fzus63 kmqt 050301
glfls 
expires:202602050900;;103888

open lake forecast for lake superior
national weather service marquette mi
1000 pm est wed feb 4 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...

the 30.2 inch ridge currently over lake superior gives way to a 29.8 
inch trough tonight through thursday as a 29.6 inch low over 
northern manitoba moves to far northern ontario. the low moves east 
over hudson bay toward quebec, deepening to 29.3 inches thursday 
night. as a result, the trough over lake superior deepens to 29.6 
inches then presses east on friday, allowing a 30.5 inch high to 
move over the lake by saturday. the high will shift east through 
sunday in advance of another weak trough moving into the great lakes 
early next week, but exact strength and timing of this feature 
remain uncertain.



lsz162-050900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est wed feb 4 2026 /900 pm cst wed feb 4 2026/

.rest of tonight...southwest winds 5 to 15 knots increasing to
15 to 25 knots. a chance of snow showers. waves calm to 2 feet
building to 2 to 4 feet. 
.thursday...southwest winds 15 to 25 knots becoming west 10 to
20 knots. a slight chance of snow showers in the morning. waves
subsiding to 1 to 3 feet. 
.thursday night...west winds 10 to 20 knots becoming northwest
15 to 25 knots late. a chance of rain and snow showers. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.friday...north winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.friday night...north winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...south winds 5 to 15 knots. waves calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. a chance of snow showers in the
evening. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 
.monday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 050301
glfls 
expires:202602050900;;103889

open lake forecast for lake superior
national weather service marquette mi
1000 pm est wed feb 4 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...

the 30.2 inch ridge currently over lake superior gives way to a 29.8 
inch trough tonight through thursday as a 29.6 inch low over 
northern manitoba moves to far northern ontario. the low moves east 
over hudson bay toward quebec, deepening to 29.3 inches thursday 
night. as a result, the trough over lake superior deepens to 29.6 
inches then presses east on friday, allowing a 30.5 inch high to 
move over the lake by saturday. the high will shift east through 
sunday in advance of another weak trough moving into the great lakes 
early next week, but exact strength and timing of this feature 
remain uncertain.



lsz263-050900-
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 wed feb 4 2026

.rest of tonight...southwest winds 5 to 15 knots increasing to
15 to 25 knots. a slight chance of snow showers late in the
evening, then snow showers likely after midnight. waves calm to
2 feet building to 2 to 4 feet. 
.thursday...southwest winds 15 to 25 knots becoming west 10 to
20 knots. a chance of snow showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.thursday night...west winds 10 to 20 knots becoming northwest
20 to 30 knots late. a slight chance of rain showers in the
evening. a chance of snow showers. waves subsiding to 1 to
3 feet, then building to 3 to 6 feet occasionally to 8 feet. 
.friday...north gales to 40 knots diminishing to 20 to 30 knots
in the afternoon. a slight chance of snow showers in the morning.
heavy freezing spray. waves building to 7 to 10 feet occasionally
to 13 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.friday night...north winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.saturday...north winds 5 to 15 knots veering south in the
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...south winds 5 to 15 knots. a chance of snow
showers in the evening. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 
.monday...east winds 5 to 15 knots. waves building to 1 to
3 feet. 

note, wave height forecasts are for ice free areas.

$$