fzus63 kmqt 042101
glfls 
expires:202602050900;;090788

open lake forecast for lake superior
national weather service marquette mi
400 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...

30.3 inch high pressure remains over lake superior through this 
evening as a 30.4 inch ridge extends from the central plains into 
northern ontario. a 29.6 inch trough will cross the lake thursday 
into thursday night as a 29.6 inch low over northern manitoba 
deepens to 29.3 inches over james bay by friday morning. the trough 
pushes east friday night, allowing a 30.5 inch high to move over the 
lake on saturday. the high will shift east on 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-
400 pm est wed feb 4 2026 /300 pm cst wed feb 4 2026/

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...southwest winds 5 to 15 knots increasing to 15 to
25 knots. a chance of snow showers. waves 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 042101
glfls 
expires:202602050900;;090789

open lake forecast for lake superior
national weather service marquette mi
400 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...

30.3 inch high pressure remains over lake superior through this 
evening as a 30.4 inch ridge extends from the central plains into 
northern ontario. a 29.6 inch trough will cross the lake thursday 
into thursday night as a 29.6 inch low over northern manitoba 
deepens to 29.3 inches over james bay by friday morning. the trough 
pushes east friday night, allowing a 30.5 inch high to move over the 
lake on saturday. the high will shift east on 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-
400 pm est wed feb 4 2026

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...southwest winds 5 to 15 knots increasing to 15 to
25 knots. a slight chance of snow showers in the evening, then
snow showers likely after midnight. waves building to 2 to
4 feet. 
.thursday...southwest winds 15 to 25 knots becoming west 10 to
20 knots. a chance of snow showers in the morning. 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 6 to 9 feet occasionally
to 11 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 calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$