Great Lakes Forecast
Issued by NWS

Home | Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
000
FZUS63 KMQT 141502
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1002 AM EST Tue Nov 14 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...High pressure of 30.5 inches over Quebec and New
England will weaken to 30.2 inches as it shifts east to the
Canadian maritimes tonight. A low deepening to 29.5 inches over
Lake Superior on Wednesday will move quickly northeast into
western Quebec on early Thursday. The region will then be briefly
influenced by a high pressure ridge of 30.3 inches centered in
northern Ontario late Thursday into Friday. Another low pressure
system follows at 29.3 inches as it approaches from the southwest
and impacts the Upper Great Lakes region on Friday and Saturday.

LSZ162-142315-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1002 AM EST Tue Nov 14 2017 /902 AM CST Tue Nov 14 2017/

.REST OF TODAY...Southwest winds 10 to 20 knots backing south by
mid afternoon. Patchy drizzle. Waves 1 to 3 feet building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.TONIGHT...South winds 5 to 15 knots veering southwest late.
Areas of fog. Areas of drizzle. A chance of rain after midnight.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots by late morning, then increasing to 20 to 30 knots by
mid afternoon. A chance of rain showers with pockets of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY NIGHT...North winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. Scattered snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.
.THURSDAY...Northeast winds 10 to 20 knots veering east in the
afternoon. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots veering south
after midnight. A chance of rain and snow. Waves building to 3 to
5 feet occasionally to 7 feet.
.FRIDAY...South winds 15 to 25 knots becoming northwest 10 to
20 knots. Rain. A chance of snow. A chance of rain. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
calm to 2 feet.
.SATURDAY...Northwest gales to 35 knots. Scattered snow showers.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ263-142315-
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-
1002 AM EST Tue Nov 14 2017

.REST OF TODAY...Southwest winds 10 to 20 knots backing south by
mid afternoon. Patchy fog and drizzle through noon. Waves 2 to 4
feet.
.TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then veering southwest late. Areas of fog.
Areas of drizzle in the evening. Rain likely after midnight.
Waves subsiding to calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots becoming northwest 15 to
25 knots by late morning, with a few north gale force gusts to 35
knots by mid afternoon. Rain showers in the morning, then a
chance of rain showers with pockets of snow showers in the
afternoon. Waves building to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY NIGHT...North winds 20 to 30 knots with occasional gale
force gusts to 35 knots in the evening. A chance of rain showers
in the evening. Scattered 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...Northeast winds 15 to 25 knots becoming east 10 to
20 knots in the afternoon. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots becoming south
20 to 30 knots after midnight. A chance of rain and snow. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...South winds 20 to 30 knots becoming northwest 10 to
20 knots. Rain. A chance of snow. A chance of rain. Waves
subsiding to 1 to 3 feet.
.SATURDAY...Northwest gales to 35 knots. Scattered snow showers.
Waves building to 5 to 8 feet occasionally to 10 feet.

$$

LSZ264-142315-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1002 AM EST Tue Nov 14 2017

...GALE WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH THURSDAY
MORNING...

.REST OF TODAY...Southwest winds 10 to 20 knots backing south by
mid afternoon. Waves 2 to 4 feet.
.TONIGHT...South winds 10 to 20 knots diminishing to 5 to
15 knots by midnight. Areas of fog. Patchy drizzle in the
evening. Rain likely after midnight. Waves subsiding to 1 to
3 feet.
.WEDNESDAY...West winds 5 to 15 knots becoming northwest 15 to
25 knots by late morning, then becoming north gales to 35 knots
by mid afternoon. Rain showers. Scattered snow showers in the
afternoon. Waves building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...North gales to 40 knots. Scattered snow
showers. Waves building to 10 to 14 feet occasionally to 18 feet,
then subsiding to 7 to 10 feet occasionally to 13 feet.
.THURSDAY...Northeast winds 15 to 25 knots becoming east 5 to
15 knots in the afternoon. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots becoming south
gales to 35 knots after midnight. Snow, possibly mixed with rain
after midnight. 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 northwest 15 to
25 knots. Rain, possibly mixed with snow. Waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...Northwest gales to 40 knots. Numerous snow showers.
Waves building to 8 to 11 feet occasionally to 14 feet.

$$

LSZ265-142315-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1002 AM EST Tue Nov 14 2017

...GALE WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH THURSDAY
MORNING...

.REST OF TODAY...South winds 10 to 20 knots increasing to 15 to
25 knots. Waves 1 to 3 feet building to 2 to 4 feet.
.TONIGHT...South winds 10 to 20 knots. Areas of fog. Areas of
drizzle in the evening. Rain after midnight. Waves subsiding to
1 to 3 feet, then building to 2 to 4 feet.
.WEDNESDAY...West winds 10 to 20 knots increasing to 15 to
25 knots by late morning, then becoming northwest gales to
35 knots by mid afternoon. Rain showers. Numerous snow showers in
the afternoon. Waves subsiding to calm to 2 feet, then building
to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY NIGHT...North gales to 40 knots. Numerous snow
showers, possibly mixed with rain in the evening, then scattered
snow showers after midnight. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet.
.THURSDAY...North winds 15 to 25 knots becoming northeast 5 to
15 knots in the afternoon. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots becoming south
gales to 35 knots after midnight. A chance of rain and snow after
midnight. 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 15 to
25 knots. Rain, possibly mixed with snow. Waves building to 7 to
10 feet occasionally to 13 feet, then subsiding to 1 to 3 feet.
.SATURDAY...Northwest gales to 40 knots. Numerous snow showers.
Waves building to 8 to 11 feet occasionally to 14 feet.

$$

LSZ266-142315-
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-
1002 AM EST Tue Nov 14 2017

...GALE WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH THURSDAY
MORNING...

.REST OF TODAY...South winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. Patchy fog late through noon. Patchy
drizzle. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...South winds 15 to 25 knots. Areas of fog. Patchy
drizzle in the evening. Rain after midnight. Waves subsiding to
3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...Southwest winds 10 to 20 knots becoming west 15 to
25 knots by late morning, then becoming northwest gales to
35 knots by mid afternoon. Rain showers. Waves subsiding to 1 to
3 feet, then building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...North gales to 40 knots. Numerous snow
showers, possibly mixed with rain in the evening, then isolated
snow showers after midnight. Waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 10 to 14 feet
occasionally to 18 feet.
.THURSDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Southeast winds 15 to 25 knots becoming south
gales to 35 knots after midnight. A chance of rain and snow after
midnight. Waves subsiding to calm to 2 feet, then building to
5 to 8 feet occasionally to 10 feet.
.FRIDAY...South gales to 40 knots becoming northwest 20 to
30 knots. A chance of snow. Rain. Snow likely. Waves building to
10 to 14 feet occasionally to 18 feet, then subsiding to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...Northwest gales to 40 knots. Scattered snow showers,
possibly mixed with rain, then numerous snow showers. Waves
building to 10 to 14 feet occasionally to 18 feet.

$$

LSZ267-142315-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1002 AM EST Tue Nov 14 2017

...GALE WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH THURSDAY
MORNING...

.REST OF TODAY...South winds 20 to 30 knots. Patchy fog through
noon. Areas of drizzle. Waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet.
.TONIGHT...South winds 20 to 30 knots diminishing to 15 to
25 knots by midnight, then increasing to 20 to 30 knots late.
Areas of fog. Areas of drizzle in the evening. Rain after
midnight. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...South winds 15 to 25 knots veering west by late
morning, then increasing to 20 to 30 knots by mid afternoon. Rain
showers. Waves subsiding to 1 to 3 feet, then building to 3 to
6 feet occasionally to 8 feet.
.WEDNESDAY NIGHT...North gales to 40 knots. Rain showers likely
with pockets of snow showers in the evening, then scattered snow
showers, possibly mixed with rain after midnight. Waves building
to 10 to 14 feet occasionally to 18 feet, then subsiding to 8 to
11 feet occasionally to 14 feet.
.THURSDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots becoming southeast
20 to 30 knots after midnight. Waves subsiding to calm to 2 feet,
then building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...South gales to 40 knots. A chance of snow. Rain. Waves
building to 8 to 11 feet occasionally to 14 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest gales to 45 knots. Rain showers likely.
Numerous snow showers. Waves building to 10 to 14 feet
occasionally to 18 feet.

$$
LSZ261-142315-
MAFOR 1416/
Superior West 12520 11420 11410 11415 11506 11626 11620. Patchy
drizzle this evening. Chance of rain with areas of drizzle
overnight. Chance of rain showers Wednesday morning. Waves 1 to 4
feet.

Superior North Central 11520 12420 11423 11413 11416 11516 11616.
Patchy fog overnight. Patchy drizzle late this evening. Chance of
rain with patchy drizzle overnight. Waves 1 to 4 feet.

Superior South Central 13430 11423 11425 11426 11526 11626.
Patchy fog. Patchy drizzle this evening. Waves 1 to 5 feet.

Superior East 13435 11430 11425 11426 11436 11536. Patchy fog
through this evening. Chance of rain with areas of drizzle
overnight. Waves 3 to 6 feet.

$$

Kluber

Experimental modernized open lake forecast is available online at
weather.gov/mqt/glftable

Graphical marine forecasts are available online at:
weather.gov/greatlakes



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.