Great Lakes Forecast
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FZUS63 KMQT 131453
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
953 AM EST Mon Nov 13 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 30.4 inch ridge centered over the Upper Mississippi
Valley builds into the western Great Lakes today. On Tuesday
evening, the ridge axis will be centered over the Appalachians and
northeastern states at 30.3 inches as a low pressure of 29.8
inches organizes and approaches from the west. This low will
strengthen to 29.6 inches as it tracks into the Upper Great Lakes
on Wednesday. A ridge of 30.4 inches will then quickly follow
through central Ontario Thursday as a strengthening trough of 28.9
inches approaches the Great Lakes from the Central Plains on
Friday.

LSZ162-132300-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
953 AM EST Mon Nov 13 2017 /853 AM CST Mon Nov 13 2017/

.REST OF TODAY...West winds 5 to 15 knots backing south. Waves
calm to 2 feet.
.TONIGHT...Southeast winds 5 to 15 knots veering south by
midnight, then increasing to 10 to 20 knots late. A slight chance
of rain showers after midnight. Waves building to 1 to 3 feet.
.TUESDAY...South winds 10 to 20 knots. A slight chance of
drizzle. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering west after
midnight. A chance of drizzle. Waves subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots in the afternoon. Waves building to 3 to 5 feet
occasionally to 7 feet.
.WEDNESDAY NIGHT...North winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.THURSDAY...East winds 10 to 20 knots becoming south 15 to
25 knots. A chance of rain and snow. Waves subsiding to calm to
2 feet, then building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Southwest winds 15 to 25 knots becoming northwest 20 to
30 knots. Rain, possibly mixed with snow. Waves subsiding to calm
to 2 feet, then building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ263-132300-
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-
953 AM EST Mon Nov 13 2017

.REST OF TODAY...West winds 5 to 15 knots backing south by mid
afternoon. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
late. Waves building to 1 to 3 feet.
.TUESDAY...South winds 10 to 20 knots. A slight chance of
drizzle. Waves building to 2 to 4 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. A chance of drizzle. Rain showers likely after
midnight. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.WEDNESDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots in the afternoon. Scattered snow showers and a chance of
drizzle in the afternoon. Waves building to 4 to 7 feet
occasionally to 9 feet.
.WEDNESDAY NIGHT...North winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. A chance of drizzle in the
evening. Scattered snow showers. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...East winds 10 to 20 knots becoming south gales to
35 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.
.FRIDAY...South gales to 35 knots becoming northwest 20 to
30 knots. Rain, possibly mixed with snow. Waves subsiding to 1 to
3 feet, then building to 3 to 6 feet occasionally to 8 feet.

$$

LSZ264-132300-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
953 AM EST Mon Nov 13 2017

.REST OF TODAY...North winds 5 to 15 knotS backing southwest by
mid afternoon. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
late. Waves building to 2 to 4 feet.
.TUESDAY...South winds 10 to 20 knots. A slight chance of drizzle
in the afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.TUESDAY NIGHT...South winds 10 to 20 knots becoming southwest
5 to 15 knots after midnight. A chance of drizzle in the evening,
then rain showers likely after midnight. Waves subsiding to 2 to
4 feet.
.WEDNESDAY...West winds 20 to 30 knots veering to northwest gales
to 35 knots late in the afternoon. A chance of rain showers in
the morning. Scattered snow showers. A chance of drizzle in the
afternoon. Waves building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY NIGHT...North gales to 35 knots becoming north winds
20 to 30 knots. A chance of drizzle in the evening. Scattered snow
showers. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...East winds 10 to 20 knots becoming south gales to
40 knots. A chance of snow showers. A chance of rain. Waves
subsiding to calm to 2 feet, then building to 7 to 10 feet
occasionally to 13 feet.
.FRIDAY...South gales to 40 knots becoming northwest 15 to
25 knots. Rain, possibly mixed with snow. Waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

$$

LSZ265-132300-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
953 AM EST Mon Nov 13 2017

.REST OF TODAY...West winds 10 to 20 knots diminishing to 5 to
15 knots. Isolated rain showers. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
by midnight. Waves building to 2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots. A slight chance of drizzle
in the afternoon. Waves 2 to 4 feet.
.TUESDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. A chance of drizzle in the evening, then rain
showers likely after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...West winds 20 to 30 knots becoming northwest gales
to 35 knots in the afternoon. A chance of rain showers in the
morning, then a chance of drizzle and scattered snow showers in
the afternoon. Waves building to 6 to 9 feet occasionally to
11 feet.
.WEDNESDAY NIGHT...North gales to 35 knots diminishing to 20 to
30 knots after midnight. A chance of drizzle in the evening.
Scattered snow showers. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.THURSDAY...Northeast winds 10 to 20 knots becoming south gales
to 35 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.
.FRIDAY...South gales to 35 knots becoming west 15 to 25 knots.
Rain, possibly mixed with snow. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 1 to 3 feet.

$$

LSZ266-132300-
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-
953 AM EST Mon Nov 13 2017

.REST OF TODAY...North winds 10 to 20 knots backing west by mid
afternoon. Isolated rain showers. Waves calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots increasing to 10 to 20 knots
by midnight. Waves building to 2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. A slight chance of drizzle in the afternoon. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots becoming southwest
15 to 25 knots after midnight. A chance of drizzle in the
evening. Rain showers. Waves building to 4 to 7 feet occasionally
to 9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...West winds 20 to 30 knots becoming northwest gales
to 35 knots in the afternoon. Rain showers likely in the morning,
then a chance of drizzle and scattered snow showers in the
afternoon. Waves building to 7 to 10 feet occasionally to
13 feet.
.WEDNESDAY NIGHT...North gales to 40 knots. A chance of drizzle
in the evening. 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.
.THURSDAY...North winds 15 to 25 knots becoming south gales to
40 knots. A chance of snow showers. A chance of rain. Waves
subsiding to calm to 2 feet, then building to 7 to 10 feet
occasionally to 13 feet.
.FRIDAY...South gales to 40 knots diminishing to 20 to 30 knots.
Rain, possibly mixed with snow. Waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ267-132300-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
953 AM EST Mon Nov 13 2017

.REST OF TODAY...North winds 10 to 20 knots backing west by mid
afternoon. Isolated rain showers. Waves calm to 2 feet.
.TONIGHT...West winds 5 to 15 knots backing south by midnight,
then increasing to 10 to 20 knots late. Waves building to 1 to
3 feet.
.TUESDAY...South winds 15 to 25 knots increasing to 20 to
30 knots. A chance of drizzle in the afternoon. Waves building to
3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...South winds 20 to 30 knots. Rain showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.WEDNESDAY...Southwest winds 15 to 25 knots becoming northwest
20 to 30 knots in the afternoon. Rain showers likely in the
morning, then a chance of drizzle in the afternoon. Waves
building to 6 to 9 feet occasionally to 11 feet.
.WEDNESDAY NIGHT...North gales to 35 knots. A chance of drizzle
in the evening. Scattered snow showers. Waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.THURSDAY...North winds 15 to 25 knots becoming southeast gales
to 35 knots. Waves subsiding to calm to 2 feet, then building to
4 to 7 feet occasionally to 9 feet.
.FRIDAY...Southeast gales to 40 knots becoming south gales to
35 knots. Rain, possibly mixed with snow. Waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.

$$
LSZ261-132300-
MAFOR 1316/
Superior West 11500 11400 12310 11410 12420 11520. Waves 2 to 4
feet.

Superior North Central 11700 11600 12410 14420. Waves 2 to 4 feet.

Superior South Central 12610 11500 12410 11420 12430. Waves 1
foot or less this afternoon building to 3 to 5 feet Tuesday
morning.

Superior East 11810 11700 11600 11500 11510 11420 12430. Waves 1
to 3 feet this afternoon building to 3 to 5 feet Tuesday morning.

$$

Borchardt

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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