 2017 /843 AM CST Wed Dec 6 2017/

...GALE WARNING IN EFFECT UNTIL 6 PM EST /5 PM CST/ THIS
EVENING...

.REST OF TODAY...Northwest gales to 35 knots. Freezing spray.
Scattered snow showers. Waves 5 to 9 feet occasionally to 11 feet.
.TONIGHT...Northwest winds 20 to 30 knots with a few gale force
gusts to 35 knots early. Freezing spray. Scattered snow showers.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Northwest winds 15 to 25 knots backing west. A slight
chance of snow showers in the afternoon. Waves subsiding to 2 to
4 feet, then building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots veering northwest
after midnight. A chance of snow showers. Waves subsiding to 1 to
3 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. A chance of snow showers. Waves 1 to
3 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots veering north
after midnight. A chance of snow showers. Waves building to 2 to
4 feet.
.SATURDAY...North winds 10 to 20 knots backing west. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.SUNDAY...West winds 15 to 25 knots veering northwest. A chance
of snow showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 1 to 3 feet.

$$

LSZ263-062245-
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-
943 AM EST Wed Dec 6 2017

...GALE WARNING IN EFFECT UNTIL 6 PM EST THIS EVENING...

.REST OF TODAY...Northwest gales to 35 knots. Freezing spray.
Snow showers. Waves 8 to 11 feet occasionally to 14 feet
subsiding to 6 to 9 feet occasionally to 11 feet.
.TONIGHT...North winds 20 to 30 knots with a few gale force gusts
to 35 knots becoming northwest late. Freezing spray. Scattered
snow showers. Waves building to 7 to 10 feet occasionally to 13
feet, then subsiding to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...Northwest winds 15 to 25 knots backing west. A chance
of snow showers. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots becoming northwest
10 to 20 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.
.FRIDAY...Northwest winds 10 to 20 knots. Snow showers likely.
Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of snow showers. Waves building
to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 10 to 20 knots backing west. A chance of
snow showers. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.SUNDAY...West winds 15 to 25 knots veering northwest. A chance
of snow showers. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 2 to 4 feet.

$$

LSZ264-062245-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
943 AM EST Wed Dec 6 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...Northwest gales to 40 knots. Freezing spray.
Numerous snow showers. Waves 10 to 14 feet occasionally to 18 feet
subsiding to 8 to 11 feet occasionally to 14 feet.
.TONIGHT...North gales to 40 knots becoming northwest gales to
35 knots late. Freezing spray. Scattered snow showers. Waves
building to 9 to 12 feet occasionally to 15 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet.
.THURSDAY...Northwest winds 15 to 25 knots becoming west by mid
afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Northwest winds 10 to 20 knots. A chance of snow
showers. Freezing spray in the afternoon. Waves subsiding to 2 to
4 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Freezing spray. 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. A chance of snow showers. Waves subsiding to 1 to
3 feet.
.SUNDAY...West winds 15 to 25 knots veering northwest. 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.

$$

LSZ265-062245-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
943 AM EST Wed Dec 6 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...West gales to 45 knots becoming northwest gales
to 40 knots. Numerous snow showers. Waves 7 to 10 feet
occasionally to 13 feet.
.TONIGHT...Northwest gales to 40 knots. Numerous snow showers.
Freezing spray after midnight. Waves building to 9 to 12 feet
occasionally to 15 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet.
.THURSDAY...Northwest winds 20 to 30 knots backing west by mid
afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...West winds 20 to 30 knots veering northwest
after midnight. Snow showers likely. Waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet.
.FRIDAY...Northwest winds 15 to 25 knots. Snow showers likely.
Waves 2 to 4 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots. Freezing spray. Snow
showers likely. Waves building to 3 to 5 feet occasionally to
7 feet.
.SATURDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots. 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.
.SUNDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots. A chance of snow showers, then snow showers likely.
Waves building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ266-062245-
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-
943 AM EST Wed Dec 6 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...West gales to 45 knots becoming northwest gales
to 40 knots. Snow showers. Waves 11 to 15 feet occasionally to
19 feet subsiding to 10 to 14 feet occasionally to 18 feet.
.TONIGHT...Northwest gales to 45 knots becoming north gales to
40 knots by midnight, then backing northwest late. Numerous snow
showers. Freezing spray after midnight. Waves 10 to 14 feet
occasionally to 18 feet.
.THURSDAY...Northwest winds 20 to 30 knots backing west by mid
afternoon. Freezing spray in the morning. A chance of snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 20 to 30 knots veering northwest
after midnight. Snow showers likely. Waves building to 4 to
8 feet occasionally to 10 feet.
.FRIDAY...Northwest winds 15 to 25 knots. Snow showers likely.
Freezing spray in the afternoon. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots increasing to 20 to
30 knots after midnight. Freezing spray. Snow showers likely.
Waves 3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots. Freezing spray. A chance of snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots. A chance of snow showers, then snow showers likely.
Waves building to 4 to 8 feet occasionally to 10 feet.

$$

LSZ267-062245-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
943 AM EST Wed Dec 6 2017

...GALE WARNING IN EFFECT THROUGH LATE TONIGHT...

.REST OF TODAY...West gales to 45 knots becoming northwest gales
to 40 knots by mid afternoon. Snow showers. Waves 12 to 17 feet
occasionally to 21 feet subsiding to 10 to 14 feet occasionally
to 18 feet.
.TONIGHT...Northwest gales to 40 knots becoming north gales to
35 knots by midnight, then diminishing to 20 to 30 knots late.
Numerous snow showers. Waves subsiding to 7 to 10 feet
occasionally to 13 feet.
.THURSDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots by late morning, then increasing to 20 to 30 knots by
mid afternoon. A chance of snow showers. Waves subsiding to 3 to
6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 20 to 30 knots. Snow showers likely.
Waves building to 4 to 8 feet occasionally to 10 feet.
.FRIDAY...Northwest winds 15 to 25 knots. Snow showers. Waves
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots. Snow showers likely.
Waves 2 to 4 feet.
.SATURDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of snow showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.SUNDAY...West winds 15 to 25 knots increasing to 20 to 30 knots.
Snow showers likely. Waves building to 4 to 8 feet occasionally
to 10 feet.

$$
LSZ261-062245-
MAFOR 0616/
Superior West...Gale Warning in effect...14750 11750 12740 11730.
Scattered snow showers and freezing spray. Waves 5 to 9 feet this
afternoon subsiding to 2 to 4 feet Thursday morning.

Superior North Central...Gale Warning in effect...12757 12750
11850 11750 11740 11730. Scattered snow showers and freezing
spray. Waves 8 to 12 feet this afternoon subsiding to 5 to 8 feet
Thursday morning.

Superior South Central...Gale Warning in effect...15757 12740.
Scattered snow showers and freezing spray. Waves 9 to 13 feet
this afternoon subsiding to 5 to 8 feet Thursday morning.

Superior East...Gale Warning in effect...14757 12857 11840 11830.
Scattered snow showers and freezing spray. Waves 11 to 15 feet
this afternoon subsiding to 5 to 8 feet Thursday morning.

$$

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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