977
FZUS63 KMQT 222059
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
359 PM EST Wed Jan 22 2025

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 29.9 inch low pressure over central Lake Superior
and Upper Michigan this afternoon will continue east over the lake
tonight. The low will then transition to a 30.0 inch trough by
the time it reaches the Lower Great Lakes by late Thursday. In its
wake, a 30.6 inch high pressure ridge moving out over the Plains
on Thursday will weaken to 30.4 inches as it shifts to the
Mississippi River Valley Thursday night and then to the southeast
U.S. on Saturday. Meanwhile, a 29.2 inch low pressure tracking
east to Hudson Bay will swing a 29.8 inch trough across the
Dakotas on Friday and to Lake Superior on Saturday. On Sunday, a
30.5 inch high will drift over the Central Plains, then a deep
29.0 inch low over northern Manitoba tracks southeast over far
northern Ontario through Monday.

LSZ162-230500-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
359 PM EST Wed Jan 22 2025 /259 PM CST Wed Jan 22 2025/

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Isolated
snow showers. Waves 2 to 4 feet.
.TONIGHT...North winds 20 to 30 knots diminishing to 15 to
25 knots late. Scattered snow showers. Waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet.
.THURSDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then increasing to 15 to 25 knots by
mid afternoon. A slight chance of snow showers in the morning.
Waves subsiding to 1 to 3 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots backing west by
midnight. Waves subsiding to calm to 2 feet, then building to
1 to 3 feet.
.FRIDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A slight chance of snow showers in the
afternoon. Waves building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southwest winds 20 to 30 knots becoming west
15 to 25 knots after midnight. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...West winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.SATURDAY NIGHT...West winds 20 to 30 knots. Waves building to
4 to 7 feet occasionally to 9 feet, then subsiding to 2 to
4 feet.
.SUNDAY...West winds 20 to 30 knots. Freezing spray. Waves
building to 6 to 9 feet occasionally to 11 feet.
.MONDAY...West winds 20 to 30 knots diminishing to 15 to
25 knots. Waves subsiding to 2 to 4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-230500-
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-
359 PM EST Wed Jan 22 2025

.LATE THIS AFTERNOON...North winds 15 to 25 knots. Freezing
spray. Scattered snow showers. Waves 3 to 6 feet occasionally to
8 feet.
.TONIGHT...North winds to 30 knots with a few gale force gusts to
35 knots possible diminishing to 15 to 25 knots. Freezing spray.
Scattered snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.THURSDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots. A slight chance of snow showers. Waves subsiding to
2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots backing west by
midnight. A slight chance of snow showers in the evening. Waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet.
.FRIDAY...Southwest winds 20 to 30 knots. Freezing spray. Waves
building to 4 to 7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 20 to 30 knots veering west after
midnight. A chance of snow showers. Waves 4 to 7 feet
occasionally to 9 feet.
.SATURDAY...West winds 20 to 30 knots. A chance of snow showers.
Waves building to 5 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots backing west
after midnight. Freezing spray. 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 35 knots. Freezing spray. Waves building
to 9 to 12 feet occasionally to 15 feet.
.MONDAY...West gales to 35 knots becoming northwest 20 to
30 knots. Waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-230500-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
359 PM EST Wed Jan 22 2025

...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 7 PM EST THIS
EVENING THROUGH THURSDAY MORNING...

.LATE THIS AFTERNOON...North winds 20 to 30 knots. Freezing
spray. Snow showers. Waves 3 to 6 feet occasionally to 8 feet.
.TONIGHT...North winds to 30 knots with a few gale force gusts to
35 knots possible diminishing to 20 to 30 knots late. Heavy
freezing spray. Numerous snow showers in the evening. Scattered
snow showers after midnight. Waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 5 to 8 feet
occasionally to 10 feet.
.THURSDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots. Freezing spray in the morning. A slight chance of snow
showers. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...Northwest winds 10 to 20 knots becoming west
5 to 15 knots by midnight, then increasing to 10 to 20 knots
late. A slight chance of snow showers. Waves subsiding to calm to
2 feet, then building to 1 to 3 feet.
.FRIDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. Freezing spray. Waves building to 4 to
7 feet occasionally to 9 feet.
.FRIDAY NIGHT...Southwest winds 20 to 30 knots veering west after
midnight. Freezing spray in the evening. A chance of snow
showers. Waves building to 5 to 8 feet occasionally to 10 feet.
.SATURDAY...West winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers. Waves
subsiding to 4 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...Northwest winds 20 to 30 knots. Freezing spray.
Waves subsiding to 4 to 7 feet occasionally to 9 feet.
.SUNDAY...West gales to 35 knots. Freezing spray. Waves subsiding
to 3 to 6 feet occasionally to 8 feet, then building to 10 to
14 feet occasionally to 18 feet.
.MONDAY...West gales to 35 knots becoming northwest 20 to
30 knots. Waves subsiding to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-230500-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
359 PM EST Wed Jan 22 2025

...HEAVY FREEZING SPRAY WARNING IN EFFECT FROM 7 PM EST THIS
EVENING THROUGH THURSDAY MORNING...

.LATE THIS AFTERNOON...West winds 15 to 25 knots. Numerous snow
showers. Waves 1 to 3 feet.
.TONIGHT...Northwest winds 20 to 30 knots becoming north to
30 knots with a few gale force gusts to 35 knots possible by
midnight. Heavy freezing spray. Numerous snow showers. Waves
building to 7 to 10 feet occasionally to 13 feet.
.THURSDAY...North winds 20 to 30 knots backing northwest by late
morning, then diminishing to 15 to 25 knots by mid afternoon.
Freezing spray. A chance of snow showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming west
10 to 20 knots by midnight, then increasing to 15 to 25 knots
late. A slight chance of snow showers in the evening. Waves
subsiding to 1 to 3 feet.
.FRIDAY...Southwest winds 10 to 20 knots. Waves 1 to 3 feet.
.FRIDAY NIGHT...Southwest winds 20 to 30 knots. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.SATURDAY...West winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers. Waves
building to 3 to 5 feet occasionally to 7 feet.
.SATURDAY NIGHT...West winds 20 to 30 knots veering northwest
after midnight. Freezing spray. A chance of snow showers. Waves
building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...West winds 20 to 30 knots. Freezing spray. A chance of
snow showers. Waves subsiding to 2 to 4 feet, then building to
5 to 8 feet occasionally to 10 feet.
.MONDAY...West gales to 35 knots becoming northwest 20 to
30 knots. A chance of snow showers. Waves subsiding to 2 to
4 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-230500-
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-
359 PM EST Wed Jan 22 2025

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. Numerous
snow showers. Waves 3 to 5 feet occasionally to 7 feet subsiding
to 2 to 4 feet.
.TONIGHT...West winds 20 to 30 knots becoming north to 30 knots
with a few gale force gusts to 35 knots possible by midnight.
Freezing spray. Numerous snow showers. Waves building to 7 to
10 feet occasionally to 13 feet.
.THURSDAY...North winds 20 to 30 knots becoming northwest 15 to
25 knots by mid afternoon. Freezing spray. A chance of snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots by midnight, then backing west late. Freezing
spray in the evening. A slight chance of snow showers. Waves
subsiding to 2 to 4 feet.
.FRIDAY...Southwest winds 15 to 25 knots. Waves building to 3 to
6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Southwest winds 20 to 30 knots. Freezing spray. A
chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY...West winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. A chance of snow showers. Waves
subsiding to 4 to 8 feet occasionally to 10 feet.
.SATURDAY NIGHT...West winds 20 to 30 knots becoming northwest
gales to 35 knots after midnight. Freezing spray. A chance of
snow showers. Waves building to 7 to 10 feet occasionally to
13 feet.
.SUNDAY...West winds 20 to 30 knots. Freezing spray. A chance of
snow showers. Waves subsiding to 5 to 8 feet occasionally to
10 feet, then building to 10 to 14 feet occasionally to 18 feet.
.MONDAY...West gales to 35 knots becoming northwest 20 to
30 knots. Freezing spray. A chance of snow showers. Waves
building to 11 to 15 feet occasionally to 19 feet, then subsiding
to 6 to 9 feet occasionally to 11 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-230500-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
359 PM EST Wed Jan 22 2025

.LATE THIS AFTERNOON...Southwest winds 15 to 25 knots. Snow
showers. Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...Southwest winds 15 to 25 knots veering west by
midnight, then veering north late. Numerous snow showers in the
evening, then scattered snow showers after midnight. Freezing
spray after midnight. Waves subsiding to 1 to 3 feet, then
building to 4 to 7 feet occasionally to 9 feet.
.THURSDAY...North winds 15 to 25 knots backing northwest by mid
afternoon. Freezing spray. A chance of snow showers. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots diminishing to
10 to 20 knots by midnight. A chance of snow showers. Waves
subsiding to 1 to 3 feet.
.FRIDAY...Southwest winds 15 to 25 knots backing south in the
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet.
.FRIDAY NIGHT...Southwest winds 20 to 30 knots. Freezing spray. A
chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.SATURDAY...Southwest winds 20 to 30 knots veering west in the
afternoon. A chance of snow showers in the morning, then snow
showers likely in the afternoon. Waves subsiding to 4 to 8 feet
occasionally to 10 feet.
.SATURDAY NIGHT...West gales to 35 knots veering northwest after
midnight. Snow showers likely in the evening, then a chance of
snow showers after midnight. Freezing spray after midnight. Waves
building to 7 to 10 feet occasionally to 13 feet.
.SUNDAY...West gales to 35 knots. Freezing spray. A chance of
snow showers. Waves subsiding to 5 to 8 feet occasionally to
10 feet, then building to 9 to 12 feet occasionally to 15 feet.
.MONDAY...West gales to 35 knots becoming northwest 20 to
30 knots. Snow showers likely, then a chance of snow showers.
Waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-230500-
MAFOR 2222/
Superior West 13840 12830 13720. Waves 3 to 6 feet tonight. Waves
3 to 5 feet subsiding to 2 to 4 feet Thursday.

Superior North Central...HEAVY FREEZING SPRAY WARNING IN EFFECT...
11847 12857 11847 11840 19847 11830 12720. Waves 3 to 6 feet
building to 6 to 10 feet tonight. Waves 5 to 8 feet subsiding to
2 to 4 feet Thursday.

Superior South Central...HEAVY FREEZING SPRAY WARNING IN EFFECT...
11637 11747 13857 11830 12730. Waves 1 to 3 feet building to 7 to
10 feet tonight. Waves 5 to 9 feet subsiding to 3 to 6 feet
Thursday.

Superior East 11527 11627 11747 11840 19847 11840 12830 11730.
Waves 3 to 5 feet subsiding to 2 to 4 feet, then building to 4 to
7 feet tonight. Waves 4 to 7 feet subsiding to 3 to 6 feet
Thursday.

$$

Jablonski

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

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