840
FZUS63 KMQT 222042
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
342 PM EST Fri Nov 22 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...This evening, a 29.3 inch low pressure will continue
to spin near the Mid-Atlantic Coast while a 30.2 inch high
pressure ridge spans the Plains States. Tonight and Saturday, a
29.6 inch trough will develop from the Mid-Atlantic States to
James Bay as the Plains ridge weakens to 30.1 inches while
drifting to the Mississippi Valley. The ridge will weaken further
to 30.0 inches as it shifts across the Upper Great Lakes during
Saturday night and early Sunday. A 29.7 inch low developing over
Colorado and Kansas on Sunday will then lift northeast, reaching
the Upper Great Lakes on Monday. As the low deepens to 29.5 inches
while tracking to southern Quebec on Tuesday, 30.3 inch high
pressure will build southeast into the Middle Mississippi River
Valley. The low will continue to track to the north Tuesday night
and Wednesday as the 30.2 inch high pushes into the Ohio River
Valley.

LSZ162-230445-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
342 PM EST Fri Nov 22 2024 /242 PM CST Fri Nov 22 2024/

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...Northwest winds 10 to 20 knots. Waves calm to 2 feet.
.SATURDAY...Northwest winds 10 to 20 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots veering east late.
Waves calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A slight chance of rain and snow showers in the
afternoon. Waves building to 2 to 4 feet, then subsiding to 1 to
3 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots backing northeast after
midnight. A chance of rain showers, possibly mixed with snow in
the evening, then rain and snow showers likely after midnight.
Waves 1 to 3 feet.
.MONDAY...Northeast winds 15 to 25 knots backing north in the
afternoon. Snow showers. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots. Snow showers
likely in the evening, then a chance of snow showers after
midnight. Waves 2 to 4 feet.
.TUESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of snow showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.

$$

LSZ263-230445-
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-
342 PM EST Fri Nov 22 2024

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Waves 1 to
3 feet.
.TONIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots late. Waves building to 2 to 4 feet.
.SATURDAY...Northwest winds 10 to 20 knots. Waves subsiding to
calm to 2 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots veering northeast
late. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of rain and snow showers. Waves
subsiding to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...Northeast winds 10 to 20 knots backing north in the
afternoon. Rain showers likely in the morning. Snow showers.
Waves building to 2 to 4 feet.
.MONDAY NIGHT...North winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight. Snow showers likely in the
evening. A chance of snow showers after midnight. Waves building
to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. A chance of snow showers. Waves subsiding to calm to
2 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots veering north. Waves
calm to 2 feet.

$$

LSZ264-230445-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
342 PM EST Fri Nov 22 2024

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves 2 to
4 feet.
.TONIGHT...Northwest winds 10 to 20 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 10 to 20 knots. Waves subsiding to
1 to 3 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots by midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering east in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots. A chance of rain
showers. A chance of snow showers after midnight. Waves building
to 1 to 3 feet.
.MONDAY...Northeast winds 10 to 20 knots backing north in the
afternoon. Rain showers likely in the morning. Snow showers
likely. Waves building to 2 to 4 feet.
.MONDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Snow showers in the evening. A chance of
snow showers after midnight. Waves building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. A chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 5 to 15 knots veering north. Waves
subsiding to calm to 2 feet.

$$

LSZ265-230445-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
342 PM EST Fri Nov 22 2024

.LATE THIS AFTERNOON...Northwest winds 20 to 30 knots. A slight
chance of showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots. A slight chance of
rain showers in the evening. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...Northwest winds 15 to 25 knots. A slight chance of
rain showers. A slight chance of snow showers in the afternoon.
Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots by midnight. A slight chance of rain and snow
showers in the evening. Waves subsiding to calm to 2 feet.
.SUNDAY...Northeast winds 5 to 15 knots becoming east 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots becoming north 15 to
25 knots in the afternoon. Rain and snow showers. Waves building
to 1 to 3 feet.
.MONDAY NIGHT...North winds 15 to 25 knots. Rain showers in the
evening. Snow showers. Waves building to 2 to 4 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Snow showers likely. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to calm to 2 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. A chance of snow
showers. Waves calm to 2 feet.

$$

LSZ266-230445-
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-
342 PM EST Fri Nov 22 2024

.LATE THIS AFTERNOON...North winds 20 to 30 knots. A slight
chance of showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. A slight 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.
.SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots. A slight chance of rain showers. A slight chance of
snow showers in the afternoon. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots veering north by
midnight, then diminishing to 10 to 20 knots late. A slight
chance of rain showers in the evening. A slight chance of snow
showers. Waves subsiding to 2 to 4 feet.
.SUNDAY...North winds 5 to 15 knots becoming northeast 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.MONDAY...Northeast winds 10 to 20 knots backing north in the
afternoon. Rain showers. Snow showers in the afternoon. Waves
building to 1 to 3 feet.
.MONDAY NIGHT...North winds 15 to 25 knots. Rain showers in the
evening. Snow showers. Waves building to 3 to 5 feet occasionally
to 7 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots veering north. Snow
showers likely, then a chance of snow showers. Waves subsiding to
calm to 2 feet.

$$

LSZ267-230445-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
342 PM EST Fri Nov 22 2024

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 15 to 25 knots. A slight chance of
rain showers. Waves 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. A chance of rain showers. A slight
chance of snow showers in the afternoon. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots late. A slight chance of rain showers in the
evening. A slight chance of snow showers. Waves subsiding to 2 to
4 feet.
.SUNDAY...North winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots. A chance of rain
showers. Waves calm to 2 feet.
.MONDAY...East winds 10 to 20 knots backing northeast in the
afternoon. Rain showers. Snow showers in the afternoon. Waves
building to 1 to 3 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots becoming north
15 to 25 knots after midnight. Rain showers in the evening. Snow
showers. Waves building to 2 to 4 feet.
.TUESDAY...Northwest winds 15 to 25 knots. Snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots veering north. Snow
showers likely, then a chance of snow showers. Waves subsiding to
calm to 2 feet.

$$

LSZ261-230445-
MAFOR 2222/
Superior West 13710 13720 12710. Waves 1 to 3 feet.

Superior North Central 11730 13720 11730 13720. Waves 2 to 4 feet
building to 3 to 5 feet tonight. Waves 3 to 5 feet subsiding to 2
to 4 feet Saturday.

Superior South Central 12730 12720 12730 12720. Waves 3 to 6 feet
tonight. Waves 3 to 6 feet subsiding to 2 to 4 feet Saturday.

Superior East 11830 11730 11720 14730 11730. A chance of rain
showers Saturday afternoon. Waves 3 to 6 feet.

$$

RM

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

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