Great Lakes Forecast
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FZUS63 KMQT 120911
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
411 AM EST Sun Nov 12 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 weak 30.2 inch trough will move across Lake
Superior today into this evening. A 30.4 inch high pressure ridge
will then move across the Upper Great Lakes tonight and Monday.
High pressure will reach the Lower Great Lakes on Tuesday, as a
29.5 inch low pushes east out of the Canadian Rockies. This low
will track to near Lake Winnipeg and towards Hudson Bay Tuesday
night through Wednesday, pushing a 29.7 inch trough across the
Upper Great Lakes. The trough exits the Upper Great Lakes
Wednesday night as 30.0 inch ridge follows south across the Upper
Great Lakes on Thursday.

LSZ162-121715-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
411 AM EST Sun Nov 12 2017 /311 AM CST Sun Nov 12 2017/

.EARLY THIS MORNING...North winds 10 to 20 knots. Waves calm to
2 feet.
.TODAY...Northwest winds 5 to 15 knots backing west by late
morning, then increasing to 10 to 20 knots by mid afternoon.
Waves calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots veering northwest by
midnight, then diminishing to 5 to 15 knots late. Waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing south by late morning,
then backing southeast by mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. A slight chance of
drizzle after midnight. Waves building to 1 to 3 feet.
.TUESDAY...South winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Southwest winds 10 to 20 knots. A chance of rain
in the evening, then rain showers likely after midnight. Waves
1 to 3 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots veering north. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
1 to 3 feet.
.THURSDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. Rain and snow likely. Waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ263-121715-
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-
411 AM EST Sun Nov 12 2017

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves calm to
2 feet.
.TODAY...North winds 5 to 15 knots backing west by late morning,
then increasing to 10 to 20 knots by mid afternoon. A slight
chance of rain and snow showers in the afternoon. Waves calm to
2 feet.
.TONIGHT...West winds 10 to 20 knots becoming northwest 5 to
15 knots by midnight. A slight chance of rain and snow showers in
the evening. Waves building to 1 to 3 feet, then subsiding to
calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots backing southwest by late
morning, then backing south by mid afternoon. Waves calm to
2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.TUESDAY...South winds 10 to 20 knots. Waves building to 2 to
4 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of rain in the evening, then rain
showers after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 20 to 30 knots veering north. A
chance of rain showers. A chance of snow showers and drizzle.
Waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...East winds 10 to 20 knots becoming southeast 20 to
30 knots. A chance of snow showers. A chance of rain. Waves
subsiding to 1 to 3 feet, then building to 5 to 8 feet
occasionally to 10 feet.

$$

LSZ264-121715-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
411 AM EST Sun Nov 12 2017

.EARLY THIS MORNING...North winds 5 to 15 knots. Waves 1 to
3 feet subsiding to calm to 2 feet.
.TODAY...North winds 5 to 15 knots becoming northwest less than
10 knots by late morning, then becoming west 5 to 15 knots by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots veering northwest by
midnight. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.MONDAY...North winds 5 to 15 knots diminishing to less than
10 knots by late morning, then becoming south 5 to 15 knots by
mid afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 2 to 4 feet.
.TUESDAY...South winds 10 to 20 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of rain in the evening, then rain
showers after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest gales to 35 knots veering north. A chance
of rain showers. A chance of snow showers and drizzle. Waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet.
.THURSDAY...East winds 15 to 25 knots becoming southeast gales to
35 knots. Snow, possibly mixed with rain. Waves subsiding to 1 to
3 feet, then building to 7 to 10 feet occasionally to 13 feet.

$$

LSZ265-121715-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
411 AM EST Sun Nov 12 2017

.EARLY THIS MORNING...Northwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TODAY...Northwest winds 5 to 15 knots backing west by late
morning, then increasing to 10 to 20 knots by mid afternoon. A
slight chance of rain and snow showers. Waves calm to 2 feet.
.TONIGHT...West winds 10 to 20 knots veering northwest late. A
slight chance of rain showers in the evening. Isolated snow
showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots becoming west 5 to
15 knots. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. A chance of rain in the evening, then rain
showers after midnight. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest gales to 35 knots veering north. Rain
showers likely. A chance of snow showers and drizzle. A chance of
rain showers. Waves building to 8 to 11 feet occasionally to
14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet.
.THURSDAY...Northeast winds 15 to 25 knots becoming southeast
20 to 30 knots. A chance of snow showers. Rain and snow likely.
Waves subsiding to 1 to 3 feet, then building to 6 to 9 feet
occasionally to 11 feet.

$$

LSZ266-121715-
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-
411 AM EST Sun Nov 12 2017

.EARLY THIS MORNING...Northwest winds 10 to 20 knots. A slight
chance of rain and snow showers. Waves 1 to 3 feet subsiding to
calm to 2 feet.
.TODAY...Northwest winds 5 to 15 knots. A slight chance of rain
and snow showers. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots becoming northwest 10 to
20 knots by midnight. A slight chance of rain and snow showers.
Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by late morning, then backing west by mid afternoon. A
slight chance of drizzle and isolated snow showers in the
morning. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 15 to
25 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...South winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots. A chance of rain in
the evening, then rain showers after midnight. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Northwest gales to 40 knots veering north. A chance
of rain showers, snow showers and drizzle. Waves building to
10 to 14 feet occasionally to 18 feet, then subsiding to 7 to
10 feet occasionally to 13 feet.
.THURSDAY...North winds 20 to 30 knots becoming southeast gales
to 35 knots. A chance of snow showers. A chance of rain. Waves
subsiding to 1 to 3 feet, then building to 7 to 10 feet
occasionally to 13 feet.

$$

LSZ267-121715-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
411 AM EST Sun Nov 12 2017

.EARLY THIS MORNING...West winds 5 to 15 knots. A slight chance
of rain and snow showers. Waves calm to 2 feet.
.TODAY...West winds 5 to 15 knots increasing to 10 to 20 knots by
mid afternoon. Isolated snow showers in the morning. A slight
chance of rain showers. Waves calm to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots. A slight chance of
rain and snow showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Isolated snow showers in the morning.
A slight chance of drizzle. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots. A chance of rain in
the evening, then rain showers after midnight. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...West gales to 35 knots becoming north gales to
40 knots. A chance of drizzle. Rain showers. Snow showers and
drizzle likely. Waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 7 to 10 feet occasionally to 13 feet.
.THURSDAY...North winds 20 to 30 knots veering southeast. Waves
subsiding to calm to 2 feet, then building to 5 to 8 feet
occasionally to 10 feet.

$$

LSZ261-121715-
MAFOR 1210/
Superior West 11800 12700 13620 12710. Waves 2 feet or less
today. Waves 1 to 3 feet tonight.

Superior North Central 12800 11700 13610 12710. Waves 1 to 2
feet.

Superior South Central 11710 12700 14610 11710. Waves 2 feet or
less.

Superior East 13600 12700 13710. Waves 1 to 2 feet.

$$

Voss

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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