572
FZUS63 KMQT 212056
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
356 PM EST Thu Nov 21 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...A 29.6 inch low pressure over southern Lake Michigan
is in the process of phasing with a 29.3 inch low off the coast of
the US Northeast while a 30.3 inch high pressure is over the
Dakotas. By Friday morning, the lows will have merged into a 29.2
inch low over Long Island while the 30.3 inch high pressure
expands over much of the Northern Plains. The low pressure will
slowly shift to Nova Scotia by Saturday morning maintaining 29.2
inches while high pressure to the west weakens to 30.1 inches.
Throughout Sunday, a 29.6 inch Colorado Low forms, weakening to
29.8 inches as it arrives over the Upper Great Lakes by Monday
morning. By Tuesday morning, the low will be south of James Bay at
29.7 inches while a 30.4 inch high pressure spreads over the
Northern Plains.

LSZ162-220500-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
356 PM EST Thu Nov 21 2024 /256 PM CST Thu Nov 21 2024/

...GALE WARNING IN EFFECT UNTIL 7 PM EST /6 PM CST/ THIS
EVENING...

.LATE THIS AFTERNOON...North gales to 45 knots diminishing to 35
knots late. Waves 4 to 8 feet occasionally to 10 feet.
.TONIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. Waves subsiding to 2 to 4 feet.
.FRIDAY...North winds 15 to 25 knots backing northwest by late
morning, then diminishing to 10 to 20 knots by mid afternoon.
Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...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 becoming east 5 to
15 knots after midnight. Waves calm to 2 feet.
.SUNDAY...East winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. A chance of rain and snow showers in the
afternoon. Waves building to 1 to 3 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots. Rain showers likely.
Waves subsiding to calm to 2 feet, then building to 1 to 3 feet.
.MONDAY...Northwest winds 15 to 25 knots. Rain showers, possibly
mixed with snow, then a chance of snow showers. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.TUESDAY...Northwest winds 10 to 20 knots diminishing to 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ263-220500-
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-
356 PM EST Thu Nov 21 2024

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Isolated
showers. Waves 5 to 9 feet occasionally to 11 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. A slight chance of rain showers in the
evening. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots increasing to 10 to
20 knots by midnight. Waves 1 to 3 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
after midnight. Waves calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...East winds 10 to 20 knots becoming southeast 5 to
15 knots after midnight. Rain showers likely. Waves building to
1 to 3 feet.
.MONDAY...Northwest winds 15 to 25 knots. Rain showers, possibly
mixed with snow, then a chance of snow showers. Waves building to
3 to 6 feet occasionally to 8 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.

$$

LSZ264-220500-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
356 PM EST Thu Nov 21 2024

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Waves 5 to
9 feet occasionally to 11 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. A slight chance of rain showers after
midnight. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.FRIDAY...North winds 10 to 20 knots. A slight chance of rain
showers in the morning. Waves subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots. Waves 2 to
4 feet.
.SATURDAY...Northwest winds 10 to 20 knots. Waves 2 to 4 feet.
.SATURDAY NIGHT...North winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots veering southeast in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 5 to 15 knots. Rain showers
likely. Waves building to 2 to 4 feet.
.MONDAY...North winds 15 to 25 knots backing northwest. Rain
showers, possibly mixed with snow. Waves building to 3 to 6 feet
occasionally to 8 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 5 to
15 knots. A chance of snow showers. Waves subsiding to 1 to
3 feet.

$$

LSZ265-220500-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
356 PM EST Thu Nov 21 2024

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Scattered
showers. Waves 6 to 9 feet occasionally to 11 feet.
.TONIGHT...North winds 20 to 30 knots. A chance of showers. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...North winds 20 to 30 knots. A slight chance of rain
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots. A slight chance
of rain showers. Waves subsiding to 2 to 4 feet, then building to
3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 15 to 25 knots. A slight chance of
rain and snow showers. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves subsiding to calm to 2 feet.
.SUNDAY...East winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots. Rain showers
likely. Waves calm to 2 feet.
.MONDAY...Northwest winds 15 to 25 knots increasing to 20 to
30 knots. Rain showers. Snow showers. Waves building to 3 to
5 feet occasionally to 7 feet.
.TUESDAY...Northwest winds 20 to 30 knots diminishing to 10 to
20 knots. Snow showers likely, then a chance of snow showers.
Waves subsiding to calm to 2 feet.

$$

LSZ266-220500-
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-
356 PM EST Thu Nov 21 2024

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Scattered
showers. Waves 6 to 9 feet occasionally to 11 feet.
.TONIGHT...North winds 20 to 30 knots. A chance of showers. Waves
subsiding to 4 to 7 feet occasionally to 9 feet.
.FRIDAY...North winds 20 to 30 knots. A slight chance of rain
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots becoming northwest
20 to 30 knots by midnight. A chance of rain showers. Waves
subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Northwest winds 15 to 25 knots. A chance of rain and
snow showers. Waves 3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming north
5 to 15 knots after midnight. Waves subsiding to 1 to 3 feet.
.SUNDAY...North winds 5 to 15 knots becoming southeast 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots. Rain showers
likely. Waves building to 1 to 3 feet.
.MONDAY...Southeast winds 10 to 20 knots becoming northwest 20 to
30 knots. Rain showers. Snow showers. Waves building to 3 to
6 feet occasionally to 8 feet.
.TUESDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots. Snow showers likely. Waves building to 4 to 7 feet
occasionally to 9 feet, then subsiding to 2 to 4 feet.

$$

LSZ267-220500-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
356 PM EST Thu Nov 21 2024

.LATE THIS AFTERNOON...North winds 15 to 25 knots. Isolated
showers. Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...North winds 15 to 25 knots. A slight chance of
showers. Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...North winds 15 to 25 knots. A slight chance of rain
showers in the afternoon. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots backing northwest by
midnight. A chance of rain showers. Waves building to 3 to 6 feet
occasionally to 8 feet.
.SATURDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A chance of rain showers. A chance of
snow showers in the afternoon. Waves 3 to 6 feet occasionally to
8 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. A chance of snow showers in the
evening. Waves subsiding to 1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots veering southeast in the
afternoon. Waves subsiding to calm to 2 feet.
.SUNDAY NIGHT...Southeast winds 10 to 20 knots. Rain showers
likely. Waves calm to 2 feet.
.MONDAY...Southeast winds 15 to 25 knots veering northwest. Rain
showers. Snow showers. Waves building to 3 to 6 feet occasionally
to 8 feet.
.TUESDAY...Northwest winds 15 to 25 knots. Snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet, then subsiding to
2 to 4 feet.

$$

LSZ261-220500-
MAFOR 2122/
Superior West...GALE WARNING IN EFFECT...11850 11830 14820 12720.
Waves 5 to 7 feet subsiding to 2 to 4 feet tonight. Waves 1 to 3
feet Friday.

Superior North Central 11840 15830 11830. Waves 5 to 9 feet
subsiding to 3 to 5 feet tonight. Waves 3 to 5 feet Friday.

Superior South Central 11840 19846 15830 11830. Waves 5 to 9 feet
tonight. Waves 4 to 7 feet subsiding to 3 to 6 feet Friday.

Superior East 11130 19136 12830 11820 14830. Waves 3 to 6 feet.

$$

GS

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

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