624
FZUS63 KMQT 240241
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
941 PM EST Sat Nov 23 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...Tonight, Lake Superior is between a 28.8 inch low
over Nova Scotia extending a 29.8 inch trough over the eastern
Great Lakes Basin and a broad 30.1 inch ridge over the western
portions of the Upper Midwest. The ridge will weaken to 30.0
inches as it shifts across the Upper Great Lakes throughout the
rest of tonight and early Sunday. A 29.7 inch low developing over
the Southern Plains on Sunday will then lift northeast, crossing
the Great Lakes region on Monday at 29.8 inches. As the low
deepens to 29.6 inches while tracking to southern Quebec on
Tuesday, a 30.3 inch high pressure ridge will build southeast to
the Middle Mississippi River Valley. As the low drifts north over
Quebec during Tuesday night and Wednesday, the ridge will weaken
to 30.1 inches as it approaches the Upper Great Lakes. Thursday,
the low pressure will retrograde to James Bay at 29.7 incheswhile
broad high pressure of at least 30.4 inches resides over the Great
Plains.

LSZ162-241045-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
941 PM EST Sat Nov 23 2024 /841 PM CST Sat Nov 23 2024/

.REST OF TONIGHT...North winds 10 to 20 knots veering northeast
late. Waves calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. Waves building to 2 to 4 feet.
.SUNDAY NIGHT...East winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. A chance of rain showers, possibly mixed
with snow in the evening, then rain showers, possibly mixed with
snow after midnight. Waves subsiding to 1 to 3 feet.
.MONDAY...Northeast winds 10 to 20 knots becoming north 15 to
25 knots in the afternoon. A slight chance of rain showers in the
morning. Snow showers. Rain showers likely in the afternoon.
Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. Snow showers likely in the
evening, then a chance of snow showers after midnight. Waves 2 to
4 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to 1 to 3 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots veering north
after midnight. Waves subsiding to calm to 2 feet.
.WEDNESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots increasing to 10 to
20 knots. A chance of snow showers. Waves building to 1 to
3 feet.

$$

LSZ263-241045-
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 EST Sat Nov 23 2024

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

$$

LSZ264-241045-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
941 PM EST Sat Nov 23 2024

.REST OF TONIGHT...Northwest winds 10 to 20 knots veering north
by midnight, then diminishing to 5 to 15 knots late. Waves 2 to
4 feet subsiding to 1 to 3 feet.
.SUNDAY...Northeast winds 5 to 15 knots veering east. Waves
subsiding to calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots. Snow showers likely,
possibly mixed with rain showers after midnight. Waves calm to
2 feet.
.MONDAY...East winds 5 to 15 knots backing northeast in the
afternoon. Snow showers, possibly mixed with rain. Waves building
to 1 to 3 feet.
.MONDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Snow showers likely. Waves building to
2 to 4 feet.
.TUESDAY...Northwest winds 15 to 25 knots. A chance of snow
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...North winds 5 to 15 knots. Waves subsiding to calm
to 2 feet.
.THURSDAY...Northwest winds 5 to 15 knots. A chance of snow
showers. Waves building to 1 to 3 feet.

$$

LSZ265-241045-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
941 PM EST Sat Nov 23 2024

.REST OF TONIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots by midnight, then veering north late. Isolated
snow showers late in the evening. Waves 2 to 4 feet subsiding to
1 to 3 feet.
.SUNDAY...North winds 5 to 15 knots veering east by late morning,
then increasing to 10 to 20 knots by mid afternoon. Waves
subsiding to calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots. Snow showers likely,
possibly mixed with rain showers after midnight. Waves calm to
2 feet.
.MONDAY...East winds 10 to 20 knots backing northeast in the
afternoon. Rain showers, possibly mixed with snow. Waves building
to 1 to 3 feet.
.MONDAY NIGHT...North winds 15 to 25 knots backing northwest
after midnight. Rain showers in the evening. Snow showers. Waves
building to 2 to 4 feet.
.TUESDAY...Northwest winds 20 to 30 knots. Snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. Snow showers likely in the
evening, then a chance of snow showers after midnight. Waves
subsiding to 1 to 3 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. A chance of snow
showers. Waves subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots backing west. A chance
of snow showers, then snow showers likely. Waves calm to 2 feet.

$$

LSZ266-241045-
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 EST Sat Nov 23 2024

.REST OF TONIGHT...Northwest winds 15 to 25 knots becoming north
10 to 20 knots late. Scattered snow showers. Waves 3 to 6 feet
occasionally to 8 feet subsiding to 2 to 4 feet.
.SUNDAY...North winds 10 to 20 knots becoming northeast 5 to
15 knots by late morning, then veering east by mid afternoon.
Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots. A chance of snow
showers, possibly mixed with rain after midnight. Waves calm to
2 feet.
.MONDAY...East winds 10 to 20 knots backing northeast in the
afternoon. Rain and snow showers. Waves building to 1 to 3 feet.
.MONDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. Rain showers in the evening. Snow
showers. Waves building to 2 to 4 feet.
.TUESDAY...Northwest winds 20 to 30 knots. Snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet.
.TUESDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. Snow showers. Waves subsiding to 2 to
4 feet.
.WEDNESDAY...North winds 10 to 20 knots backing northwest. Snow
showers likely, then a chance of snow showers. Waves subsiding to
calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots. A chance of snow
showers, then snow showers likely. Waves building to 1 to 3 feet.

$$

LSZ267-241045-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
941 PM EST Sat Nov 23 2024

.REST OF TONIGHT...Northwest winds 20 to 30 knots becoming north
15 to 25 knots late. Scattered rain showers late in the evening.
Scattered snow showers. Waves 3 to 6 feet occasionally to 8 feet
subsiding to 2 to 4 feet.
.SUNDAY...North winds 10 to 20 knots diminishing to 5 to 15 knots
by late morning, then veering northeast by mid afternoon. Waves
subsiding to calm to 2 feet.
.SUNDAY NIGHT...East winds 5 to 15 knots becoming southeast 10 to
20 knots by midnight. A chance of rain and snow showers after
midnight. Waves calm to 2 feet.
.MONDAY...East winds 10 to 20 knots. Rain and snow showers. Waves
calm to 2 feet.
.MONDAY NIGHT...North winds 10 to 20 knots increasing to 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 increasing to 20 to
30 knots in the afternoon. Snow showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.TUESDAY NIGHT...Northwest winds 15 to 25 knots veering north
after midnight. Snow showers. Waves subsiding to 2 to 4 feet.
.WEDNESDAY...North winds 10 to 20 knots. Snow showers likely,
then a chance of snow showers. Waves subsiding to calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots. A chance of snow
showers, then snow showers likely. Waves building to 1 to 3 feet.

$$
LSZ261-241045-
MAFOR 2404/
Superior West 11810 11100 11110 11210 14220. Waves 1 to 4 feet.

Superior North Central 11820 12810 11110 11100 11200 12210. Waves
1 to 4 feet.

Superior South Central 12720 12810 11100 11200 12210. Waves 1 to
4 feet.

Superior East 11730 19737 13820 11800 12100 11200. Waves 3 to 6
feet overnight. Waves 1 to 4 feet Sunday. Waves around 1 foot
Sunday evening.

$$

GS

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

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