Great Lakes Forecast
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FZUS63 KMQT 190840
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
340 AM EST Sun Nov 19 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 29.0 inch low over northern Lake Ontario this
morning will move to eastern Quebec by this evening and deepen to
28.8 inches. A 30.4 inch high over the Southern Plains today will
extend a 29.8 inch ridge over Lake Superior into tonight. 29.2 inch
low pressure over southern Saskatchewan Monday morning will pass
north of Lake Superior Monday night and deepen to 29.1 inches and
head to James Bay by Tuesday afternoon. A 30.4 inch high will slide
southeast through the Northern Plains into the Mid-Mississippi
Valley Wednesday, and a 29.9 inch trough will cross the Upper Great
Lakes early Thursday.

LSZ162-191645-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
340 AM EST Sun Nov 19 2017 /240 AM CST Sun Nov 19 2017/

.EARLY THIS MORNING...Northwest winds 15 to 25 knots. Waves 2 to
4 feet.
.TODAY...West winds 15 to 25 knots diminishing to 10 to 20 knots.
Isolated snow showers in the afternoon. Waves subsiding to 1 to
3 feet, then building to 2 to 4 feet.
.TONIGHT...West winds 10 to 20 knots diminishing to 5 to 15 knots
by midnight, then becoming south less than 10 knots late.
Isolated snow showers in the evening. Waves subsiding to calm to
2 feet.
.MONDAY...South winds 10 to 20 knots becoming southwest 15 to
25 knots by mid afternoon. Waves building to 1 to 3 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots becoming west
gales to 35 knots after midnight. A slight chance of rain and
snow showers after midnight. Waves building to 5 to 8 feet
occasionally to 10 feet.
.TUESDAY...Northwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. A chance of snow showers. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.TUESDAY NIGHT...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves building to 2 to
4 feet.
.THURSDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-191645-
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-
340 AM EST Sun Nov 19 2017

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

$$

LSZ264-191645-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
340 AM EST Sun Nov 19 2017

.EARLY THIS MORNING...Northwest winds 15 to 25 knots. Scattered
snow showers. Waves 4 to 7 feet occasionally to 9 feet.
.TODAY...Northwest winds 15 to 25 knots backing west by mid
afternoon. Isolated snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...West winds 15 to 25 knots becoming northwest 10 to
20 knots by midnight, then diminishing to 5 to 15 knots late.
Scattered snow showers. Waves subsiding to 1 to 3 feet.
.MONDAY...South winds 5 to 15 knots increasing to 15 to 25 knots.
Waves subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots becoming west
gales to 35 knots after midnight. A chance of rain showers,
possibly mixed with snow after midnight. Waves building to 7 to
10 feet occasionally to 13 feet.
.TUESDAY...Northwest gales to 35 knots. Snow showers likely in
the morning, then a chance of snow showers in the afternoon.
Waves building to 7 to 11 feet occasionally to 14 feet.
.TUESDAY NIGHT...Northwest gales to 35 knots diminishing to 15 to
25 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...West winds 10 to 20 knots. A chance of snow showers.
Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...West winds 15 to 25 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to calm to 2 feet.

$$

LSZ265-191645-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
340 AM EST Sun Nov 19 2017

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. Scattered
snow showers. Waves 5 to 8 feet occasionally to 10 feet.
.TODAY...Northwest winds 20 to 30 knots backing west by mid
afternoon. Scattered snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...West winds 20 to 30 knots diminishing to 5 to
15 knots. Scattered snow showers. Waves subsiding to calm to
2 feet.
.MONDAY...South winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Southwest winds 20 to 30 knots becoming west
gales to 35 knots after midnight. A slight chance of rain
showers, possibly mixed with snow after midnight. Waves building
to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...Northwest gales to 40 knots. A chance of snow showers,
possibly mixed with rain in the morning, then snow showers in the
afternoon. Waves building to 7 to 10 feet occasionally to
13 feet.
.TUESDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. Snow showers likely in the evening, then
a chance of snow showers after midnight. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.WEDNESDAY...West winds 15 to 25 knots. A chance of snow showers.
Waves subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.THURSDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to calm to 2 feet.

$$

LSZ266-191645-
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-
340 AM EST Sun Nov 19 2017

.EARLY THIS MORNING...Northwest winds 20 to 30 knots. Scattered
snow showers. Waves 7 to 10 feet occasionally to 13 feet.
.TODAY...Northwest winds 20 to 30 knots. Scattered snow showers.
Waves subsiding to 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northwest winds 15 to 25 knots becoming west 10 to
20 knots late. Scattered snow showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.MONDAY...Southwest winds 10 to 20 knots becoming south 15 to
25 knots by late morning, then increasing to 20 to 30 knots by
mid afternoon. A slight chance of snow showers in the morning.
Waves subsiding to 1 to 3 feet, then building to 3 to 6 feet
occasionally to 8 feet.
.MONDAY NIGHT...Southwest gales to 35 knots becoming west 20 to
30 knots after midnight. A chance of rain showers, possibly mixed
with snow after midnight. Waves building to 6 to 9 feet
occasionally to 11 feet.
.TUESDAY...Northwest gales to 40 knots. A chance of snow showers,
possibly mixed with rain in the morning, then snow showers likely
in the afternoon. Waves building to 10 to 14 feet occasionally to
18 feet.
.TUESDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. Snow showers likely in the evening, then
a chance of snow showers after midnight. Waves subsiding to 5 to
8 feet occasionally to 10 feet.
.WEDNESDAY...West winds 15 to 25 knots. A chance of snow showers.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 2 to 4 feet.

$$

LSZ267-191645-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
340 AM EST Sun Nov 19 2017

.TODAY...North winds 20 to 30 knots backing northwest. Numerous
snow showers. Waves 5 to 8 feet occasionally to 10 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. Numerous snow showers in the evening, then
scattered snow showers after midnight. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.MONDAY...West winds 10 to 20 knots becoming south 15 to 25 knots
by late morning, then increasing to 20 to 30 knots by mid
afternoon. A slight chance of snow showers in the morning. Waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...South gales to 35 knots veering southwest after
midnight. A slight chance of rain showers after midnight. Waves
building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY...West gales to 35 knots becoming northwest gales to
40 knots in the afternoon. Rain showers likely in the morning.
Snow showers likely. Waves building to 10 to 14 feet occasionally
to 18 feet.
.TUESDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. Snow showers likely. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...West winds 15 to 25 knots. A chance of snow showers.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of snow showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 2 to 4 feet.

$$

LSZ261-191645-
MAFOR 1910/
Superior West 12730 11620 12630 11620 11610 11500. Scattered snow
showers through early evening tonight. Waves 2 to 4 feet today
subsiding to 1 to 3 feet tonight.

Superior North Central 13730 12630 11730 11720 11710. Scattered
snow showers early this morning and this evening. Waves 4 to 7
feet subsiding to 3 to 5 feet today. Waves 3 to 5 feet subsiding
to 2 to 4 feet tonight.

Superior South Central 12740 12730 11630 11637 11630 11620.
Scattered snow showers today and overnight. Waves 5 to 9 feet
subsiding to 4 to 7 feet today. Waves 3 to 6 feet subsiding to 2
to 4 feet tonight.

Superior East 11847 11837 11737 12747 11737 11730 11720.
Scattered snow showers overnight. Waves 5 to 8 feet.

$$

07

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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