525
FZUS63 KMQT 081457
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
957 AM EST Fri Nov 8 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...High pressure of 30.3 inches currently moving into the
Upper Mississippi Valley will build to 30.4 inches as it shifts
across the Upper Great Lakes this evening and reaches the Lower
Great Lakes for Saturday morning. As the high shifts into the
northeast states during Saturday, 29.1 inch low pressure will track
east to northern Hudson Bay while a second low pressure of 29.7
inches lifts northeast over the central Plains. That second low will
drift to northwest Iowa by Saturday morning as the high over the
northeast states settles along the Mid-Atlantic Coast. As the low
then deepens to 29.6 inches while tracking across the Upper Great
Lakes during Sunday, a second low of 29.6 inches will move east to
southern Manitoba. The Manitoba low will then deepen to 29.4 inches
as it tracks across northern Ontario Sunday night and Monday. In its
wake, high pressure will build from 30.1 inches to 30.4 inches as it
moves across northern Ontario during Monday night and Tuesday and
into southern Quebec during Tuesday night. To the west, a 29.5 inch
trough will emerge over the Northern Plains on Tuesday.

LSZ162-082300-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
957 AM EST Fri Nov 8 2024 /857 AM CST Fri Nov 8 2024/

.REST OF TODAY...Northwest winds 10 to 20 knots veering north by
late morning, then becoming west 5 to 15 knots by mid afternoon.
Waves 2 to 4 feet subsiding to calm to 2 feet.
.TONIGHT...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots. A slight chance of rain showers late. Waves building to
2 to 4 feet, then subsiding to 1 to 3 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots backing east after
midnight. A chance of showers in the evening, then showers likely
after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots veering west in the
afternoon. Rain showers in the morning, then a chance of rain
showers in the afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A chance of rain showers. Waves building
to 3 to 5 feet occasionally to 7 feet.
.MONDAY...Northwest winds 20 to 30 knots becoming east 10 to
20 knots. Waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to calm to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots veering south. Waves
building to 2 to 4 feet.

$$

LSZ263-082300-
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-
957 AM EST Fri Nov 8 2024

.REST OF TODAY...Northwest winds 15 to 25 knots veering north by
late morning, then becoming northwest 5 to 15 knots by mid
afternoon. Waves 3 to 6 feet occasionally to 8 feet subsiding to
calm to 2 feet.
.TONIGHT...Southeast winds less than 10 knots becoming south 5 to
15 knots by midnight, then increasing to 10 to 20 knots late.
Waves building to 1 to 3 feet.
.SATURDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. A chance of showers. Waves
subsiding to calm to 2 feet.
.SUNDAY...Southeast winds 5 to 15 knots veering west in the
afternoon. Showers. Waves calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots increasing to 20 to
30 knots after midnight. A chance of rain showers. Waves building
to 3 to 5 feet occasionally to 7 feet.
.MONDAY...Northwest gales to 35 knots becoming north 15 to
25 knots. Waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to calm to 2 feet.
.TUESDAY...Southeast winds 15 to 25 knots veering south. Waves
building to 2 to 4 feet.

$$

LSZ264-082300-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
957 AM EST Fri Nov 8 2024

.REST OF TODAY...Northwest winds 20 to 30 knots diminishing to
10 to 20 knots. Waves 5 to 8 feet occasionally to 10 feet
subsiding to 2 to 4 feet.
.TONIGHT...North winds 5 to 15 knots veering south by midnight,
then increasing to 10 to 20 knots late. Waves subsiding to calm
to 2 feet, then building to 1 to 3 feet.
.SATURDAY...Southwest winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...South winds 5 to 15 knots. A chance of showers.
Waves subsiding to 1 to 3 feet.
.SUNDAY...Southeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. Showers likely. Waves 1 to 3 feet.
.SUNDAY NIGHT...West winds 5 to 15 knots increasing to 20 to
30 knots after midnight. A chance of rain showers. Waves
subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY...Northwest gales to 40 knots becoming north 20 to
30 knots. Waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Waves subsiding to calm to 2 feet, then building to 3
to 6 feet occasionally to 8 feet.

$$

LSZ265-082300-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
957 AM EST Fri Nov 8 2024

.REST OF TODAY...Northwest winds 20 to 30 knots diminishing to
15 to 25 knots by late morning, then becoming north 10 to
20 knots by mid afternoon. Waves 4 to 7 feet occasionally to
9 feet subsiding to 3 to 5 feet occasionally to 7 feet.
.TONIGHT...North winds 5 to 15 knots veering south by midnight,
then increasing to 10 to 20 knots late. Waves subsiding to calm
to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots backing south. Waves
calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. A slight chance of
showers in the evening, then showers likely after midnight. Waves
building to 1 to 3 feet, then subsiding to calm to 2 feet.
.SUNDAY...Southeast winds 15 to 25 knots becoming south 10 to
20 knots in the afternoon. Showers. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Showers likely in the evening, then a
chance of showers after midnight. Waves building to 2 to 4 feet.
.MONDAY...Northwest gales to 35 knots becoming north 20 to
30 knots. A chance of rain showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 2 to 4 feet.
.TUESDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Waves subsiding to calm to 2 feet, then building to 1
to 3 feet.

$$

LSZ266-082300-
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-
957 AM EST Fri Nov 8 2024

.REST OF TODAY...Northwest winds to 30 knots becoming north 20 to
30 knots by early afternoon, then diminishing to 15 to 25 knots
by mid afternoon. Waves 8 to 11 feet occasionally to 14 feet
subsiding to 4 to 7 feet occasionally to 9 feet.
.TONIGHT...North winds 10 to 20 knots becoming southeast 5 to
15 knots by midnight, then becoming south 10 to 20 knots late.
Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers after midnight.
Waves subsiding to 1 to 3 feet.
.SUNDAY...Southeast winds 10 to 20 knots. Showers. Waves building
to 2 to 4 feet, then subsiding to 1 to 3 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Showers. Waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet.
.MONDAY...Northwest gales to 40 knots becoming north 20 to
30 knots. Rain showers, then a chance of rain showers. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Southeast winds 10 to 20 knots becoming south 15 to
25 knots. Waves subsiding to 1 to 3 feet, then building to 3 to 6
feet occasionally to 8 feet.

$$

LSZ267-082300-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
957 AM EST Fri Nov 8 2024

.REST OF TODAY...Northwest winds to 30 knots veering north by
late morning, then diminishing to 20 to 30 knots by mid afternoon.
Waves 8 to 11 feet occasionally to 14 feet subsiding to 4 to 7
feet occasionally to 9 feet.
.TONIGHT...North winds 10 to 20 knots becoming east 5 to 15 knots
by midnight, then becoming south 10 to 20 knots late. Waves
subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots increasing to 15 to
25 knots. Waves building to 2 to 4 feet.
.SATURDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of showers after midnight.
Waves subsiding to 1 to 3 feet.
.SUNDAY...Southeast winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Showers. Waves subsiding to calm to
2 feet.
.SUNDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Showers. Waves building to 2 to 4 feet.
.MONDAY...Northwest gales to 40 knots becoming north 20 to
30 knots. Rain showers, then a chance of rain showers. Waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 2 to 4 feet.
.TUESDAY...Southeast winds 10 to 20 knots increasing to 15 to
25 knots. A chance of rain showers. Waves subsiding to calm to
2 feet, then building to 3 to 5 feet occasionally to 7 feet.

$$
LSZ261-082300-
MAFOR 0816/
Superior West 11820 11700 11600 11400 12410 12520. Waves 1 to 4
feet.

Superior North Central 11740 12720 11800 11300 11420 11520 11530.
Waves 3 to 7 feet this afternoon. Waves 1 to 5 feet tonight and
Saturday morning.

Superior South Central 11840 11830 11820 11810 11200 11410 12420.
Waves 5 to 8 feet this afternoon subsiding to 1 to 3 feet tonight
and Saturday morning.

Superior East 12840 11830 11820 11100 11310 12420. Waves 8 to 11
feet subsiding to 5 to 8 feet this afternoon and to 1 to 4 feet
tonight and Saturday morning.

$$

Rolfson

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

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