Great Lakes Forecast
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765
FZUS63 KMQT 250841
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
341 AM EST Sat Nov 25 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 29.2 inch low near James Bay will shift to
northeastern Quebec this afternoon. The region will then be
dominated by a strengthening high pressure ridge of 30.1 inches
passing through the central United States late this afternoon
through Sunday morning. A weak 29.9 inch trough will briefly
influence Lake Superior Sunday, followed by another 30.1 inch
ridge overnight. A developing low pressure system of 29.2 inches
will then push through Manitoba and Ontario, reaching the Upper
Great Lakes on late Monday night and into Tuesday. A high pressure
ridge of 30.2 inches returns over the region on Wednesday.

LSZ162-251645-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
341 AM EST Sat Nov 25 2017 /241 AM CST Sat Nov 25 2017/

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. Waves 4 to
7 feet occasionally to 9 feet.
.TODAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to 2 to 4 feet.
.TONIGHT...West winds 10 to 20 knots becoming southwest 15 to
25 knots late. Waves subsiding to calm to 2 feet, then building
to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Southwest winds 20 to 30 knots veering west by late
morning, then diminishing to 10 to 20 knots by mid afternoon.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 1 to 3 feet.
.SUNDAY NIGHT...North winds 5 to 15 knots veering east after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots. Waves building to 1 to
3 feet.
.MONDAY NIGHT...Southwest winds 10 to 20 knots becoming west
20 to 30 knots after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...West gales to 35 knots diminishing to 20 to 30 knots.
Waves building to 5 to 8 feet occasionally to 10 feet, then
subsiding to 1 to 3 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots veering west. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.

$$

LSZ263-251645-
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-
341 AM EST Sat Nov 25 2017

...GALE WARNING IN EFFECT SUNDAY MORNING...

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. Isolated
rain and snow showers. A few gale force gusts to 35 knots. Waves
5 to 8 feet occasionally to 10 feet.
.TODAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. Isolated snow showers in the morning. Waves subsiding
to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...Northwest winds 10 to 20 knots backing west by
midnight, then becoming southwest 20 to 30 knots late. Waves
subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY...Southwest gales to 35 knots becoming west 20 to
30 knots by late morning, then becoming northwest 15 to 25 knots
by mid afternoon. Waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.
.SUNDAY NIGHT...North winds 5 to 15 knots veering east after
midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Southeast winds 5 to 15 knots increasing to 15 to
25 knots in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...South winds 15 to 25 knots becoming west 20 to
30 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...West gales to 35 knots. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots. A chance of snow
showers. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.

$$

LSZ264-251645-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
341 AM EST Sat Nov 25 2017

...GALE WARNING IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
AFTERNOON...

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. A few gale
force gusts to 35 knots. Isolated rain and snow showers. Waves 5
to 8 feet occasionally to 10 feet.
.TODAY...Northwest winds 20 to 30 knots. Isolated snow showers in
the morning. Waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming west 5 to
15 knots by midnight, then becoming southwest 20 to 30 knots
late. Waves subsiding to 1 to 3 feet, then building to 3 to
6 feet occasionally to 8 feet.
.SUNDAY...Southwest gales to 35 knots veering west by late
morning, then becoming northwest 20 to 30 knots by mid afternoon.
Waves building to 7 to 10 feet occasionally to 13 feet, then
subsiding to 4 to 7 feet occasionally to 9 feet.
.SUNDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots increasing to 20 to
30 knots in the afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.MONDAY NIGHT...South winds 20 to 30 knots veering west after
midnight. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.TUESDAY...West gales to 35 knots. Waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots. Waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet.

$$

LSZ265-251645-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
341 AM EST Sat Nov 25 2017

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. A few gale
force gusts to 35 knots. Scattered rain and snow showers. Waves 5
to 8 feet occasionally to 10 feet.
.TODAY...Northwest winds 20 to 30 knots. A few gale force gusts to
35 knots through early afternoon. Scattered snow showers. Waves
building to 6 to 9 feet occasionally to 11 feet, then subsiding to
4 to 7 feet occasionally to 9 feet.
.TONIGHT...Northwest winds 15 to 25 knots backing west by
midnight. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.SUNDAY...Southwest winds 20 to 30 knots veering west by late
morning, then becoming northwest 20 to 30 knots by mid afternoon.
A few gale force gusts to 35 knots. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots becoming north
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming south 20 to
30 knots in the afternoon. Waves building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...South winds 20 to 30 knots veering west after
midnight. Waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...West gales to 35 knots. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.

$$

LSZ266-251645-
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-
341 AM EST Sat Nov 25 2017

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. A few gale
force gusts to 35 knots. Scattered rain and snow showers. Waves 6
to 9 feet occasionally to 11 feet building to 7 to 10 feet
occasionally to 13 feet.
.TODAY...Northwest winds 20 to 30 knots. A few gale force gusts to
35 knots. Scattered snow showers. Waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 6 to 9 feet
occasionally to 11 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight, then backing west late. Isolated snow
showers in the evening. Waves subsiding to 2 to 4 feet.
.SUNDAY...Southwest winds 20 to 30 knots veering west by late
morning, then becoming northwest 20 to 30 knots by mid afternoon.
A few gale force gusts to 35 knots. A slight chance of rain
showers in the afternoon. Waves building to 6 to 10 feet
occasionally to 13 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots becoming north
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming south 20 to
30 knots in the afternoon. Waves subsiding to calm to 2 feet,
then building to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...South gales to 35 knots becoming southwest 20 to
30 knots after midnight. Waves building to 4 to 8 feet
occasionally to 10 feet.
.TUESDAY...West gales to 35 knots veering northwest. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY...South winds 10 to 20 knots becoming southwest 15 to
25 knots. A chance of rain showers, possibly mixed with snow.
Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ267-251645-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
341 AM EST Sat Nov 25 2017

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. A few gale
force gusts to 35 knots. Scattered rain showers, possibly mixed
with snow. Waves 7 to 10 feet occasionally to 13 feet.
.TODAY...Northwest winds 20 to 30 knots. A few gale force gusts to
35 knots. Scattered rain showers in the morning. Scattered snow
showers. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.TONIGHT...North winds 20 to 30 knots becoming northwest 15 to
25 knots by midnight, then backing west late. Scattered snow
showers. Waves subsiding to 2 to 4 feet.
.SUNDAY...Southwest winds 20 to 30 knots becoming west by late
morning, then veering northwest by mid afternoon. A few gale force
gusts to 35 knots. A slight chance of snow showers in the
morning. A slight chance of rain showers. Waves building to 6 to 9
feet occasionally to 11 feet.
.SUNDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots in the afternoon. Waves subsiding to calm to 2 feet,
then building to 2 to 4 feet.
.MONDAY NIGHT...South gales to 35 knots becoming southwest 20 to
30 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...West gales to 35 knots veering northwest. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 7 to 10 feet occasionally to 13 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming south 15 to
25 knots. A chance of rain and snow showers. Waves subsiding to
1 to 3 feet, then building to 3 to 5 feet occasionally to 7 feet.

$$

LSZ261-251645-
MAFOR 2510/
Superior West 12740 13730 11720 11620 11530. Waves 2 to 7 feet.

Superior North Central 14740 12730 11620 11630. Waves 3 to 8 feet.

Superior South Central 14740 11740 11730 11720 11630. Scattered
rain and snow showers early this morning, then scattered snow showers
the rest of today. Waves 5 to 10 feet today subsiding to 2 to 4
feet tonight.

Superior East 14740 11740 11730 11720 11620. Scattered rain and
snow showers early this morning, then scattered snow showers through
early evening. Waves 6 to 10 feet today subsiding to 2 to 4 feet
tonight.


$$

KEC

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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