221
FZUS63 KMQT 130301
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EST Thu Feb 12 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 30.3 inch high pressure is retreating into the southern portion of
the Great Lakes while a 29.8 inch low moves across far northern
Ontario tonight. This low then pulls a 29.9 inch trough over eastern
Lake Superior on Friday. High pressure then builds back to 30.1
inches over the Great Lakes by Saturday morning before a weak 29.9
inch trough moves into the Upper Great Lakes Saturday evening. Weak
troughing of around 29.8 inches hangs out over the Upper Great Lakes
the rest of this weekend before strengthening to 29.7 inches over
Lake Superior via a 29.6 inch low lifting over northern Ontario on
Monday. Weak ridging of 30.2 inches crosses back over Lake Superior
on Tuesday ahead of a 29.3 inch low lifting off of the Central
Rockies.


LSZ162-130900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EST Thu Feb 12 2026 /900 PM CST Thu Feb 12 2026/

.REST OF TONIGHT...South winds 5 to 15 knots veering southwest by
midnight, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.FRIDAY...West winds 10 to 20 knots diminishing to 5 to 15 knots.
Waves calm to 2 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots becoming northeast less
than 10 knots by midnight, then becoming south 5 to 15 knots
late. Waves calm to 2 feet.
.SATURDAY...South winds less than 10 knots becoming southwest
5 to 15 knots in the afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY...West winds 5 to 15 knots veering northeast. Waves calm
to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots increasing to 20 to
30 knots. A chance of snow showers, possibly mixed with rain.
Waves building to 5 to 8 feet occasionally to 10 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-130900-
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-
1000 PM EST Thu Feb 12 2026

.REST OF TONIGHT...South winds 5 to 15 knots becoming southwest
10 to 20 knots by midnight, then increasing to 15 to 25 knots
late. Waves calm to 2 feet building to 2 to 4 feet.
.FRIDAY...West winds 15 to 25 knots diminishing to 5 to 15 knots.
Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...Northwest winds less than 10 knots backing south
by midnight. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots veering southwest in the
afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots veering west
after midnight. Waves calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing southwest in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots. Waves calm to
2 feet.
.MONDAY...West winds 5 to 15 knots backing east. Waves calm to
2 feet.
.TUESDAY...East winds 10 to 20 knots increasing to 20 to
30 knots. A chance of snow showers, possibly mixed with rain.
Waves building to 7 to 10 feet occasionally to 13 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-130900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1000 PM EST Thu Feb 12 2026

.REST OF TONIGHT...South winds 5 to 15 knots becoming southwest
15 to 25 knots by midnight, then increasing to 20 to 30 knots
late. Waves calm to 2 feet building to 3 to 5 feet occasionally
to 7 feet.
.FRIDAY...West winds 15 to 25 knots veering northwest by late
morning, then diminishing to 5 to 15 knots by mid afternoon.
Waves subsiding to 1 to 3 feet.
.FRIDAY NIGHT...North winds 5 to 15 knots diminishing to less
than 10 knots by midnight, then backing southwest late. Waves
subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...Southwest winds 5 to 15 knots veering northwest
after midnight. Waves calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots backing west in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots backing south after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots veering northwest. Waves calm
to 2 feet.
.TUESDAY...East winds 10 to 20 knots increasing to 20 to
30 knots. A chance of snow showers. Waves building to 7 to
10 feet occasionally to 13 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-130900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EST Thu Feb 12 2026

.REST OF TONIGHT...South winds 5 to 15 knots veering southwest by
midnight, then increasing to 10 to 20 knots late. Waves calm to
2 feet.
.FRIDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
by late morning, then becoming northwest 10 to 20 knots by mid
afternoon. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.
.FRIDAY NIGHT...West winds 5 to 15 knots backing southwest late.
Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots veering west after
midnight. Waves calm to 2 feet.
.SUNDAY...Northwest winds 10 to 20 knots backing west in the
afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots increasing to 20 to
30 knots. A chance of snow showers, possibly mixed with rain.
Waves building to 5 to 8 feet occasionally to 10 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-130900-
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-
1000 PM EST Thu Feb 12 2026

.REST OF TONIGHT...South winds 10 to 20 knots veering southwest
by midnight, then increasing to 15 to 25 knots late. Waves calm
to 2 feet building to 2 to 4 feet.
.FRIDAY...Southwest winds 15 to 25 knots veering northwest. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots by midnight, then backing west late. A slight
chance of snow showers in the evening. Waves subsiding to calm to
2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots veering southwest
after midnight. Waves building to 1 to 3 feet.
.SUNDAY...Northwest winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.SUNDAY NIGHT...Southwest winds 10 to 20 knots backing south
after midnight. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots. Waves building to 1 to
3 feet, then subsiding to calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots increasing to gales to
35 knots. 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.

$$

LSZ267-130900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EST Thu Feb 12 2026

.REST OF TONIGHT...Southwest winds 5 to 15 knots increasing to
10 to 20 knots late. Waves calm to 2 feet building to 2 to
4 feet.
.FRIDAY...Southwest winds 15 to 25 knots veering northwest by mid
afternoon. A chance of snow showers in the morning. Waves
building to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots diminishing to
5 to 15 knots by midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. Waves building to
1 to 3 feet.
.SUNDAY...West winds 10 to 20 knots. Waves subsiding to calm to
2 feet.
.SUNDAY NIGHT...Southwest winds 5 to 15 knots becoming south
10 to 20 knots after midnight. Waves calm to 2 feet.
.MONDAY...South winds 10 to 20 knots veering west. Waves building
to 1 to 3 feet, then subsiding to calm to 2 feet.
.TUESDAY...East winds 10 to 20 knots increasing to 20 to
30 knots. A chance of snow showers, possibly mixed with freezing
rain. Waves building to 3 to 6 feet occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-130900-
MAFOR 1304/
Superior West 11510 11520 11530 11630 11620 11610 11600 11800.
Waves omitted due to the lake being mostly ice covered.

Superior North Central 11520 11540 11640 11630 11730 11720 11710
11810. Waves 1 to 2 feet building to 2 to 4 feet overnight. Waves
3 to 5 feet subsiding to 2 to 4 feet Friday. Waves 1 to 3 feet
Friday evening.

Superior South Central 11410 11510 11520 11620 12730 11720 11710.
Waves 2 feet or less overnight. Waves 2 feet or less building to
2 to 4 feet Friday. Waves 2 to 4 feet subsiding to 1 to 3 feet
Friday evening. Wave heights are for ice free areas.

Superior East 12520 12530 11630 12730 11720. A chance of snow
showers Friday morning. Waves 1 to 3 feet building to 2 to 4 feet
overnight. Waves 3 to 6 feet Friday and Friday evening.

$$

WFO MQT

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

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