176
FZUS63 KMQT 230156
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
956 PM EDT Sat Mar 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 30.1 inch high pressure over the Upper Great Lakes
moves out of Lake Superior tonight as a 29.4 inch low pressure
organizes over the Northern Plains and pushes into the Upper Great
Lakes Sunday night before leaving for the St. Lawrence Seaway
late Monday. Ridging of at least 30.0 inches returns over Lake
Superior Tuesday, building to 30.2 inches Wednesday. A 29.8 inch
low in western Ontario Wednesday night heads to southwestern
Quebec Thursday evening while deepening to 29.7 inches as a 30.3
inch high pressure moves into northern Manitoba.

LSZ162-231000-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
956 PM EDT Sat Mar 22 2025 /856 PM CDT Sat Mar 22 2025/

.REST OF TONIGHT...East winds 10 to 20 knots increasing to 15 to
25 knots late. Snow, possibly mixed with freezing rain after
midnight. Waves 1 to 3 feet building to 3 to 5 feet occasionally
to 7 feet.
.SUNDAY...East winds 15 to 25 knots. Snow, possibly mixed with
rain. Waves building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY NIGHT...East winds 20 to 30 knots backing north after
midnight. Snow through midnight, then a chance of snow after
midnight. Waves building to 4 to 7 feet occasionally to 9 feet.
.MONDAY...North winds 15 to 25 knots becoming northwest 10 to
20 knots by mid afternoon. A slight chance of snow showers
through early afternoon. Waves subsiding to 1 to 3 feet.
.MONDAY NIGHT...Northwest winds 5 to 15 knots veering north after
midnight. Waves subsiding to calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots veering south by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.THURSDAY...Northwest winds 10 to 20 knots veering east. Waves
building to 1 to 3 feet.

$$

LSZ263-231000-
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-
956 PM EDT Sat Mar 22 2025

.REST OF TONIGHT...East winds 10 to 20 knots veering southeast
after midnight, then increasing to 15 to 25 knots late. A chance
of snow after midnight. Waves 1 to 3 feet building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY...Southeast winds 20 to 30 knots increasing to 30 knots
with a few gale force gusts to 35 knots possible in the
afternoon, then backing east late. A slight chance of freezing
rain through early afternoon. Snow, possibly mixed with rain.
Waves building to 9 to 12 feet occasionally to 15 feet.
.SUNDAY NIGHT...East winds 20 to 30 knots backing north late.
Snow. Waves subsiding to 6 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.MONDAY NIGHT...North winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots. Waves calm to 2 feet.
.TUESDAY NIGHT...Southwest winds 5 to 15 knots veering west after
midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves building to 2 to
4 feet, then subsiding to 1 to 3 feet.
.THURSDAY...Northwest winds 10 to 20 knots veering east. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.

$$

LSZ264-231000-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
956 PM EDT Sat Mar 22 2025

...GALE WARNING IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.REST OF TONIGHT...South winds 5 to 15 knots becoming southeast
10 to 20 knots after midnight, then increasing to 15 to 25 knots
late. Waves calm to 2 feet building to 3 to 6 feet occasionally
to 8 feet.
.SUNDAY...Southeast winds to 30 knots increasing to gales to 40
knots. Snow. Waves building to 10 to 14 feet occasionally to 18
feet.
.SUNDAY NIGHT...Southeast gales to 35 knots becoming east 20 to
30 knots after midnight, then becoming northeast 15 to 25 knots
late. Snow. Waves subsiding to 6 to 9 feet occasionally to
11 feet.
.MONDAY...North winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. Snow showers likely through early
afternoon, then a chance of snow showers by mid afternoon. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...North winds 5 to 15 knots. Waves subsiding to
calm to 2 feet.
.TUESDAY...North winds 5 to 15 knots backing northwest by mid
afternoon. Waves calm to 2 feet.
.TUESDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.THURSDAY...Northwest winds 10 to 20 knots becoming east 5 to
15 knots. Waves subsiding to calm to 2 feet, then building to
2 to 4 feet.

$$

LSZ265-231000-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
956 PM EDT Sat Mar 22 2025

...GALE WARNING IN EFFECT FROM SUNDAY MORNING THROUGH SUNDAY
EVENING...

.REST OF TONIGHT...Southeast winds 10 to 20 knots becoming south
15 to 25 knots after midnight. Waves calm to 2 feet building to
3 to 6 feet occasionally to 8 feet.
.SUNDAY...Southeast gales to 40 knots. A chance of snow. Waves
building to 8 to 11 feet occasionally to 14 feet.
.SUNDAY NIGHT...Southeast gales to 35 knots becoming east 20 to
30 knots after midnight, then becoming northeast 15 to 25 knots
late. Snow. Waves subsiding to 3 to 6 feet occasionally to
8 feet.
.MONDAY...North winds 15 to 25 knots backing northwest by mid
afternoon. Snow showers likely through early afternoon, then a
chance of snow showers 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.
.MONDAY NIGHT...North winds 10 to 20 knots. A chance of snow
showers through midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...North winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Northwest winds 5 to 15 knots becoming west
10 to 20 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves building to 1 to
3 feet.
.THURSDAY...Northwest winds 10 to 20 knots veering east. Waves
subsiding to calm to 2 feet.

$$

LSZ266-231000-
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-
956 PM EDT Sat Mar 22 2025

...GALE WARNING IN EFFECT FROM SUNDAY MORNING THROUGH LATE SUNDAY
NIGHT...

.REST OF TONIGHT...South winds 5 to 15 knots increasing to 15 to
25 knots. Waves 1 to 3 feet subsiding to calm to 2 feet, then
building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...Southeast gales to 40 knots. A chance of snow. Waves
building to 10 to 14 feet occasionally to 18 feet.
.SUNDAY NIGHT...Southeast gales to 40 knots becoming east gales
to 35 knots after midnight, then becoming northeast 20 to
30 knots late. Snow. Waves subsiding to 4 to 7 feet occasionally
to 9 feet.
.MONDAY...North winds 15 to 25 knots. Snow showers likely through
early afternoon, then a chance of snow showers by mid afternoon.
Waves subsiding to 3 to 6 feet occasionally to 8 feet, then
building to 4 to 7 feet occasionally to 9 feet.
.MONDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.TUESDAY...North winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.TUESDAY NIGHT...Northwest winds 10 to 20 knots backing west
after midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.THURSDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. Waves subsiding to 1 to 3 feet.

$$

LSZ267-231000-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
956 PM EDT Sat Mar 22 2025

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

.REST OF TONIGHT...West winds 5 to 15 knots backing south after
midnight, then increasing to 10 to 20 knots late. Waves 1 to
3 feet subsiding to calm to 2 feet, then building to 2 to 4 feet.
.SUNDAY...Southeast winds 20 to 30 knots increasing to gales to
40 knots in the afternoon. Freezing spray through early
afternoon. A chance of snow. Waves building to 8 to 11 feet
occasionally to 14 feet.
.SUNDAY NIGHT...Southeast gales to 40 knots becoming east gales
to 35 knots after midnight, then diminishing to 20 to 30 knots
late. Snow. Waves subsiding to 3 to 5 feet occasionally to
7 feet.
.MONDAY...North winds 15 to 25 knots. Snow showers likely through
early afternoon, then a chance of snow showers by mid afternoon.
Waves subsiding to 2 to 4 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.MONDAY NIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. A chance of snow showers. Waves building
to 3 to 6 feet occasionally to 8 feet, then subsiding to 1 to
3 feet.
.TUESDAY...North winds 10 to 20 knots backing northwest by mid
afternoon. Waves subsiding to calm to 2 feet.
.TUESDAY NIGHT...North winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. Waves calm to 2 feet.
.WEDNESDAY...West winds 10 to 20 knots. Waves building to 3 to
5 feet occasionally to 7 feet.
.THURSDAY...Northwest winds 15 to 25 knots becoming north 10 to
20 knots. Waves subsiding to 1 to 3 feet.

$$
LSZ261-231000-
MAFOR 2303/
Superior West 12220 11337 12347 13237. Waves 1 to 4 feet overnight.
Waves 3 to 6 feet Sunday and Sunday evening.

Superior North Central...GALE WARNING IN EFFECT...11320 11330
11340 11350 14357. Waves 2 feet or less building to 2 to 4 feet
overnight. Waves 3 to 6 feet building to 9 to 13 feet Sunday.
Waves 10 to 14 feet Sunday evening.

Superior South Central...GALE WARNING IN EFFECT...11320 11430
11440 11340 13350 11357. Waves 1 to 3 feet building to 3 to 5
feet overnight. Waves 3 to 6 feet building to 7 to 10 feet Sunday
and Sunday evening.

Superior East...GALE WARNING IN EFFECT...11500 11410 11430 11340
11341 12350 11357. Waves 1 to 4 feet overnight building to 7 to
10 feet Sunday. Waves 9 to 12 feet 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