991
FZUS63 KMQT 132101
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
400 PM EST Fri Feb 13 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 29.9 inch trough draped over eastern Lake Superior this afternoon
will slide eastward into Ontario tonight. 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. This will be followed by weak 30.0 inch riding Sunday ahead
of a deeper 29.8 inch trough moving over the lake Monday. Ridging
builds to 30.2 inches over the lake Tuesday, giving way to height
falls into the middle of the week as a 29.3 inch low lifts off of the
Central Rockies.


LSZ162-140900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
400 PM EST Fri Feb 13 2026 /300 PM CST Fri Feb 13 2026/

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...West winds 5 to 15 knots veering northeast by
midnight, then veering southeast late. Patchy fog after midnight.
Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots veering southwest. Patchy
fog. 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 increasing to 10 to 20 knots
in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots becoming north 10 to
20 knots after midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds 15 to 25 knots becoming east gales to
40 knots. A chance of snow showers. Waves calm to 2 feet.
.WEDNESDAY...Northeast gales to 40 knots becoming east 20 to
30 knots. A chance of snow showers. Waves calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-140900-
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 13 2026

.LATE THIS AFTERNOON...West winds 5 to 15 knots. Waves calm to
2 feet.
.TONIGHT...Northwest winds less than 10 knots backing south by
midnight. Patchy dense fog. Waves calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots veering southwest. Patchy
fog. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds less than 10 knots. Waves calm to
2 feet.
.SUNDAY...West winds less than 10 knots becoming southwest 5 to
15 knots in the afternoon. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves calm to 2 feet.
.TUESDAY...Northeast winds 10 to 20 knots becoming east gales to
40 knots. Waves building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...East gales to 35 knots. A chance of snow showers.
Waves building to 5 to 9 feet occasionally to 11 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ264-140900-
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 13 2026

.LATE THIS AFTERNOON...Northwest winds 5 to 15 knots. Waves 1 to
3 feet.
.TONIGHT...Northwest winds 5 to 15 knots veering north by
midnight, then becoming southwest less than 10 knots late. Waves
subsiding to calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 5 to 15 knots veering northwest by
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...South winds 5 to 15 knots veering southwest after
midnight. Waves calm to 2 feet.
.MONDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 5 to 15 knots veering northwest after
midnight. Waves building to 1 to 3 feet.
.TUESDAY...Northeast winds 10 to 20 knots becoming east gales to
40 knots. Waves building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...East gales to 40 knots diminishing to 20 to
30 knots. A chance of snow showers. Waves building to 5 to 9 feet
occasionally to 11 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ265-140900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
400 PM EST Fri Feb 13 2026

.LATE THIS AFTERNOON...Northwest winds 10 to 20 knots. Waves calm
to 2 feet.
.TONIGHT...Northwest 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. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots veering west by
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 10 to 20 knots veering southwest
after midnight. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. Waves calm to 2 feet.
.MONDAY NIGHT...West winds 10 to 20 knots veering northwest after
midnight. Waves calm to 2 feet.
.TUESDAY...North winds 15 to 25 knots becoming east gales to
40 knots. A chance of snow showers. Waves building to 5 to 8 feet
occasionally to 10 feet.
.WEDNESDAY...East gales to 40 knots diminishing to 20 to
30 knots. A chance of snow showers. Waves building to 6 to 9 feet
occasionally to 11 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-140900-
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 13 2026

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming north 5 to
15 knots by midnight, then backing west late. Waves subsiding to
calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. Waves building to 1 to 3 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots veering west late.
Waves subsiding to calm to 2 feet.
.SUNDAY...Northwest winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots increasing to 15 to
25 knots after midnight. Waves building to 1 to 3 feet.
.MONDAY...Southwest winds 15 to 25 knots veering west in the
afternoon. Waves building to 2 to 4 feet.
.MONDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to 1 to 3 feet, then building to 2 to 4 feet.
.TUESDAY...North winds 10 to 20 knots becoming east gales to
40 knots. Waves building to 5 to 8 feet occasionally to 10 feet.
.WEDNESDAY...East gales to 40 knots. A chance of snow showers.
Waves building to 5 to 9 feet occasionally to 11 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-140900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
400 PM EST Fri Feb 13 2026

.LATE THIS AFTERNOON...Northwest winds 15 to 25 knots. Waves 3 to
6 feet occasionally to 8 feet.
.TONIGHT...Northwest winds 10 to 20 knots becoming north 5 to
15 knots by midnight, then backing west late. Waves subsiding to
calm to 2 feet.
.SATURDAY...South winds 5 to 15 knots increasing to 10 to
20 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...South winds 10 to 20 knots. Waves building to
1 to 3 feet, then subsiding to calm to 2 feet.
.SUNDAY...West winds 5 to 15 knots. Waves calm to 2 feet.
.SUNDAY NIGHT...South winds 5 to 15 knots increasing to 10 to
20 knots after midnight. Waves building to 1 to 3 feet.
.MONDAY...Southwest winds 15 to 25 knots veering west in the
afternoon. Waves building to 2 to 4 feet.
.MONDAY NIGHT...West winds 10 to 20 knots veering northwest after
midnight. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.TUESDAY...North winds 10 to 20 knots becoming east gales to
35 knots. Waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet.
.WEDNESDAY...East gales to 35 knots diminishing to 20 to
30 knots. A chance of snow showers. Waves building to 3 to 6 feet
occasionally to 8 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-140300-
MAFOR 1322/
Superior West 11600 11800 12300 12400 12500. Waves omitted due to
the lake being mostly ice covered.

Superior North Central 11720 11810 11800 11600 11500 11400 12410.
Waves 1 to 3 feet subsiding to 1 foot or less tonight. Waves 1
foot or less Saturday. Wave heights are for ice free areas.

Superior South Central 11720 12710 11600 11500 11410 11420 11410.
Waves 2 to 4 feet subsiding to 1 to 3 feet tonight. Waves 2 feet
or less Saturday. Wave heights are for ice free areas.

Superior East 11730 11720 11810 11700 11600 11400 12410. Waves 3
to 6 feet subsiding to 2 to 4 feet tonight. Waves 1 to 2 feet
Saturday.

$$

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