791
FZUS63 KMQT 050141
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
941 PM EDT Fri Oct 4 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 over the Upper Midwest
continues across the Great Lakes Basin tonight. As the high moves
to New England and Quebec on Saturday, 29.2 inch low pressure
over southeast Saskatchewan will track across Lake Winnipeg. The
low will then track into northern Ontario during Saturday night
with an associated 29.6 inch trough surging across Lake Superior.
As the low weakens to 29.4 inches while moving to southern Hudson
Bay on Sunday, 30.2 inch high pressure will build over the Plains.
This high will evolve into a north- south oriented 30.2 inch high
pressure ridge that will drift to the Middle and Upper
Mississippi Valley during Monday night and overhead the Great
Lakes by Wednesday.

LSZ162-050945-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
941 PM EDT Fri Oct 4 2024 /841 PM CDT Fri Oct 4 2024/

...GALE WARNING IN EFFECT FROM LATE SATURDAY NIGHT THROUGH SUNDAY
EVENING...

.REST OF TONIGHT...Southwest winds 10 to 20 knots becoming south
15 to 25 knots late. Waves 2 to 4 feet subsiding to 1 to 3 feet.
.SATURDAY...South winds 20 to 30 knots. A chance of showers and a
slight chance of thunderstorms by mid afternoon. Waves building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to 6
feet occasionally to 8 feet.
.SATURDAY NIGHT...West winds 20 to 30 knots increasing to gales
to 40 knots after midnight. A chance of showers and a slight
chance of thunderstorms through midnight. Waves building to 6 to
9 feet occasionally to 11 feet.
.SUNDAY...West gales to 40 knots veering northwest by mid
afternoon. A chance of showers. Waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.SUNDAY NIGHT...Northwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Waves subsiding to 1 to 3 feet.
.MONDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots veering northeast. Waves
calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots. Waves calm to 2 feet.

$$

LSZ263-050945-
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-
941 PM EDT Fri Oct 4 2024

...GALE WARNING IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY
EVENING...

.REST OF TONIGHT...Southwest winds 10 to 20 knots backing south
late. Waves 2 to 4 feet.
.SATURDAY...South winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. A chance of showers and a slight
chance of thunderstorms by late afternoon. Waves building to 5 to
8 feet occasionally to 10 feet.
.SATURDAY NIGHT...South gales to 35 knots becoming west 20 to
30 knots after midnight, then increasing to gales to 40 knots
late. Showers and a slight chance of thunderstorms through
midnight. Waves building to 6 to 9 feet occasionally to 11 feet,
then subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West gales to 45 knots veering northwest by mid
afternoon. A chance of showers. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 8 to 11 feet
occasionally to 14 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots becoming west 15 to
25 knots after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.MONDAY...Northwest winds 15 to 25 knots. Waves subsiding to 2 to
4 feet.
.MONDAY NIGHT...North winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...East winds 5 to 15 knots veering southeast. Waves
calm to 2 feet.

$$

LSZ264-050945-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
941 PM EDT Fri Oct 4 2024

...GALE WARNING IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE
SUNDAY NIGHT...

.REST OF TONIGHT...Southwest winds 10 to 20 knots. Waves 1 to
3 feet building to 2 to 4 feet.
.SATURDAY...South winds 20 to 30 knots increasing to gales to
45 knots in the afternoon. A slight chance of showers by mid
afternoon. Waves building to 10 to 14 feet occasionally to
18 feet.
.SATURDAY NIGHT...South gales to 45 knots becoming west gales to
40 knots after midnight. A slight chance of showers and
thunderstorms through midnight. Waves subsiding to 5 to 8 feet
occasionally to 10 feet, then building to 8 to 11 feet
occasionally to 14 feet.
.SUNDAY...West gales to 40 knots veering northwest by mid
afternoon. A chance of showers. Waves building to 10 to 14 feet
occasionally to 18 feet, then subsiding to 9 to 12 feet
occasionally to 15 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots diminishing to 15 to
25 knots after midnight. Waves subsiding to 3 to 6 feet
occasionally to 8 feet.
.MONDAY...Northwest winds 15 to 25 knots. A chance of showers.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...North winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
.TUESDAY...Northwest winds 10 to 20 knots becoming north 5 to
15 knots. Waves subsiding to calm to 2 feet.
.WEDNESDAY...Northeast winds 5 to 15 knots veering southeast.
Waves calm to 2 feet.

$$

LSZ265-050945-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
941 PM EDT Fri Oct 4 2024

...GALE WARNING IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE
SUNDAY NIGHT...

.REST OF TONIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...South winds 20 to 30 knots increasing to gales to
40 knots in the afternoon. Waves building to 7 to 10 feet
occasionally to 13 feet.
.SATURDAY NIGHT...South gales to 40 knots becoming west gales to
35 knots after midnight, then diminishing to 20 to 30 knots late.
A chance of showers and thunderstorms through midnight. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West gales to 40 knots becoming northwest gales to
45 knots by mid afternoon. Showers likely. Waves building to 6 to
9 feet occasionally to 11 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. Waves subsiding to 2 to 4 feet.
.MONDAY...West winds 15 to 25 knots becoming northwest 20 to
30 knots by mid afternoon. A chance of showers. Waves 2 to
4 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of showers. Waves
subsiding to calm to 2 feet.
.TUESDAY...Northwest winds 10 to 20 knots veering north. Waves
calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ266-050945-
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-
941 PM EDT Fri Oct 4 2024

...GALE WARNING IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE
SUNDAY NIGHT...

.REST OF TONIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots after midnight. Waves calm to 2 feet building to
2 to 4 feet.
.SATURDAY...South winds 20 to 30 knots increasing to gales to
45 knots in the afternoon. Waves building to 10 to 14 feet
occasionally to 18 feet.
.SATURDAY NIGHT...South gales to 45 knots becoming west gales to
40 knots after midnight, then diminishing to 20 to 30 knots late.
A chance of showers and thunderstorms. Waves subsiding to 5 to
8 feet occasionally to 10 feet, then building to 7 to 10 feet
occasionally to 13 feet.
.SUNDAY...West gales to 45 knots veering northwest by mid
afternoon. Showers. Waves building to 10 to 14 feet occasionally
to 18 feet.
.SUNDAY NIGHT...Northwest gales to 35 knots diminishing to 20 to
30 knots after midnight. A chance of showers. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.MONDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A chance of showers. Waves subsiding
to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots veering north
after midnight. A chance of showers. Waves subsiding to 2 to
4 feet.
.TUESDAY...Northwest winds 10 to 20 knots veering north. A chance
of showers. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 10 to 20 knots becoming south 5 to
15 knots. Waves calm to 2 feet.

$$

LSZ267-050945-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
941 PM EDT Fri Oct 4 2024

...GALE WARNING IN EFFECT FROM SATURDAY AFTERNOON THROUGH LATE
SUNDAY NIGHT...

.REST OF TONIGHT...Southwest winds 5 to 15 knots backing south
after midnight, then becoming southwest 10 to 20 knots late.
Waves 1 to 3 feet subsiding to calm to 2 feet.
.SATURDAY...South winds 10 to 20 knots increasing to gales to
35 knots. Waves building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...Southeast gales to 40 knots veering south after
midnight, then becoming west 20 to 30 knots late. Showers and a
chance of thunderstorms. Waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.SUNDAY...West gales to 45 knots. Showers. Waves building to
11 to 15 feet occasionally to 19 feet.
.SUNDAY NIGHT...Northwest gales to 40 knots diminishing to 20 to
30 knots after midnight. A chance of showers. Waves subsiding to
5 to 8 feet occasionally to 10 feet.
.MONDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. A chance of showers. Waves subsiding
to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots after midnight. A chance of showers. Waves
subsiding to 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots veering north. A chance
of showers. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 10 to 20 knots. Waves calm to 2 feet.

$$
LSZ261-050945-
MAFOR 0503/
Superior West...GALE WARNING IN EFFECT...12520 11430 14440 11546.
Waves 2 to 4 feet overnight. Waves 2 to 4 feet building to 3 to 6
feet Saturday.

Superior North Central...GALE WARNING IN EFFECT...13520 11430
11450 11460 11360 11466. Waves 2 to 4 feet overnight building to
8 to 11 feet Saturday. Waves 10 to 14 feet Saturday evening.

Superior South Central...GALE WARNING IN EFFECT...13510 11430
14450. A chance of showers and thunderstorms Saturday evening.
Waves 1 to 2 feet overnight building to 5 to 8 feet Saturday.
Waves 6 to 9 feet Saturday evening.

Superior East...GALE WARNING IN EFFECT...12410 11510 11420 11430
11440 11450 11350. Waves 2 to 3 feet overnight building to 3 to 6
feet Saturday. Waves 5 to 9 feet Saturday evening.

$$

BW

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

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