304
FZUS63 KMQT 082011
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
411 PM EDT Tue Oct 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...30.1 inch high pressure slowly drifts from
northwestern Ontario over Lake Superior this evening through
Wednesday. High pressure then builds to 30.3 inches over Lower
Michigan Wednesday night. 29.7 inch low pressure developing over
southern Saskatchewan Thursday deepens to 29.5 inches and supports
a 29.8 inch trough across Lake Superior Friday. High pressure at
30.2 inches over northwestern Ontario clips Lake Superior Saturday
morning before weakening to 30.0 inches on Saturday afternoon,
while low pressure at 29.7 inches approaches from the northern
Plains on Sunday.

LSZ162-090415-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
411 PM EDT Tue Oct 8 2024 /311 PM CDT Tue Oct 8 2024/

.LATE THIS AFTERNOON...Southwest winds 5 to 15 knots. Waves calm
to 2 feet.
.TONIGHT...North winds 5 to 15 knots veering northeast after
midnight, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.WEDNESDAY...Northeast winds 10 to 20 knots veering east in the
afternoon, then diminishing to 5 to 15 knots late. Waves building
to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering south late.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.THURSDAY...South winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. Waves building to 1 to 3 feet, then
subsiding to calm to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots increasing to
10 to 20 knots after midnight. Waves building to 1 to 3 feet.
.FRIDAY...Northwest winds 15 to 25 knots. Waves 1 to 3 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots becoming northwest
15 to 25 knots. Showers likely. Waves building to 2 to 4 feet.
.SUNDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ263-090415-
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-
411 PM EDT Tue Oct 8 2024

.LATE THIS AFTERNOON...West winds 10 to 20 knots. Waves calm to
2 feet.
.TONIGHT...Northwest winds 10 to 20 knots veering north after
midnight, then diminishing to 5 to 15 knots late. Waves building
to 1 to 3 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots veering east late.
Waves subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering south late.
Waves building to 1 to 3 feet, then subsiding to calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.THURSDAY NIGHT...Southwest winds 5 to 15 knots increasing to
15 to 25 knots after midnight. Waves building to 2 to 4 feet.
.FRIDAY...Northwest winds 20 to 30 knots. A chance of showers.
Waves 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 5 to 15 knots becoming northwest 15 to
25 knots. Rain showers likely. Waves building to 2 to 4 feet.
.SUNDAY...North winds 20 to 30 knots. Rain showers likely, then a
chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.

$$

LSZ264-090415-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
411 PM EDT Tue Oct 8 2024

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves 2 to
4 feet.
.TONIGHT...North winds 10 to 20 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.WEDNESDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then veering northeast late. Waves
subsiding to calm to 2 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering south late.
Waves calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots. Waves building to 1 to
3 feet.
.THURSDAY NIGHT...South winds 5 to 15 knots becoming southwest
15 to 25 knots after midnight. Waves building to 2 to 4 feet,
then subsiding to 1 to 3 feet.
.FRIDAY...Northwest winds 20 to 30 knots. A chance of showers.
Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to 1 to 3 feet.
.SATURDAY...West winds 10 to 20 knots becoming north 15 to
25 knots. A chance of showers. Waves subsiding to calm to 2 feet,
then building to 2 to 4 feet.
.SUNDAY...North winds 20 to 30 knots. Rain showers likely, then a
chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet.

$$

LSZ265-090415-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
411 PM EDT Tue Oct 8 2024

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet.
.TONIGHT...Northwest winds 15 to 25 knots veering north after
midnight. Waves building to 3 to 5 feet occasionally to 7 feet.
.WEDNESDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots late. Sprinkles through early afternoon. Waves subsiding
to 1 to 3 feet.
.WEDNESDAY NIGHT...East winds 5 to 15 knots veering south late.
Waves subsiding to calm to 2 feet.
.THURSDAY...South winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves building to 1 to 3 feet.
.THURSDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves 1 to 3 feet.
.FRIDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots by mid afternoon. A chance of showers. Waves building to
3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...West winds 10 to 20 knots backing southwest. Showers
likely. Waves calm to 2 feet.
.SUNDAY...North winds 20 to 30 knots. Showers. Waves building to
3 to 6 feet occasionally to 8 feet.

$$

LSZ266-090415-
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-
411 PM EDT Tue Oct 8 2024

.LATE THIS AFTERNOON...Northwest winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet building to 4 to 7 feet
occasionally to 9 feet.
.TONIGHT...Northwest winds 20 to 30 knots veering north after
midnight. Waves building to 4 to 8 feet occasionally to 10 feet.
.WEDNESDAY...North winds 15 to 25 knots diminishing to 5 to
15 knots. Sprinkles. Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...Northeast winds 5 to 15 knots veering
southeast after midnight, then veering south late. Waves
subsiding to calm to 2 feet.
.THURSDAY...South winds 10 to 20 knots. Waves building to 2 to
4 feet.
.THURSDAY NIGHT...South winds 15 to 25 knots veering southwest
after midnight. Waves 2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots by mid afternoon. A chance of showers. Waves building to
4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. Waves subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 20 knots veering north. Showers
likely. Waves subsiding to calm to 2 feet, then building to 2 to
4 feet.
.SUNDAY...North winds 20 to 30 knots. Rain showers. Waves
building to 4 to 8 feet occasionally to 10 feet.

$$

LSZ267-090415-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
411 PM EDT Tue Oct 8 2024

.LATE THIS AFTERNOON...Northwest winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet building to 4 to 7 feet
occasionally to 9 feet.
.TONIGHT...Northwest winds 20 to 30 knots veering north late.
Waves building to 4 to 8 feet occasionally to 10 feet.
.WEDNESDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Sprinkles through early afternoon.
Waves subsiding to 1 to 3 feet.
.WEDNESDAY NIGHT...North winds 5 to 15 knots veering east after
midnight, then veering south late. Waves subsiding to calm to
2 feet.
.THURSDAY...South winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. Waves calm to 2 feet.
.THURSDAY NIGHT...South winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Waves building to 2 to 4 feet.
.FRIDAY...Southwest winds 15 to 25 knots becoming northwest 20 to
30 knots by mid afternoon. A chance of showers through early
afternoon, then showers likely by mid afternoon. Waves building
to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Northwest winds 20 to 30 knots becoming north
15 to 25 knots after midnight. A chance of showers through
midnight. Waves subsiding to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 20 knots veering east. Showers
likely. Waves subsiding to calm to 2 feet, then building to 1 to
3 feet.
.SUNDAY...North winds 15 to 25 knots increasing to 20 to
30 knots. Showers. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.

$$

LSZ261-090415-
MAFOR 0821/
Superior West 11510 11610 11810 13110 12200. Waves 1 to 3 feet.

Superior North Central 11720 14830 11820 11810 11800. Waves 3 to
5 feet tonight subsiding to 1 to 3 feet Wednesday.

Superior South Central 13730 12830 11820 12810. Waves 3 to 6 feet
tonight subsiding to 2 to 4 feet Wednesday.

Superior East 12740 11730 13830 11820 11810. Waves 4 to 8 feet
tonight subsiding to 2 to 4 feet Wednesday.

$$

JSS

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

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