Great Lakes Forecast
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FZUS63 KMQT 161459
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
959 AM EST Thu Nov 16 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 29.6 inches will continue to track through
Southern Quebec today while a 30.3 inch ridge crosses the Upper
Great Lakes. This ridge will continue eastward ahead of another
29.6 inch trough that will reach the Upper Great Lakes Friday
night. This trough will move eastward through the weekend and
strengthen to around 29.0 inches across the Eastern Great Lakes
Saturday night, while a 30.2 inch ridge drops southeast across
the Northern and Central Plains. A 29.3 inch trough will move
through Alberta and Saskatchewan towards the Upper Great Lakes
on Monday.

LSZ162-162300-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
959 AM EST Thu Nov 16 2017 /859 AM CST Thu Nov 16 2017/

.REST OF TODAY...Northeast winds 10 to 20 knots veering east.
Waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to
4 feet.
.TONIGHT...Southeast winds 15 to 25 knots becoming south 20 to
30 knots late. A chance of rain and snow. Waves building to 4 to
7 feet occasionally to 9 feet.
.FRIDAY...South winds 20 to 30 knots becoming southwest 15 to
25 knots by late morning, then diminishing to 10 to 20 knots by
mid afternoon. A chance of snow in the morning. Rain likely.
Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots becoming north 10 to
20 knots after midnight. A slight chance of rain. A slight chance
of snow after midnight. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.SATURDAY...North winds 15 to 25 knots backing northwest in the
afternoon. A chance of snow showers in the afternoon. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of snow showers. Waves
3 to 5 feet occasionally to 7 feet.
.SUNDAY...West winds 10 to 20 knots backing southwest. Waves
subsiding to 1 to 3 feet.
.MONDAY...Southwest winds 10 to 20 knots becoming west 20 to
30 knots. Waves subsiding to calm to 2 feet, then building to
4 to 7 feet occasionally to 9 feet.

$$

LSZ263-162300-
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-
959 AM EST Thu Nov 16 2017

.REST OF TODAY...Northeast winds 20 to 30 knots diminishing to
10 to 20 knots by late morning, then veering east by mid
afternoon. Waves 5 to 8 feet occasionally to 10 feet subsiding to
2 to 4 feet.
.TONIGHT...Southeast winds 15 to 25 knots becoming south 20 to
30 knots late. A chance of rain and snow. Waves building to 4 to
7 feet occasionally to 9 feet.
.FRIDAY...South winds 20 to 30 knots becoming southwest 10 to
20 knots by mid afternoon. Snow likely in the morning. Rain.
Waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 2 to 4 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots becoming north 10 to
20 knots after midnight. A chance of rain. A slight chance of
snow after midnight. Waves subsiding to calm to 2 feet, then
building to 1 to 3 feet.
.SATURDAY...North winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots. Snow showers
likely in the evening, then a chance of snow showers after
midnight. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of snow showers. Waves subsiding to 1 to
3 feet.
.MONDAY...South winds 15 to 25 knots becoming west 20 to
30 knots. Waves building to 5 to 8 feet occasionally to 10 feet.

$$

LSZ264-162300-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
959 AM EST Thu Nov 16 2017

...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
AFTERNOON...

.REST OF TODAY...North winds 20 to 30 knots becoming northeast
15 to 25 knots by late morning, then diminishing to 5 to 15 knots
by mid afternoon. Waves 7 to 10 feet occasionally to 13 feet
subsiding to 2 to 4 feet.
.TONIGHT...Southeast winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then becoming south gales to 35 knots late.
A chance of snow, possibly mixed with rain after midnight. Waves
subsiding to 1 to 3 feet, then building to 6 to 9 feet
occasionally to 11 feet.
.FRIDAY...South gales to 35 knots becoming southwest 15 to
25 knots by mid afternoon. Snow in the morning...then rain. Waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight. A chance of rain. A slight chance
of snow after midnight. Waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet.
.SATURDAY...North winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. Waves building to 8 to 11 feet
occasionally to 14 feet.
.SATURDAY NIGHT...North gales to 35 knots backing northwest after
midnight. Snow showers likely. Freezing spray after midnight.
Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...Northwest winds 20 to 30 knots becoming west 10 to
20 knots. Freezing spray. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.MONDAY...South winds 10 to 20 knots becoming west 20 to
30 knots. A chance of rain showers, possibly mixed with snow.
Waves subsiding to calm to 2 feet, then building to 6 to 9 feet
occasionally to 11 feet.

$$

LSZ265-162300-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
959 AM EST Thu Nov 16 2017

...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
AFTERNOON...

.REST OF TODAY...North winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then becoming northeast 10 to 20 knots
by mid afternoon. Isolated snow showers late in the morning.
Waves 10 to 14 feet occasionally to 18 feet subsiding to 3 to
5 feet occasionally to 7 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 15 to
25 knots by midnight, then becoming south gales to 35 knots late.
A chance of snow, possibly mixed with rain after midnight. Waves
subsiding to 1 to 3 feet, then building to 5 to 8 feet
occasionally to 10 feet.
.FRIDAY...South gales to 40 knots diminishing to 20 to 30 knots
by mid afternoon. Snow likely in the morning...then rain. Waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...Southwest winds 10 to 20 knots veering north
after midnight. Rain likely in the evening, then a chance of
rain, possibly mixed with snow after midnight. Waves subsiding to
calm to 2 feet, then building to 1 to 3 feet.
.SATURDAY...North winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. A chance of snow showers, possibly
mixed with rain. Waves building to 9 to 12 feet occasionally to
15 feet.
.SATURDAY NIGHT...Northwest gales to 35 knots. Snow showers
likely. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.SUNDAY...Northwest winds 20 to 30 knots becoming west 15 to
25 knots. Snow showers likely, then a chance of snow showers.
Waves subsiding to calm to 2 feet.
.MONDAY...South winds 15 to 25 knots becoming west 20 to
30 knots. Waves building to 4 to 7 feet occasionally to 9 feet.

$$

LSZ266-162300-
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-
959 AM EST Thu Nov 16 2017

...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
AFTERNOON...

.REST OF TODAY...North gales to 35 knots diminishing to 20 to
30 knots by late morning, then becoming northeast 10 to 20 knots
by mid afternoon. Waves 10 to 14 feet occasionally to 18 feet
subsiding to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...East winds 10 to 20 knots becoming southeast 15 to
25 knots by midnight, then becoming south gales to 35 knots late.
A chance of snow, possibly mixed with rain after midnight. Waves
subsiding to 1 to 3 feet, then building to 6 to 9 feet
occasionally to 11 feet.
.FRIDAY...South gales to 40 knots. A chance of snow in the
morning...then rain. Waves building to 9 to 12 feet occasionally
to 15 feet, then subsiding to 5 to 8 feet occasionally to 10 feet.
.FRIDAY NIGHT...Southwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Rain in the evening, then a chance
of rain after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...North winds 20 to 30 knots increasing to gales to
40 knots in the afternoon. A chance of rain showers, possibly
mixed with snow. Waves building to 10 to 14 feet occasionally to
18 feet.
.SATURDAY NIGHT...North gales to 40 knots becoming northwest
gales to 35 knots after midnight. A chance of rain showers in the
evening. Snow showers likely. Waves subsiding to 10 to 14 feet
occasionally to 18 feet.
.SUNDAY...Northwest 20 to 30 knots with a few gale force
gusts to 35 knots becoming west 15 to 25 knots. Snow showers
likely. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY...South winds 15 to 25 knots becoming southwest 20 to
30 knots. Waves subsiding to 2 to 4 feet, then building to 6 to
9 feet occasionally to 11 feet.

$$

LSZ267-162300-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
959 AM EST Thu Nov 16 2017

...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH FRIDAY
AFTERNOON...

.REST OF TODAY...North gales to 35 knots diminishing to 15 to
25 knots. Waves 9 to 12 feet occasionally to 15 feet subsiding to
3 to 5 feet occasionally to 7 feet.
.TONIGHT...Northeast winds 10 to 20 knots becoming southeast
15 to 25 knots by midnight, then increasing to 20 to 30 knots
late. A slight chance of snow after midnight. Waves subsiding to
1 to 3 feet, then building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Southeast gales to 35 knots becoming south gales to
40 knots. A chance of snow in the morning...then a mix of rain
and snow in the afternoon. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY NIGHT...South winds 20 to 30 knots becoming north 10 to
20 knots after midnight. Rain. Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. Rain showers likely. A chance of snow
showers in the afternoon. Waves building to 9 to 12 feet
occasionally to 15 feet.
.SATURDAY NIGHT...North gales to 40 knots. Freezing rain,
possibly mixed with rain showers in the evening, then snow
showers likely after midnight. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet.
.SUNDAY...Northwest winds 20 to 30 knots with a few gale force
gusts to 35 knots becoming west 15 to 25 knots. Snow showers
likely. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY...South winds 15 to 25 knots becoming southwest gales to
35 knots. A chance of rain showers. Waves subsiding to 2 to
4 feet, then building to 6 to 9 feet occasionally to 11 feet.

$$
LSZ261-162300-
MAFOR 1616/
Superior West 11120 12220 12340 12440 11446. Chance of rain late
this evening. Chance of rain and snow overnight through mid
morning Friday. Waves 2 to 6 feet.

Superior North Central 11130 11120 11210 11320 11330 11450 11456
11457. Chance of snow, rain and light freezing rain after
midnight. Chance of snow and rain late tonight through mid
morning Friday. Waves 5 to 8 feet subsiding to 2 to 5 feet this
afternoon and evening building to 5 to 8 feet tonight. Waves 7 to
11 feet Friday morning.

Superior South Central 11840 11120 11110 11210 11330 11440 11450
11457. Chance of snow overnight. Chance of rain and snow through
mid morning Friday morning. Waves 7 to 11 feet subsiding to 4 to
7 feet this afternoon. Waves 3 to 6 feet tonight. Waves 5 to 9
feet Friday morning.

Superior East 11840 11830 11120 11220 12330 11340 11457. Chance
of snow late tonight and Friday morning. Waves 5 to 9 feet
subsiding to 3 to 6 feet this afternoon. Waves 2 to 5 feet
tonight. Waves 5 to 9 feet Friday morning.

$$

KCW

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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