Great Lakes Forecast
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FZUS63 KMQT 240833
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
333 AM EST Fri Nov 24 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 over western Ontario this morning will
move to western Quebec this evening as it drags a trough
averaging 29.3 inches across Lake Superior. The region will then
be dominated by a strengthening high of 30.1 inches passing
through the central United States Saturday through Monday morning.
A developing low pressure system of 29.2 inches will then push
through Manitoba and Ontario and impact the region Monday night
and into Tuesday.

LSZ162-241645-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
333 AM EST Fri Nov 24 2017 /233 AM CST Fri Nov 24 2017/

.EARLY THIS MORNING...Southwest winds 15 to 25 knots. Waves 4 to
7 feet occasionally to 9 feet.
.TODAY...Southwest winds 15 to 25 knots veering west by mid
afternoon. A chance of rain. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...West winds 20 to 30 knots veering northwest late.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Northwest winds 15 to 25 knots becoming west 10 to
20 knots by mid afternoon. A slight chance of snow showers in the
morning. Waves subsiding to 1 to 3 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots in the afternoon. Waves subsiding to 1 to 3 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots backing southeast
after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming southwest 15 to
25 knots. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.TUESDAY...West winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 1 to 3 feet.

$$

LSZ263-241645-
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-
333 AM EST Fri Nov 24 2017

...GALE WARNING IN EFFECT UNTIL 10 AM EST THIS MORNING...

.EARLY THIS MORNING...Southwest winds 20 to 30 knots. Gale force
gusts to 35 knots. Waves 5 to 8 feet occasionally to 10 feet.
.TODAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots by late morning, then veering west by mid afternoon. Gale
force gusts to 35 knots through mid morning. A chance of rain in
the morning, then rain likely in the afternoon. Waves building to
6 to 9 feet occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...West winds 20 to 30 knots veering northwest by
midnight. A few gale force gusts to 35 knots. Isolated rain and
snow showers after midnight. Waves building to 5 to 9 feet
occasionally to 11 feet.
.SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A slight chance of snow showers in the
morning. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots increasing to 20 to
30 knots after midnight. Waves subsiding to 1 to 3 feet, then
building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West winds 20 to 30 knots becoming northwest 10 to
20 knots in the afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 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 becoming south 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.TUESDAY...West winds 15 to 25 knots veering northwest. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
2 to 4 feet.

$$

LSZ264-241645-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
333 AM EST Fri Nov 24 2017

...GALE WARNING IN EFFECT UNTIL 10 AM EST THIS MORNING...

.EARLY THIS MORNING...Southwest winds 20 to 30 knots. Gale force
gusts to 35 knots. A slight chance of rain. Waves 4 to 8 feet
occasionally to 10 feet.
.TODAY...Southwest winds 20 to 30 knots becoming west 15 to
25 knots. Gale force gusts to 35 knots through mid morning. Rain
likely. 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 20 to 30 knots. A few gale force gusts
to 35 knots. A slight chance of rain. Isolated snow showers after
midnight. Waves building to 7 to 10 feet occasionally to 13 feet.
.SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots increasing to 20 to
30 knots after midnight. Waves subsiding to 1 to 3 feet, then
building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY NIGHT...North winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.MONDAY...Southeast winds 20 to 30 knots veering south. A chance
of snow showers. A chance of rain showers. Waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...West winds 20 to 30 knots veering northwest. Waves
subsiding to 3 to 5 feet occasionally to 7 feet, then building to
5 to 8 feet occasionally to 10 feet.

$$

LSZ265-241645-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
333 AM EST Fri Nov 24 2017

...GALE WARNING IN EFFECT UNTIL 10 AM EST THIS MORNING...

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

$$

LSZ266-241645-
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-
333 AM EST Fri Nov 24 2017

...GALE WARNING IN EFFECT UNTIL 10 AM EST THIS MORNING...

.EARLY THIS MORNING...Southwest winds 20 to 30 knots. Gale force
gusts to 35 knots. A slight chance of rain. Waves 6 to 9 feet
occasionally to 11 feet.
.TODAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots. Gale force gusts to 35 knots through mid morning. A
chance of rain in the morning, then rain likely in the afternoon.
Waves building to 7 to 10 feet occasionally to 13 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 20 to 30 knots. A few gale force gusts to 35
knots. Rain. Scattered snow showers after midnight. Waves
building to 9 to 12 feet occasionally to 15 feet.
.SATURDAY...Northwest winds 20 to 30 knots. A few gale force gusts
to 35 knots. A chance of rain showers in the morning. A chance of
snow showers. Waves subsiding to 5 to 8 feet occasionally to 10
feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots backing west
after midnight. A slight chance of snow showers. Waves subsiding
to 2 to 4 feet, then building to 3 to 6 feet occasionally to
8 feet.
.SUNDAY...West winds 20 to 30 knots veering northwest in the
afternoon. Waves building to 5 to 8 feet occasionally to 10 feet.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...South winds 20 to 30 knots. A chance of rain showers.
Waves subsiding to calm to 2 feet, then building to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY...West winds 20 to 30 knots veering northwest. A chance
of snow showers. Waves subsiding to 3 to 6 feet occasionally to
8 feet, then building to 7 to 10 feet occasionally to 13 feet.

$$

LSZ267-241645-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
333 AM EST Fri Nov 24 2017

...GALE WARNING IN EFFECT UNTIL 10 AM EST THIS MORNING...

.EARLY THIS MORNING...South winds 20 to 30 knots. Gale force gusts
to 35 knots. A chance of rain. Waves 5 to 9 feet occasionally to
11 feet.
.TODAY...Southwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Gale force gusts to 35 knots through
mid morning. Rain likely. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...West winds 20 to 30 knots becoming northwest by
midnight. A few gale force gusts to 35 knots. Rain likely in the
evening, then scattered rain showers, possibly mixed with snow
after midnight. Waves building to 9 to 12 feet occasionally to 15
feet.
.SATURDAY...Northwest winds 20 to 30 knots. A few gale force gusts
to 35 knots. A chance of rain showers in the morning. A chance of
snow showers. Waves subsiding to 5 to 8 feet occasionally to 10
feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots backing west
after midnight. A slight chance of snow showers. Waves subsiding
to 2 to 4 feet, then building to 3 to 5 feet occasionally to
7 feet.
.SUNDAY...West winds 20 to 30 knots becoming northwest gales to
35 knots in the afternoon. A chance of snow showers, possibly
mixed with rain. Waves building to 5 to 9 feet occasionally to
11 feet.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...South winds 15 to 25 knots increasing to gales to
35 knots. A chance of rain showers, possibly mixed with snow.
Waves subsiding to calm to 2 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.TUESDAY...West winds 20 to 30 knots veering northwest. A chance
of snow showers. Waves subsiding to 3 to 5 feet occasionally to
7 feet, then building to 7 to 10 feet occasionally to 13 feet.

$$

LSZ261-241645-
MAFOR 2410/
Superior West...Gale Warning in effect...12550 11530 11630 12640
12740. Chance of rain from late morning on today. Waves 3 to 8
feet.

Superior North Central...Gale Warning in effect...12550 12636
11640 13750. Chance of rain late this morning and early this
evening. Waves 4 to 9 feet.

Superior South Central...Gale Warning in effect...11550 11540
12526 12640 12750. Chance of rain late this morning early
this evening. Scattered rain and snow showers late tonight. Waves
1 to 6 feet today building to 6 to 10 feet tonight.

Superior East...Gale Warning in effect...12550 12536 11636 11640
12750. Chance of rain late this morning today and this evening.
Scattered rain and snow showers late tonight. Waves 5 to 10 feet
today building to 8 to 12 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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