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FZUS63 KMQT 202101
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EST Fri Feb 20 2026

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 29.4 inch low over Upper Lower Michigan will move to Lake Huron
this evening, progressively weakening to 29.5 inches as it does so.
The low continues to weaken Saturday, devolving into bent back
troughing of 30.2 inches over the Upper Great Lakes by Sunday
morning. Troughing continues to weaken Sunday as a 31.0 inch high
moves across Manitoba. This high weakens to 30.5 inches as it moves
through northern Ontario Monday. Behind the ridge Monday night and
Tuesday, a deepening Clipper low of at least 29.6 inches moves into
the Northern Plains, reaching the U.P. Tuesday evening. Troughing
around 29.7 inches remains over Lake Superior through Wednesday as a
29.5 inch low tracks to the south.


LSZ162-210900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EST Fri Feb 20 2026 /300 PM CST Fri Feb 20 2026/

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. A slight
chance of snow. Waves 3 to 5 feet occasionally to 7 feet.
.TONIGHT...Northwest winds 10 to 20 knots. A slight chance of
snow. Waves subsiding to 1 to 3 feet.
.SATURDAY...Northwest winds 10 to 20 knots. A slight chance of
snow. Waves subsiding to calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots becoming north
15 to 25 knots by midnight, then becoming northwest 20 to
30 knots late. A slight chance of snow. Waves building to 1 to
3 feet.
.SUNDAY...North winds 15 to 25 knots. A slight chance of snow
showers in the morning. Waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet.
.SUNDAY NIGHT...North winds 15 to 25 knots. Waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet.
.MONDAY...North winds 10 to 20 knots becoming east 5 to 15 knots
in the afternoon. Waves subsiding to calm to 2 feet.
.MONDAY NIGHT...Southeast winds 5 to 15 knots increasing to 10 to
20 knots after midnight. A chance of snow showers. Waves building
to 2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots becoming west 10 to
20 knots. Snow showers likely, then a chance of snow showers.
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. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-210900-
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-
400 PM EST Fri Feb 20 2026

.LATE THIS AFTERNOON...North winds 15 to 25 knots. Freezing
spray. Snow. Waves 4 to 8 feet occasionally to 10 feet.
.TONIGHT...North winds 10 to 20 knots backing northwest by
midnight. Freezing spray in the evening. Snow in the evening,
then a chance of snow after midnight. Waves subsiding to 2 to
4 feet.
.SATURDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots. A chance of snow. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots by midnight. A chance of snow. Waves building to 3 to
6 feet occasionally to 8 feet.
.SUNDAY...North winds 15 to 25 knots increasing to gales to
35 knots in the afternoon. A slight chance of snow showers. Waves
building to 4 to 7 feet occasionally to 9 feet.
.SUNDAY NIGHT...North gales to 35 knots diminishing to 20 to
30 knots after midnight. Heavy freezing spray. Waves building to
7 to 10 feet occasionally to 13 feet, then subsiding to 5 to
8 feet occasionally to 10 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to 1 to 3 feet.
.MONDAY NIGHT...East winds 5 to 15 knots becoming southeast 15 to
25 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots veering west. Snow showers
likely, then a chance of snow showers. Freezing spray. Waves
building to 4 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Northwest winds 10 to 20 knots. Waves subsiding to
2 to 4 feet, then building to 3 to 5 feet occasionally to 7 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-210900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
400 PM EST Fri Feb 20 2026

.LATE THIS AFTERNOON...North winds 15 to 25 knots. Freezing
spray. Snow. Waves 5 to 8 feet occasionally to 10 feet.
.TONIGHT...North winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. Freezing spray in the evening. Snow. Waves
subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 5 to 15 knots. Snow. Waves subsiding to
2 to 4 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots by midnight. A chance of snow. Waves building to 3 to
6 feet occasionally to 8 feet.
.SUNDAY...North winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. Heavy freezing spray. A slight chance
of snow showers. Waves building to 6 to 9 feet occasionally to
11 feet.
.SUNDAY NIGHT...North gales to 35 knots. Heavy freezing spray. A
chance of snow showers. Waves building to 6 to 10 feet
occasionally to 13 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 10 to
20 knots in the afternoon. Heavy freezing spray in the morning. A
chance of snow showers in the morning. Waves subsiding to 2 to
4 feet.
.MONDAY NIGHT...Northeast winds 5 to 15 knots becoming southeast
15 to 25 knots after midnight. A chance of snow showers. Waves
subsiding to calm to 2 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.TUESDAY...South winds 15 to 25 knots backing southeast. Freezing
spray. Snow showers likely. A chance of snow showers. Waves
building to 7 to 10 feet occasionally to 13 feet.
.WEDNESDAY...Northwest winds 15 to 25 knots. Freezing spray.
Waves subsiding to 3 to 6 feet occasionally to 8 feet, then
building to 4 to 7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-210900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EST Fri Feb 20 2026

.LATE THIS AFTERNOON...North winds 15 to 25 knots. Snow. Waves
4 to 7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet.
.TONIGHT...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots late. Snow. Waves building to 4 to 7 feet occasionally
to 9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then becoming north 15 to 25 knots by
mid afternoon. Snow. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...Northwest winds 15 to 25 knots increasing to
20 to 30 knots by midnight, then veering north late. Snow likely
in the evening, then a chance of snow showers after midnight.
Waves building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...North gales to 40 knots. Freezing spray. A chance of
snow showers. Waves building to 7 to 10 feet occasionally to
13 feet.
.SUNDAY NIGHT...North gales to 40 knots. Heavy freezing spray. A
chance of snow showers. Waves building to 9 to 12 feet
occasionally to 15 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. Heavy freezing spray. A chance of snow
showers. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...North winds 5 to 15 knots becoming south 10 to
20 knots after midnight. Waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet.
.TUESDAY...South winds 15 to 25 knots. Freezing spray. Snow
showers likely. A chance of snow showers. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet.
.WEDNESDAY...West winds 20 to 30 knots veering northwest.
Freezing spray. A chance of snow showers. Waves building to 4 to
7 feet occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-210900-
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-
400 PM EST Fri Feb 20 2026

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Snow,
possibly mixed with rain. Waves 3 to 6 feet occasionally to
8 feet.
.TONIGHT...Northeast winds 15 to 25 knots. Snow, possibly mixed
with rain in the evening, then a chance of snow after midnight.
Waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet.
.SATURDAY...East winds 15 to 25 knots becoming northeast 10 to
20 knots by late morning, then backing north by mid afternoon. A
chance of snow. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots. A chance of snow.
Waves building to 3 to 6 feet occasionally to 8 feet.
.SUNDAY...North winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. Freezing spray. A chance of snow
showers. Waves building to 7 to 10 feet occasionally to 13 feet.
.SUNDAY NIGHT...North gales to 40 knots. Heavy freezing spray. A
chance of snow showers. Waves building to 9 to 12 feet
occasionally to 15 feet.
.MONDAY...North gales to 35 knots diminishing to 15 to 25 knots
in the afternoon. Heavy freezing spray. A chance of snow showers.
Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.MONDAY NIGHT...North winds 10 to 20 knots becoming southeast
15 to 25 knots after midnight. Waves subsiding to 1 to 3 feet,
then building to 2 to 4 feet.
.TUESDAY...Southeast winds 20 to 30 knots. Heavy freezing spray.
Snow showers likely. A chance of snow showers. Waves building to
7 to 10 feet occasionally to 13 feet.
.WEDNESDAY...Northwest 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 7 to 10 feet
occasionally to 13 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-210900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EST Fri Feb 20 2026

.LATE THIS AFTERNOON...Northeast winds 15 to 25 knots. Rain and
snow likely. Waves 2 to 4 feet.
.TONIGHT...Northeast winds 15 to 25 knots diminishing to 10 to
20 knots by midnight. A chance of rain in the evening. A slight
chance of snow. Waves subsiding to 1 to 3 feet.
.SATURDAY...East winds 10 to 20 knots diminishing to 5 to
15 knots by late morning, then backing northeast by mid
afternoon. A slight chance of snow. Waves subsiding to calm to
2 feet.
.SATURDAY NIGHT...Northeast winds 5 to 15 knots increasing to
10 to 20 knots by midnight. A slight chance of snow. Waves
building to 1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots increasing to 20 to 30 knots
in the afternoon. A slight chance of snow showers. Waves building
to 4 to 7 feet occasionally to 9 feet.
.SUNDAY NIGHT...North gales to 35 knots. Heavy freezing spray.
Waves building to 6 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 20 to 30 knots. Heavy freezing spray in the
morning. Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.MONDAY NIGHT...Northeast winds 10 to 20 knots veering east after
midnight. Waves subsiding to 1 to 3 feet.
.TUESDAY...Southeast winds 15 to 25 knots increasing to 20 to
30 knots. Heavy freezing spray. A chance of snow showers. Waves
building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...Southeast winds 20 to 30 knots veering northwest.
Freezing spray. A chance of snow showers. Waves building to 6 to
9 feet occasionally to 11 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-210300-
MAFOR 2022/
Superior West 11820 11720 12710 11720 13710. A chance of snow
early this evening. Waves 3 to 5 feet subsiding to 2 to 4 feet
tonight. Waves 1 to 3 feet Saturday.

Superior North Central 12837 15827. Waves 5 to 8 feet subsiding
to 3 to 5 feet tonight. Waves 3 to 5 feet Saturday.

Superior South Central 11837 11747 13737 11727 12827. Waves 4 to
7 feet tonight. Waves 3 to 5 feet Saturday.

Superior East 11137 13130 11120 11220 12110. Waves 3 to 5 feet
subsiding to 2 to 4 feet tonight. Waves 2 to 4 feet subsiding to
1 to 3 feet Saturday.

$$

WFO MQT

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weather.gov/mqt/glftable

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weather.gov/greatlakes