fzus63 kmqt 270901
glfls 
expires:202602272100;;328532

open lake forecast for lake superior
national weather service marquette mi
400 am est fri feb 27 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 strong clipper low averaging 29.2 inches moves across northern 
ontario today and tonight, sending a 29.4 inch trough across the 
lake. high pressure builds over the lake this weekend, strengthening 
to 30.6 inches by sunday. ridging continues into early next week 
ahead of a weak 30.1 inch trough tuesday.



lsz162-272100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est fri feb 27 2026 /300 am cst fri feb 27 2026/

...gale warning in effect from 1 pm est /noon cst/ this afternoon
through late tonight...
...heavy freezing spray warning in effect from this evening
through saturday morning...

.early this morning...southwest winds 10 to 20 knots. a slight
chance of snow showers. waves calm to 2 feet. 
.today...southwest winds 15 to 25 knots increasing to gales to
35 knots by late morning, then becoming west gales to 45 knots by
mid afternoon. waves building to 8 to 11 feet occasionally to
14 feet. 
.tonight...west gales to 45 knots becoming northwest gales to
35 knots by midnight, then diminishing to 15 to 25 knots late.
heavy freezing spray in the evening. waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 2 to 4 feet. 
.saturday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.saturday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west in the
afternoon. waves calm to 2 feet. 
.sunday night...southeast winds 5 to 15 knots veering south after
midnight. waves building to 1 to 3 feet. 
.monday...southwest winds 10 to 20 knots increasing to gales to
35 knots. waves building to 4 to 8 feet occasionally to 10 feet. 
.tuesday...southwest winds 20 to 30 knots becoming west 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 270901
glfls 
expires:202602272100;;328533

open lake forecast for lake superior
national weather service marquette mi
400 am est fri feb 27 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 strong clipper low averaging 29.2 inches moves across northern 
ontario today and tonight, sending a 29.4 inch trough across the 
lake. high pressure builds over the lake this weekend, strengthening 
to 30.6 inches by sunday. ridging continues into early next week 
ahead of a weak 30.1 inch trough tuesday.



lsz263-272100-
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 fri feb 27 2026

...gale warning in effect from 1 pm est this afternoon through
late tonight...
...heavy freezing spray warning in effect from this evening
through saturday morning...

.early this morning...south winds 5 to 15 knots. a slight chance
of snow showers. waves calm to 2 feet. 
.today...southwest winds 15 to 25 knots increasing to gales to
35 knots by late morning, then becoming west gales to 45 knots by
mid afternoon. a slight chance of snow showers. waves building to
10 to 14 feet occasionally to 18 feet. 
.tonight...west gales to 45 knots becoming northwest gales to
40 knots by midnight, then diminishing to 20 to 30 knots late.
heavy freezing spray. waves building to 12 to 17 feet
occasionally to 21 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 5 to
15 knots. a slight chance of snow showers in the morning. waves
subsiding to calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots veering north
after midnight. a slight chance of snow showers in the evening.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.sunday...northwest winds 5 to 15 knots backing west in the
afternoon. waves calm to 2 feet. 
.sunday night...south winds 5 to 15 knots. waves building to 2 to
4 feet. 
.monday...southwest winds 10 to 20 knots increasing to gales to
35 knots. waves building to 7 to 11 feet occasionally to 14 feet.
.tuesday...southwest winds 20 to 30 knots veering west. waves
subsiding to 2 to 4 feet, then building to 3 to 6 feet
occasionally to 8 feet. 

note, wave height forecasts are for ice free areas.

$$