Great Lakes Forecast
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FZUS63 KMQT 120855
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
355 AM EST Fri Jan 12 2018

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 trough of 29.6 inches extending from Quebec through
the lower Great Lakes will reach the east coast this evening.
High pressure of 30.8 inches over Saskatchewan this morning will
reach the Ohio Valley Sunday, with a 30.6 inch ridge extending
from east Texas all the way into northern Quebec by Sunday night.
A 30.1 inch trough will move over the western Great Lakes Monday
as a 31.0 inch high begins to move into the northern Plains. The
trough will move over the eastern Great Lakes Tuesday as the high
slowly slides to the east.

LSZ162-121700-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
355 AM EST Fri Jan 12 2018 /255 AM CST Fri Jan 12 2018/

.EARLY THIS MORNING...North winds 15 to 25 knots. A few gale force
gusts to 35 knots near the north shore. Isolated snow showers.
Waves 3 to 5 feet occasionally to 7 feet.
.TODAY...North winds 10 to 20 knots backing northwest by late
morning, then increasing to 15 to 25 knots by mid afternoon. A
few gale force gusts to 35 knots near the north shore in the
morning. Isolated snow showers. Waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots late. Isolated snow showers after midnight. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
1 to 3 feet.
.SATURDAY...Northwest winds 5 to 15 knots becoming west 10 to
20 knots by mid afternoon. A slight chance of snow showers. Waves
subsiding to calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots backing southwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Southwest winds 15 to 25 knots. Snow showers likely in
the afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...West winds 15 to 25 knots becoming north 10 to
20 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...North winds 20 to 30 knots. 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.
.TUESDAY...North winds 10 to 20 knots backing west. A chance of
snow showers. Waves subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-121700-
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-
355 AM EST Fri Jan 12 2018

...HEAVY FREEZING SPRAY WARNING IN EFFECT UNTIL 10 AM EST THIS
MORNING...

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

Note, wave height forecasts are for ice free areas.

$$

LSZ264-121700-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
355 AM EST Fri Jan 12 2018

...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...North winds 20 to 30 knots. Heavy freezing
spray. Scattered snow showers. Waves 6 to 9 feet occasionally to
11 feet.
.TODAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots. Heavy freezing spray. Scattered snow showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. Heavy freezing spray in the evening. Scattered
snow showers. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.SATURDAY...Northwest winds 10 to 20 knots. A chance of snow
showers. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. A chance of snow showers. Waves
building to 2 to 4 feet.
.SUNDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
5 to 15 knots after midnight. Snow showers. Waves subsiding to
1 to 3 feet.
.MONDAY...North winds 20 to 30 knots. Heavy freezing spray. Snow
showers. Waves subsiding to calm to 2 feet, then building to 6 to
9 feet occasionally to 11 feet.
.TUESDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots. Heavy freezing spray. Snow showers, then a chance of
snow showers. Waves subsiding to 1 to 3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-121700-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
355 AM EST Fri Jan 12 2018

...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...North gales to 35 knots. Heavy freezing
spray. Scattered snow showers. Waves 8 to 11 feet occasionally to
14 feet.
.TODAY...North winds 20 to 30 knots backing northwest. Heavy
freezing spray. Scattered snow showers. Waves subsiding to 4 to
7 feet occasionally to 9 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. Heavy freezing spray. Scattered snow showers.
Waves subsiding to 3 to 6 feet occasionally to 8 feet, then
building to 4 to 7 feet occasionally to 9 feet.
.SATURDAY...Northwest winds 15 to 25 knots. Snow showers likely.
Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming south 15 to
25 knots in the afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...Southwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Snow showers. Waves subsiding to
calm to 2 feet.
.MONDAY...Northeast winds 5 to 15 knots increasing to 15 to
25 knots. Snow showers. Freezing spray. Waves building to 5 to
8 feet occasionally to 10 feet.
.TUESDAY...North winds 15 to 25 knots backing northwest. Heavy
freezing spray. Snow showers. Waves subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-121700-
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-
355 AM EST Fri Jan 12 2018

...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...North gales to 40 knots. Heavy freezing
spray. Numerous snow showers. Waves 9 to 12 feet occasionally to
15 feet.
.TODAY...North gales to 35 knots backing northwest. Heavy
freezing spray. Scattered snow showers. Waves subsiding to 5 to
8 feet occasionally to 10 feet.
.TONIGHT...Northwest gales to 35 knots becoming north 20 to
30 knots late. Heavy freezing spray. Scattered snow showers in
the evening. Numerous snow showers after midnight. Waves 5 to
8 feet occasionally to 10 feet.
.SATURDAY...Northwest winds 15 to 25 knots. Heavy freezing spray
in the morning. Snow showers likely. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots becoming west
10 to 20 knots after midnight. Snow showers likely. Waves
subsiding to 1 to 3 feet.
.SUNDAY...Southwest winds 10 to 20 knots becoming south 15 to
25 knots in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...South winds 20 to 30 knots becoming southwest
10 to 20 knots after midnight. Freezing spray in the evening.
Snow showers. Waves subsiding to 1 to 3 feet.
.MONDAY...East winds 15 to 25 knots becoming northeast 20 to
30 knots. Snow showers. Freezing spray. Waves building to 5 to
8 feet occasionally to 10 feet.
.TUESDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots. Freezing spray. Snow showers. Waves subsiding to 2 to
4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-121700-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
355 AM EST Fri Jan 12 2018

...GALE WARNING IN EFFECT UNTIL 7 AM EST THIS MORNING...
...HEAVY FREEZING SPRAY WARNING IN EFFECT THROUGH LATE TONIGHT...

.EARLY THIS MORNING...North gales to 35 knots. Heavy freezing
spray. Numerous snow showers. Waves 6 to 9 feet occasionally to
11 feet.
.TODAY...North winds 20 to 30 knots backing northwest by mid
afternoon. Heavy freezing spray. Scattered snow showers. Waves
subsiding to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northwest gales to 35 knots becoming north 20 to
30 knots by midnight, then diminishing to 15 to 25 knots late.
Heavy freezing spray. Snow showers. Waves subsiding to 4 to
7 feet occasionally to 9 feet.
.SATURDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. A chance of snow showers in the morning, then snow
showers likely in the afternoon. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight. Snow showers likely. Waves subsiding to 1 to
3 feet.
.SUNDAY...Southwest winds 15 to 25 knots backing south in the
afternoon. A chance of snow showers in the morning. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. Snow showers. Waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet.
.MONDAY...Southeast winds 15 to 25 knots backing east. Snow
showers likely. Waves building to 3 to 6 feet occasionally to
8 feet.
.TUESDAY...Northeast winds 15 to 25 knots becoming north 10 to
20 knots. Freezing spray. Snow showers. Waves subsiding to 1 to
3 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-121700-
MAFOR 1210/
Superior West...Heavy Freezing Spray Warning in effect...11830
11820 11720 12730 11740 12730. Waves 3 to 5 feet subsiding to 2
to 4 feet.

Superior North Central...Heavy Freezing Spray Warning in effect...
12842 11742 11732 13742 11730. Heavy freezing spray this morning.
Scattered snow showers this morning. Heavy freezing spray after
midnight. Scattered snow showers overnight. Waves 5 to 9 feet
subsiding to 3 to 6 feet today. Waves 3 to 6 feet tonight.

Superior South Central...Gale Warning in effect...11857 11842
15742. Heavy freezing spray. Scattered snow showers from late
morning on today. Heavy freezing spray overnight. Scattered snow
showers overnight. Waves 7 to 11 feet subsiding to 5 to 9 feet
today. Waves 4 to 7 feet tonight.

Superior East...Gale Warning in effect...11857 12842 11742 13747
11837. Heavy freezing spray. Scattered snow showers today. Heavy
freezing spray tonight. Waves 6 to 9 feet.

$$

Titus

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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