019
FZUS63 KMQT 122024
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
324 PM EST Tue Nov 12 2024

For waters beyond 5 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 high pressure over the Upper Great Lakes
will shift east toward southern Quebec tonight, building to 30.6
inches. To the west, a 29.6 inch trough emerges over the Northern
Plains late today. The trough drifts east over the Midwest late
Wednesday into Wednesday night, weakening to around 29.8 inches.
The trough continues along the southern end of the Great Lakes
Thursday into Thursday night. A 30.1 inch ridge emerges from the
Plains Wednesday night, moving into the Great Lakes for Friday and
Saturday. Deepening low pressure near 29.6 inches emerges out of
the Plains, moving northeast across northern Minnesota Sunday.

LSZ162-130430-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
324 PM EST Tue Nov 12 2024 /224 PM CST Tue Nov 12 2024/

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Waves 1 to
3 feet.
.TONIGHT...South winds 15 to 25 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.WEDNESDAY...South winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then backing southeast by mid
afternoon. A slight chance of showers in the afternoon. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Southeast winds 5 to 15 knots backing east
late. A slight chance of showers. Waves subsiding to calm to
2 feet.
.THURSDAY...Northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. A chance of showers. Waves calm to
2 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots veering east
after midnight. Waves calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...South winds 5 to 15 knots backing southeast after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. A chance of showers. Waves building to 2 to 4 feet.
.SUNDAY...Southwest winds 15 to 25 knots veering west. A chance
of rain showers. Waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to calm to 2 feet.

$$

LSZ263-130430-
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-
324 PM EST Tue Nov 12 2024

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.TONIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots by midnight. Waves building to 3 to 6 feet occasionally
to 8 feet.
.WEDNESDAY...South winds 15 to 25 knots becoming southeast 10 to
20 knots by mid afternoon. Waves subsiding to 2 to 4 feet.
.WEDNESDAY NIGHT...Southeast winds 10 to 20 knots diminishing to
5 to 15 knots by midnight, then backing east late. A slight
chance of showers. Waves subsiding to 1 to 3 feet.
.THURSDAY...Northeast winds 5 to 15 knots. A chance of showers.
Waves 1 to 3 feet.
.THURSDAY NIGHT...Northeast winds 5 to 15 knots becoming east
less than 10 knots after midnight. Waves subsiding to calm to
2 feet.
.FRIDAY...Southwest winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. A chance of rain showers. Waves building to 2 to
4 feet.
.SUNDAY...Southwest winds 20 to 30 knots veering west. A chance
of rain showers. Waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet.

$$

LSZ264-130430-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
324 PM EST Tue Nov 12 2024

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...South winds 15 to 25 knots. Waves building to 5 to
8 feet occasionally to 10 feet.
.WEDNESDAY...South winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. Waves 5 to 8 feet occasionally to
10 feet.
.WEDNESDAY NIGHT...South winds 15 to 25 knots diminishing to
10 to 20 knots by midnight, then becoming southeast 5 to 15 knots
late. A slight chance of showers. Waves subsiding to 2 to 4 feet.
.THURSDAY...East winds 5 to 15 knots. A chance of showers. Waves
subsiding to 1 to 3 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots diminishing to less
than 10 knots after midnight. Waves subsiding to calm to 2 feet.
.FRIDAY...Southwest winds 5 to 15 knots veering west in the
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds less than 10 knots becoming south
5 to 15 knots after midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY...Southwest winds 20 to 30 knots veering west. A chance
of rain showers. Waves subsiding to 3 to 6 feet occasionally to
8 feet.

$$

LSZ265-130430-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
324 PM EST Tue Nov 12 2024

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots late. Waves building to 3 to 6 feet occasionally to
8 feet.
.WEDNESDAY...South winds 20 to 30 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots diminishing to
10 to 20 knots by midnight. A slight chance of showers. Waves
subsiding to 1 to 3 feet.
.THURSDAY...East winds 10 to 20 knots. Showers. Waves subsiding
to calm to 2 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. A chance of showers.
Waves calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.FRIDAY NIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.SATURDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. A chance of showers. Waves building to 2 to 4 feet.
.SUNDAY...South winds 20 to 30 knots becoming west 15 to
25 knots. Showers likely, then a chance of showers. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.

$$

LSZ266-130430-
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-
324 PM EST Tue Nov 12 2024

.LATE THIS AFTERNOON...South winds 15 to 25 knots. Waves 2 to
4 feet.
.TONIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots late. Waves building to 5 to 8 feet occasionally to
10 feet.
.WEDNESDAY...South winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible. Waves 5 to
8 feet occasionally to 10 feet.
.WEDNESDAY NIGHT...Southeast winds 15 to 25 knots diminishing to
10 to 20 knots late. A slight chance of showers after midnight.
Waves subsiding to 2 to 4 feet.
.THURSDAY...East winds 10 to 20 knots. Showers. Waves subsiding
to 1 to 3 feet.
.THURSDAY NIGHT...East winds 5 to 15 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.FRIDAY...West winds 5 to 15 knots. A chance of showers. Waves
calm to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. A chance of showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY...South winds 20 to 30 knots becoming west 15 to
25 knots. Showers, then a chance of showers. Waves subsiding to
3 to 6 feet occasionally to 8 feet.

$$

LSZ267-130430-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
324 PM EST Tue Nov 12 2024

.LATE THIS AFTERNOON...South winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...South winds 15 to 25 knots increasing to 20 to
30 knots late. Waves building to 3 to 6 feet occasionally to
8 feet.
.WEDNESDAY...South winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible by mid
afternoon. Waves building to 4 to 7 feet occasionally to 9 feet.
.WEDNESDAY NIGHT...Southeast winds 20 to 30 knots diminishing to
15 to 25 knots late. A slight chance of showers after midnight.
Waves subsiding to 2 to 4 feet.
.THURSDAY...East winds 10 to 20 knots. Showers. Waves subsiding
to 1 to 3 feet.
.THURSDAY NIGHT...East winds 10 to 20 knots. A chance of showers.
Waves subsiding to calm to 2 feet.
.FRIDAY...Southeast winds 5 to 15 knots veering northwest in the
afternoon. Waves calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots. Waves calm to
2 feet.
.SATURDAY...Southeast winds 5 to 15 knots increasing to 10 to
20 knots. A chance of showers. Waves building to 2 to 4 feet.
.SUNDAY...South winds 15 to 25 knots veering west. Showers, then
a chance of showers. Waves building to 3 to 5 feet occasionally
to 7 feet, then subsiding to 2 to 4 feet.

$$

LSZ261-130430-
MAFOR 1222/
Superior West 11420 15430 11320. Waves 2 to 4 feet subsiding to 1
to 3 feet Wednesday.

Superior North Central 11430 15440 11440. Waves 2 to 4 feet
building to 4 to 7 feet tonight and Wednesday.

Superior South Central 13430 14440 11440. Waves 2 to 3 feet
building to 3 to 6 feet tonight and Wednesday.

Superior East 11420 13430 14440. Waves 1 to 2 feet building to 4
to 7 feet tonight and Wednesday.

$$

BW

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

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