fzus63 kmqt 050901
glfls 
expires:202602052100;;117156

open lake forecast for lake superior
national weather service marquette mi
400 am est thu feb 5 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...

29.6 inch low pressure moving into far northern ontario drags a 29.8 
inch trough over the lake through the early morning hours. the low 
moves east over hudson bay toward quebec this evening, deepening to 
29.3 inches tonight. 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.



lsz162-052100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est thu feb 5 2026 /300 am cst thu feb 5 2026/

.early this morning...southwest winds 15 to 25 knots. a chance of
snow showers. waves 1 to 3 feet building to 2 to 4 feet. 
.today...southwest winds 10 to 20 knots veering west. a slight
chance of snow showers in the morning. waves subsiding to 1 to
3 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 15 to
25 knots late. a chance of rain showers in the evening. a chance
of 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 by mid 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 backing southeast in the
afternoon. waves calm to 2 feet. 
.saturday night...southeast winds 10 to 20 knots becoming south
5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 
.monday...south winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 050901
glfls 
expires:202602052100;;117157

open lake forecast for lake superior
national weather service marquette mi
400 am est thu feb 5 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...

29.6 inch low pressure moving into far northern ontario drags a 29.8 
inch trough over the lake through the early morning hours. the low 
moves east over hudson bay toward quebec this evening, deepening to 
29.3 inches tonight. 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.



lsz263-052100-
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 am est thu feb 5 2026

.early this morning...southwest winds 10 to 20 knots. snow
showers likely. waves 2 to 4 feet. 
.today...southwest winds 15 to 25 knots becoming west 10 to
20 knots. a slight chance of freezing drizzle in the morning. a
chance of snow showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 20 to
30 knots late. 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 winds to 30 knots with a few gale force gusts to
40 knots possible diminishing to 20 to 30 knots by mid afternoon.
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 southeast in the
afternoon. waves subsiding to calm to 2 feet. 
.saturday night...south winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 
.monday...south winds 5 to 15 knots backing northeast. waves
building to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$