166
FZUS63 KMQT 200301
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1000 PM EST Thu Feb 19 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 29.2 inch low will lift northeast into the Great Lakes by Friday
morning. As it moves through northern Lower Michigan and Lake Huron
through the day, it will weaken to 29.5 inches. The low will
continue to weaken Saturday, devolving into bent back toughing of
30.2 inches by Sunday morning. Troughing continues to weaken Sunday
as a 31.0 inch high moves across Manitoba. This high will weaken to
30.5 inches as it moves through northern Ontario Monday. Behind the
ridge Monday night and Tuesday, a deepening clipper of at least 29.8
inches moves into the Northern Plains, reaching Lake Superior by
Tuesday night.


LSZ162-200900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1000 PM EST Thu Feb 19 2026 /900 PM CST Thu Feb 19 2026/

.REST OF TONIGHT...North winds 5 to 15 knots increasing to 10 to
20 knots late. A slight chance of snow. Waves 2 to 4 feet
subsiding to calm to 2 feet.
.FRIDAY...North winds 10 to 20 knots increasing to 15 to 25 knots
by late morning, then diminishing to 10 to 20 knots by mid
afternoon. A chance of snow. Waves building to 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots. A chance of snow.
Waves subsiding to calm to 2 feet.
.SATURDAY...North winds 10 to 20 knots. A chance of snow showers.
Waves calm to 2 feet.
.SATURDAY NIGHT...Northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. A slight chance of snow showers.
Waves calm to 2 feet.
.SUNDAY...North winds 15 to 25 knots. Waves building to 1 to
3 feet.
.SUNDAY NIGHT...North winds 15 to 25 knots. Waves building to
2 to 4 feet.
.MONDAY...North winds 10 to 20 knots veering southeast. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.
.TUESDAY...South winds 10 to 20 knots veering west. A chance of
snow showers. Waves subsiding to calm to 2 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ263-200900-
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 19 2026

.REST OF TONIGHT...North winds 10 to 20 knots diminishing to 5 to
15 knots by midnight, then increasing to 10 to 20 knots late. A
chance of snow. Waves 3 to 5 feet occasionally to 7 feet
subsiding to 1 to 3 feet.
.FRIDAY...North winds 15 to 25 knots. Snow likely. Waves building
to 4 to 8 feet occasionally to 10 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots. A chance of snow.
Waves subsiding to 3 to 5 feet occasionally to 7 feet.
.SATURDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. A chance of snow showers. Waves
subsiding to 2 to 4 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A slight chance of snow showers. Waves
subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet.
.SUNDAY...North winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. Waves building to 3 to 6 feet occasionally to
8 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots. Waves building to
5 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 15 to 25 knots veering southeast. Waves
subsiding to calm to 2 feet, then building to 2 to 4 feet.
.TUESDAY...South winds 15 to 25 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.

$$

LSZ264-200900-
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 19 2026

.REST OF TONIGHT...Southeast winds 10 to 20 knots becoming east
5 to 15 knots by midnight, then increasing to 10 to 20 knots
late. A chance of snow. A slight chance of rain after midnight.
Waves 3 to 6 feet occasionally to 8 feet subsiding to 2 to
4 feet.
.FRIDAY...Northeast winds 15 to 25 knots backing north by mid
afternoon. Snow. Waves building to 4 to 8 feet occasionally to
10 feet.
.FRIDAY NIGHT...North winds 10 to 20 knots. A chance of snow.
Freezing spray after midnight. Waves subsiding to 3 to 5 feet
occasionally to 7 feet.
.SATURDAY...North winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. A chance of snow showers in the
morning. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...North winds 10 to 20 knots increasing to 15 to
25 knots after midnight. A slight chance of snow showers in the
evening. Waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet.
.SUNDAY...North winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. Heavy freezing spray in the afternoon. Waves
building to 5 to 8 feet occasionally to 10 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.
.MONDAY...North winds 20 to 30 knots becoming south 10 to
20 knots. Heavy freezing spray. 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 increasing to 20 to
30 knots. Freezing spray. 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.

$$

LSZ265-200900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1000 PM EST Thu Feb 19 2026

.REST OF TONIGHT...Southeast winds 10 to 20 knots backing
northeast late. A chance of snow after midnight. Waves 1 to
3 feet subsiding to calm to 2 feet, then building to 2 to 4 feet.
.FRIDAY...Northeast winds 15 to 25 knots backing north by mid
afternoon. Snow. Waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...North winds 15 to 25 knots backing northwest
late. Snow likely in the evening, then a chance of snow after
midnight. Waves 3 to 6 feet occasionally to 8 feet.
.SATURDAY...North winds 15 to 25 knots. Snow showers likely in
the morning, then a slight chance of snow showers in the
afternoon. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots. A chance of snow
showers. Waves subsiding to 1 to 3 feet, then building to 3 to
5 feet occasionally to 7 feet.
.SUNDAY...North winds 20 to 30 knots increasing to gales to
35 knots in the afternoon. Waves building to 6 to 9 feet
occasionally to 11 feet.
.SUNDAY NIGHT...North gales to 35 knots. Waves building to 9 to
12 feet occasionally to 15 feet.
.MONDAY...North winds 20 to 30 knots becoming south 10 to
20 knots. Waves subsiding to 1 to 3 feet, then building to 2 to
4 feet.
.TUESDAY...South winds 20 to 30 knots. 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.

Note, wave height forecasts are for ice free areas.

$$

LSZ266-200900-
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 19 2026

.REST OF TONIGHT...Southeast winds 15 to 25 knots backing east by
midnight. A slight chance of snow late in the evening. A slight
chance of rain. Snow, possibly mixed with freezing rain after
midnight. Waves 2 to 4 feet building to 3 to 5 feet occasionally
to 7 feet.
.FRIDAY...East winds 15 to 25 knots becoming northeast 20 to
30 knots. Rain likely in the morning. Snow. A slight chance of
rain in the afternoon. Waves building to 4 to 7 feet occasionally
to 9 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY NIGHT...Northeast winds 20 to 30 knots diminishing to
15 to 25 knots late. A slight chance of rain in the evening. A
chance of snow. Waves 3 to 6 feet occasionally to 8 feet.
.SATURDAY...Northeast winds 15 to 25 knots. A chance of snow
showers. Waves subsiding to 2 to 4 feet.
.SATURDAY NIGHT...North winds 15 to 25 knots. A chance of snow
showers. Waves building to 3 to 5 feet occasionally to 7 feet.
.SUNDAY...North winds 15 to 25 knots increasing to 20 to 30 knots
in the afternoon. A chance of snow showers. Freezing spray in the
afternoon. Waves building to 7 to 10 feet occasionally to
13 feet.
.SUNDAY NIGHT...North gales to 40 knots. Heavy freezing spray.
Waves building to 9 to 12 feet occasionally to 15 feet.
.MONDAY...North winds 20 to 30 knots diminishing to 15 to
25 knots. Heavy freezing spray. Waves subsiding to 2 to 4 feet,
then building to 3 to 5 feet occasionally to 7 feet.
.TUESDAY...South winds 20 to 30 knots increasing to gales to
35 knots. Freezing spray. A chance of snow showers. Waves
building to 8 to 11 feet occasionally to 14 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ267-200900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1000 PM EST Thu Feb 19 2026

.REST OF TONIGHT...Southeast winds 20 to 30 knots backing east
late. A chance of rain, possibly mixed with freezing rain and
snow. A chance of sleet after midnight. Waves 2 to 4 feet.
.FRIDAY...East winds 20 to 30 knots becoming northeast 15 to
25 knots by mid afternoon. Rain likely, possibly mixed with snow
in the morning, then snow, possibly mixed with rain in the
afternoon. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Northeast winds 15 to 25 knots. A chance of rain
in the evening. A chance of snow. Waves 2 to 4 feet.
.SATURDAY...East winds 10 to 20 knots backing northeast in the
afternoon. A chance of snow showers. Waves subsiding to calm to
2 feet.
.SATURDAY NIGHT...Northeast winds 10 to 20 knots. A slight chance
of snow showers in the evening. Waves building to 1 to 3 feet.
.SUNDAY...North winds 10 to 20 knots increasing to 15 to 25 knots
in the afternoon. Waves building to 3 to 5 feet occasionally to
7 feet.
.SUNDAY NIGHT...North winds 20 to 30 knots increasing to gales to
35 knots after midnight. Heavy freezing spray. Waves building to
6 to 9 feet occasionally to 11 feet.
.MONDAY...North winds 20 to 30 knots becoming northeast 10 to
20 knots. Heavy freezing spray. Waves subsiding to 2 to 4 feet.
.TUESDAY...Southeast winds 20 to 30 knots becoming south gales to
35 knots. Freezing spray. A chance of snow showers. Waves
building to 6 to 10 feet occasionally to 13 feet.

Note, wave height forecasts are for ice free areas.

$$

LSZ261-200900-
MAFOR 2004/
Superior West 13810 11827 11837 11830 11820 11810. Waves 2 to 4
feet subsiding to 1 to 3 feet overnight. Waves 1 to 3 feet
building to 3 to 6 feet Friday. Waves 3 to 5 feet subsiding to 2
to 4 feet Friday evening.

Superior North Central 11320 11220 11137 12147 11137 11837 11830.
Waves 3 to 5 feet subsiding to 2 to 4 feet overnight. Waves 5 to
8 feet Friday and Friday evening.

Superior South Central 11210 11220 11237 13137 12837. A chance of
rain overnight. Waves 1 to 2 feet building to 2 to 4 feet
overnight. Waves 3 to 6 feet building to 4 to 7 feet Friday.
Waves 4 to 6 feet Friday evening.

Superior East 11330 11237 11240 12247 11137 12140. A chance of
light freezing rain overnight and Friday morning. Waves 3 to 5
feet overnight. Waves 3 to 6 feet Friday. Waves 3 to 5 feet
Friday evening.

$$

WFO MQT

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