Great Lakes Forecast
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000
FZUS63 KMQT 112106
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
406 PM EST Sat Nov 11 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 30.6 inch ridge extending from the Saint Lawrence
Valley into the Mid Atlantic States will shift east tonight as a
weak 30.1 inch trough over the north half of Minnesota weakens to
around 30.2 inches as it reaches Lake Superior late tonight into
Sunday. A 30.4 inch high will then move across the Upper Great
Lakes on 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.

LSZ162-120515-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
406 PM EST Sat Nov 11 2017 /306 PM CST Sat Nov 11 2017/

.LATE THIS AFTERNOON...West winds 15 to 25 knots. Scattered rain
and snow showers. Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...West winds 10 to 20 knots veering north by midnight.
Isolated snow showers in the evening. Waves subsiding to calm to
2 feet.
.SUNDAY...North winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots late. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots backing south 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. Waves building to 1 to
3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of rain in the evening, then rain after
midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 20 to 30 knots veering northwest. A
chance of rain. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to calm to 2 feet.
.THURSDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Rain, possibly mixed with snow. Waves building to 3 to
5 feet occasionally to 7 feet.

$$

LSZ263-120515-
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-
406 PM EST Sat Nov 11 2017

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Scattered
rain and snow showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...West winds 10 to 20 knots becoming north 5 to 15 knots
by midnight. Scattered rain and snow showers. Waves subsiding to
calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering northwest by
midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots becoming southwest less
than 10 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. Waves building to 1 to
3 feet.
.TUESDAY...South winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Waves 1 to 3 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of rain in the evening, then rain after
midnight. Waves 1 to 3 feet.
.WEDNESDAY...West winds 20 to 30 knots veering north. A chance of
rain. Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 2 to 4 feet.
.THURSDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Rain, possibly mixed with snow. Waves subsiding to calm
to 2 feet, then building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ264-120515-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
406 PM EST Sat Nov 11 2017

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Numerous
rain showers, possibly mixed with snow. Waves 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Southwest winds 10 to 20 knots becoming north 5 to
15 knots by midnight. Scattered rain and snow showers. Waves
subsiding to calm to 2 feet.
.SUNDAY...North winds 5 to 15 knots backing west by mid
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots veering northwest by
midnight. A slight chance of drizzle and snow showers after
midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds 5 to 15 knots becoming west less than
10 knots in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots. Waves building to 1 to
3 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 after
midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest gales to 35 knots becoming north 20 to
30 knots. A chance of rain and snow. Waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY...East winds 10 to 20 knots becoming south 20 to
30 knots. A chance of snow showers. A chance of rain. Waves
subsiding to calm to 2 feet, then building to 5 to 8 feet
occasionally to 10 feet.

$$

LSZ265-120515-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
406 PM EST Sat Nov 11 2017

.LATE THIS AFTERNOON...Southwest winds 10 to 20 knots. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.TONIGHT...Southwest winds 15 to 25 knots becoming west 10 to
20 knots by midnight, then becoming northwest 5 to 15 knots late.
Waves subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Isolated rain and snow showers in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots backing west by
midnight, then veering northwest late. A slight chance of drizzle
and snow showers. A slight chance of freezing drizzle after
midnight. 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 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. Waves building 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 after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet.
.WEDNESDAY...West gales to 35 knots becoming northwest 20 to
30 knots. Rain likely. A chance of snow. 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.
.THURSDAY...East winds 10 to 20 knots becoming southeast 20 to
30 knots. A chance of rain. Waves subsiding to 1 to 3 feet, then
building to 4 to 7 feet occasionally to 9 feet.

$$

LSZ266-120515-
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-
406 PM EST Sat Nov 11 2017

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. Scattered
rain and snow showers. Waves 4 to 7 feet occasionally to 9 feet
subsiding to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Southwest winds 15 to 25 knots becoming west 10 to
20 knots by midnight, then diminishing to 5 to 15 knots late.
Scattered rain and snow showers. Waves subsiding to calm to
2 feet.
.SUNDAY...Northwest winds 5 to 15 knots. Isolated rain and snow
showers. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 10 to 20 knots. A slight chance
of drizzle and snow showers. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. A slight chance of drizzle in the
morning. 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 likely after midnight. Waves building to
4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...West gales to 35 knots becoming northwest 20 to
30 knots. Rain likely, then a chance of rain and snow showers.
Waves 3 to 5 feet occasionally to 7 feet, then building to 8 to
11 feet occasionally to 14 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.

$$

LSZ267-120515-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
406 PM EST Sat Nov 11 2017

.LATE THIS AFTERNOON...Southwest winds 20 to 30 knots. Rain and
snow showers. Waves 4 to 7 feet occasionally to 9 feet subsiding
to 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Southwest winds 15 to 25 knots becoming west 10 to
20 knots by midnight, then diminishing to 5 to 15 knots late.
Scattered rain and snow showers. Waves subsiding to calm to
2 feet.
.SUNDAY...West winds less than 10 knots backing southwest by late
morning, then becoming west 5 to 15 knots by mid afternoon.
Isolated rain showers. Waves calm to 2 feet.
.SUNDAY NIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots by midnight. A slight chance of drizzle. A slight chance
of snow showers after midnight. Waves calm to 2 feet.
.MONDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. A slight chance of drizzle in the
morning. Waves calm to 2 feet.
.MONDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots. A chance of rain in
the evening, then rain after midnight. Waves building to 3 to
6 feet occasionally to 8 feet.
.WEDNESDAY...West winds 20 to 30 knots veering northwest. Rain,
then a chance of rain and snow showers. Waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.THURSDAY...North winds 10 to 20 knots becoming southeast 20 to
30 knots. A chance of snow showers. A chance of rain. Waves
subsiding to calm to 2 feet, then building to 4 to 7 feet
occasionally to 9 feet.

$$

LSZ261-120515-
MAFOR 1122/
Superior West 11620 11720 11810 13800 11700 11610. Waves 1 to 5
feet through tonight. Waves 1 foot or less Sunday.

Superior North Central 11527 11620 11710 12810 11800 11700 11710.
Scattered rain and snow showers late this evening. Scattered rain
showers after midnight tonight. Waves 2 to 6 feet tonight.
Waves 1 to 2 feet Sunday.

Superior South Central 12520 12620 11710 11700 12710. Waves 1 to
4 feet through tonight. Waves 2 feet or less Sunday.

Superior East 11537 11520 12610 14600. Scattered rain and snow
showers late this evening. Waves 4 to 7 feet subsiding to 1 to 3
feet tonight and Sunday.

$$

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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