290
FZUS63 KMQT 200301
GLFLS

Open Lake Forecast for Lake Superior
National Weather Service Marquette MI
1001 PM EST Wed Nov 19 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 29.8 inch trough moves over the lake on Thursday as a developing
29.7 inch low over northern Manitoba moves into Hudson Bay. A 30.1
inch ridge of high pressure over the Northern Plains and Upper
Midwest on Friday moves over the Great Lakes on Saturday. Another
29.8 inch trough then moves over Lake Superior Saturday night into
Sunday before 30.1 inch high pressure rebuilds over the Great Lakes
early next week.


LSZ162-200900-
Lake Superior west of a line from Saxon Harbor WI to Grand
Portage MN beyond 5NM-
1001 PM EST Wed Nov 19 2025 /901 PM CST Wed Nov 19 2025/

.REST OF TONIGHT...Southwest winds 15 to 25 knots. A chance of
rain showers. Waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...Southwest winds 15 to 25 knots veering west. A chance
of rain showers in the morning. Waves subsiding to 2 to 4 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots diminishing to 10 to
20 knots late. Waves subsiding to 1 to 3 feet, then building to
2 to 4 feet.
.FRIDAY...Northwest winds 10 to 20 knots. Waves subsiding to calm
to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...West winds 10 to 20 knots. Waves calm to
2 feet.
.SUNDAY...West winds 10 to 20 knots. Waves calm to 2 feet.
.MONDAY...West winds 10 to 20 knots becoming southeast 5 to
15 knots. Waves calm to 2 feet.

$$

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-
1001 PM EST Wed Nov 19 2025

.REST OF TONIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight. A chance of rain showers. Waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet.
.THURSDAY...Southwest winds 15 to 25 knots veering west. Patchy
fog in the morning. A chance of rain showers. Waves building to
3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 10 to 20 knots increasing to 15 to
25 knots by midnight. Waves building to 3 to 6 feet occasionally
to 8 feet.
.FRIDAY...Northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. Waves subsiding to calm to 2 feet.
.FRIDAY NIGHT...Northwest winds 5 to 15 knots backing southwest
after midnight. Waves calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots. Waves building to
1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. Waves building to 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots becoming southeast 5 to
15 knots. Waves subsiding to calm to 2 feet.

$$

LSZ264-200900-
Lake Superior from Upper Entrance to Portage Canal to Manitou
Island MI 5NM off shore to the US/Canadian Border-
1001 PM EST Wed Nov 19 2025

.REST OF TONIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots late. A chance of rain showers late in the
evening, then rain showers likely after midnight. Waves 2 to
4 feet building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY...Southwest winds 15 to 25 knots veering west. Patchy
fog in the morning. Rain showers likely in the morning, then a
chance of rain showers in the afternoon. Waves 3 to 6 feet
occasionally to 8 feet.
.THURSDAY NIGHT...Northwest winds 15 to 25 knots becoming west
10 to 20 knots by midnight, then increasing to 15 to 25 knots
late. Waves subsiding to 3 to 6 feet occasionally to 8 feet.
.FRIDAY...Northwest winds 15 to 25 knots. Waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots becoming west 5 to
15 knots after midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots. Waves building to
1 to 3 feet.
.SATURDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. Waves building to 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves subsiding to 1 to 3 feet.
.MONDAY...West winds 10 to 20 knots backing southeast. Waves
building to 2 to 4 feet, then subsiding to calm to 2 feet.

$$

LSZ265-200900-
Lake Superior West of Line from Manitou Island to Marquette MI
Beyond 5NM from shore-
1001 PM EST Wed Nov 19 2025

.REST OF TONIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight. A chance of rain showers. Waves calm
to 2 feet building to 1 to 3 feet.
.THURSDAY...Southwest winds 15 to 25 knots increasing to 20 to
30 knots by late morning, then veering west by mid afternoon. A
chance of rain showers. Waves building to 2 to 4 feet.
.THURSDAY NIGHT...West winds 20 to 30 knots. A slight chance of
rain showers in the evening. Waves building to 3 to 5 feet
occasionally to 7 feet.
.FRIDAY...Northwest winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. A slight chance of rain and snow
showers in the morning. Waves subsiding to 2 to 4 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots backing west after
midnight. Waves subsiding to calm to 2 feet.
.SATURDAY...Southwest winds 10 to 20 knots. Waves calm to 2 feet.
.SATURDAY NIGHT...Southwest winds 10 to 20 knots veering west
after midnight. Waves calm to 2 feet.
.SUNDAY...West winds 15 to 25 knots. Waves calm to 2 feet.
.MONDAY...West winds 15 to 25 knots diminishing to 10 to
20 knots. Waves building to 1 to 3 feet, then subsiding to calm
to 2 feet.

$$

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-
1001 PM EST Wed Nov 19 2025

.REST OF TONIGHT...Southwest winds 15 to 25 knots. A slight
chance of rain showers. Waves 1 to 3 feet building to 3 to 5 feet
occasionally to 7 feet.
.THURSDAY...Southwest winds 15 to 25 knots veering west by mid
afternoon. Patchy fog in the morning. A chance of rain showers.
Waves building to 3 to 6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots by midnight, then diminishing to 15 to 25 knots late. A
chance of rain showers. Waves building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY...Northwest winds 20 to 30 knots. A chance of snow
showers, possibly mixed with rain. Waves building to 4 to 8 feet
occasionally to 10 feet.
.FRIDAY NIGHT...Northwest winds 10 to 20 knots. Waves subsiding
to 2 to 4 feet.
.SATURDAY...Southwest winds 10 to 20 knots becoming south 15 to
25 knots in the afternoon. Waves 2 to 4 feet.
.SATURDAY NIGHT...Southwest winds 15 to 25 knots veering west
after midnight. A chance of rain showers. Waves 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves 2 to 4 feet.
.MONDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. Waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet.

$$

LSZ267-200900-
Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off
shore to the US/Canadian border-
1001 PM EST Wed Nov 19 2025

.REST OF TONIGHT...Southwest winds 10 to 20 knots increasing to
15 to 25 knots by midnight. A slight chance of rain showers after
midnight. Waves 1 to 3 feet building to 3 to 5 feet occasionally
to 7 feet.
.THURSDAY...Southwest winds 15 to 25 knots. A chance of rain
showers in the morning, then rain showers likely in the
afternoon. Patchy fog in the afternoon. Waves building to 3 to
6 feet occasionally to 8 feet.
.THURSDAY NIGHT...West winds 15 to 25 knots increasing to 20 to
30 knots late. A chance of rain showers. Waves subsiding to 3 to
5 feet occasionally to 7 feet, then building to 4 to 7 feet
occasionally to 9 feet.
.FRIDAY...West winds 20 to 30 knots becoming northwest gales to
35 knots in the afternoon. A chance of rain showers, possibly
mixed with snow. Waves building to 5 to 8 feet occasionally to
10 feet.
.FRIDAY NIGHT...Northwest winds 15 to 25 knots. Waves subsiding
to 2 to 4 feet.
.SATURDAY...Southwest winds 15 to 25 knots backing south in the
afternoon. Waves 2 to 4 feet.
.SATURDAY NIGHT...Southwest winds 15 to 25 knots. A chance of
rain showers. Waves 2 to 4 feet.
.SUNDAY...West winds 15 to 25 knots. A chance of rain showers.
Waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet.
.MONDAY...West winds 15 to 25 knots becoming northwest 10 to
20 knots. A chance of rain showers. Waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet.

$$

LSZ261-200900-
MAFOR 2004/
Superior West 14530 12630 12620. A chance of showers overnight
and Thursday morning. Waves 2 to 4 feet overnight and Thursday.
Waves 2 to 4 feet subsiding to 1 to 3 feet Thursday evening.

Superior North Central 11520 11530 13536 12630 11730. Waves 2 to
4 feet building to 3 to 5 feet overnight. Waves 3 to 6 feet
Thursday and Thursday evening.

Superior South Central 13520 11526 12530 12630. Waves 1 to 3 feet
overnight. Waves 1 to 3 feet building to 2 to 4 feet Thursday.
Waves 3 to 5 feet Thursday evening.

Superior East 11520 13530 12536 12630. Waves 2 to 4 feet building
to 3 to 5 feet overnight. Waves 3 to 6 feet Thursday and Thursday
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