Great Lakes Forecast
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FZUS63 KMQT 110313
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1013 PM EST Fri Nov 10 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 30.7 inch ridge centered over Lake Huron tonight
will shift across the Eastern Great Lakes on Saturday as a weak
30.0 inch trough approaches the Upper Mississippi Valley. This
trough will weaken to around 30.2 inches as it reaches Lake
Superior late Saturday into Sunday. A 30.4 inch high will move
across the Upper Great Lakes on Monday. High pressure will reach
the Lower Great Lakes by Tuesday, as a 29.5 inch low pushes east
out of the Canadian Rockies. This low will track in the vicinity
of Lake Winnipeg Tuesday night, pushing a 29.7 inch trough across
the Upper Great Lakes. The trough exits the Upper Great Lakes on
Wednesday as a 30.0 inch ridge follows.

LSZ162-111115-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1013 PM EST Fri Nov 10 2017 /913 PM CST Fri Nov 10 2017/

.REST OF TONIGHT...South winds 20 to 30 knots. Scattered snow
showers late in the evening, then numerous snow showers after
midnight. Waves 3 to 5 feet occasionally to 7 feet building to
5 to 8 feet occasionally to 10 feet.
.SATURDAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. A slight chance of freezing rain in
the morning. Scattered snow and rain showers. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots veering north late.
Waves subsiding to calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. Waves calm to 2 feet.
.MONDAY...Southwest winds 5 to 15 knots becoming south 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots becoming southwest 15 to
25 knots. Rain likely. Waves building to 2 to 4 feet.
.WEDNESDAY...West winds 15 to 25 knots veering northwest. Waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
calm to 2 feet.

$$

LSZ263-111115-
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-
1013 PM EST Fri Nov 10 2017

.REST OF TONIGHT...South winds 20 to 30 knots. Scattered snow
showers late in the evening, then numerous snow showers after
midnight. Waves 3 to 5 feet occasionally to 7 feet building to
6 to 9 feet occasionally to 11 feet.
.SATURDAY...Southwest winds 20 to 30 knots diminishing to 10 to
20 knots. Scattered snow showers. Isolated rain showers in the
afternoon. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots becoming northwest
5 to 15 knots by midnight, then veering north late. A chance of
rain and snow showers in the evening. A slight chance of drizzle.
Waves subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. Rain likely. Waves building to 3 to 5 feet occasionally
to 7 feet.
.WEDNESDAY...West winds 15 to 25 knots veering northwest. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
calm to 2 feet.

$$

LSZ264-111115-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1013 PM EST Fri Nov 10 2017

.REST OF TONIGHT...South winds 20 to 30 knots. Scattered snow
showers late in the evening, then numerous snow showers after
midnight. Waves 3 to 5 feet occasionally to 7 feet building to
7 to 10 feet occasionally to 13 feet, then subsiding to 6 to
9 feet occasionally to 11 feet.
.SATURDAY...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. Scattered snow showers. Scattered rain showers in
the afternoon. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots veering northwest
by midnight. A chance of snow showers, possibly mixed with rain
in the evening. A slight chance of drizzle. Waves subsiding to
calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY...Northwest winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. Rain. Waves building to 3 to 5 feet occasionally to
7 feet.
.WEDNESDAY...West winds 20 to 30 knots veering northwest. Waves
building to 5 to 8 feet occasionally to 10 feet, then subsiding
to 2 to 4 feet.

$$

LSZ265-111115-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1013 PM EST Fri Nov 10 2017

.REST OF TONIGHT...South winds 20 to 30 knots with a few gale
force gusts to 35 knots by midnight. Scattered snow showers late
in the evening, then numerous snow showers after midnight. Waves 3
to 5 feet occasionally to 7 feet building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.
.SATURDAY...South winds 20 to 30 knots with a few gale force gusts
35 knots becoming southwest 20 to 30 knots by late morning, then
diminishing to 15 to 25 knots by mid afternoon. Scattered snow
showers. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 10 to 20 knots veering west by
midnight. A slight chance of rain and snow showers in the
evening. Waves subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots becoming northwest 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots backing west after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. Rain. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY...West winds 20 to 30 knots veering northwest. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
2 to 4 feet.

$$

LSZ266-111115-
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-
1013 PM EST Fri Nov 10 2017

...GALE WARNING IN EFFECT THROUGH SATURDAY AFTERNOON...

.REST OF TONIGHT...South winds 20 to 30 knots increasing to gales
to 35 knots by midnight. Isolated snow showers late in the
evening, then numerous snow showers after midnight. Waves 3 to
5 feet occasionally to 7 feet building to 7 to 10 feet
occasionally to 13 feet.
.SATURDAY...South gales to 35 knots becoming southwest 20 to
30 knots. Scattered snow showers. Scattered rain showers in the
afternoon. Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.SATURDAY NIGHT...Southwest winds 15 to 25 knots becoming west
10 to 20 knots by midnight. A chance of snow showers, possibly
mixed with rain in the evening. A slight chance of drizzle. Waves
subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.MONDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 10 to 20 knots. Waves building to
1 to 3 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. Rain. Waves building to 4 to 7 feet occasionally to
9 feet.
.WEDNESDAY...West winds 20 to 30 knots veering northwest. A
chance of rain. Waves subsiding to 3 to 6 feet occasionally to
8 feet, then building to 7 to 10 feet occasionally to 13 feet.

$$

LSZ267-111115-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1013 PM EST Fri Nov 10 2017

...GALE WARNING IN EFFECT THROUGH SATURDAY AFTERNOON...

.REST OF TONIGHT...South winds 15 to 25 knots increasing to gales
to 35 knots. Scattered snow showers after midnight. Waves 1 to
3 feet building to 5 to 8 feet occasionally to 10 feet.
.SATURDAY...South gales to 35 knots becoming southwest 20 to
30 knots by mid afternoon. Numerous rain and snow showers. Waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding
to 4 to 7 feet occasionally to 9 feet.
.SATURDAY NIGHT...Southwest winds 15 to 25 knots becoming west
10 to 20 knots by midnight. Rain showers likely in the evening. A
chance of drizzle and snow showers. Waves subsiding to calm to
2 feet.
.SUNDAY...Southwest winds 5 to 15 knots veering west in the
afternoon. A slight chance of drizzle. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots. Waves calm to
2 feet.
.MONDAY...Northwest winds 10 to 20 knots backing west in the
afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...Southwest winds 10 to 20 knots backing south
after midnight. Waves calm to 2 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. Rain. Waves building to 3 to 6 feet occasionally to
8 feet.
.WEDNESDAY...West winds 20 to 30 knots veering northwest. Rain
likely. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 4 to 7 feet occasionally to 9 feet.

$$
LSZ261-111115-
MAFOR 1104/
Superior West 12447 13540 11530 11520 11620. Scattered snow
showers late this evening through mid Saturday morning. Waves 4
to 8 feet overnight subsiding to 2 to 6 feet Saturday and Saturday
evening.

Superior North Central 11440 11457 11450 12540 11530 12520.
Scattered snow showers through early Saturday afternoon...
then scattered snow showers, rain showers and drizzle late
Saturday afternoon through late Saturday evening. Waves 4 to 9
feet subsiding to 3 to 7 feet Saturday and Saturday evening.

Superior South Central...Gale Warning in effect...11440 12457
11450 11540 11530 12520. Scattered snow showers after midnight
overnight through Saturday morning. Waves 3 to 8 feet subsiding
to 1 to 3 feet Saturday evening.

Superior East...Gale Warning in effect...12450 12457 12547 12530.
Scattered snow showers late overnight. Chance of rain and snow
showers and drizzle on Saturday morning through late Saturday
evening. Waves 5 to 10 feet subsiding to 3 to 7 feet Saturday
evening.

$$

JSS

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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