fzus63 kmqt 222101
glfls 
expires:202602230900;;084908

open lake forecast for lake superior
national weather service marquette mi
400 pm est sun feb 22 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 30.9 inch high moving over ontario tonight will gradually weaken 
troughing over lake superior, eventually extending 30.7 inch ridging 
over the lake by monday morning. the high will weaken monday and 
monday night before arriving at the ontario/quebec border at 30.2 
inches tuesday morning. a deepening 29.7 inch low will move through 
the northern plains monday night, eventually deepening to 29.4 
inches as it moves through the upper great lakes late tuesday 
through wednesday morning. weak ridging then builds back over lake 
superior at around 29.8 inches for wednesday night before the next 
clipper low approaches the lake from the northwest friday.



lsz162-230900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est sun feb 22 2026 /300 pm cst sun feb 22 2026/

...heavy freezing spray warning in effect through monday
morning...

.late this afternoon...north winds 20 to 30 knots. isolated snow
showers. waves 3 to 5 feet occasionally to 7 feet. 
.tonight...north winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. heavy freezing spray in the evening.
scattered snow showers. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.monday...north winds 10 to 20 knots becoming northeast 5 to
15 knots by late morning, then veering east by mid afternoon.
isolated snow showers in the morning. waves subsiding to calm to
2 feet. 
.monday night...southeast winds 10 to 20 knots becoming south
15 to 25 knots late. a chance of snow. waves building to 3 to
5 feet occasionally to 7 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest 10 to
20 knots in the afternoon. snow in the morning, then a chance of
snow in the afternoon. waves building to 3 to 6 feet occasionally
to 8 feet, then subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday...northwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. waves calm to 2 feet. 
.friday...southwest winds 15 to 25 knots becoming west gales to
35 knots. freezing spray. waves building to 4 to 7 feet
occasionally to 9 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 222101
glfls 
expires:202602230900;;084909

open lake forecast for lake superior
national weather service marquette mi
400 pm est sun feb 22 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 30.9 inch high moving over ontario tonight will gradually weaken 
troughing over lake superior, eventually extending 30.7 inch ridging 
over the lake by monday morning. the high will weaken monday and 
monday night before arriving at the ontario/quebec border at 30.2 
inches tuesday morning. a deepening 29.7 inch low will move through 
the northern plains monday night, eventually deepening to 29.4 
inches as it moves through the upper great lakes late tuesday 
through wednesday morning. weak ridging then builds back over lake 
superior at around 29.8 inches for wednesday night before the next 
clipper low approaches the lake from the northwest friday.



lsz263-230900-
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 sun feb 22 2026

...heavy freezing spray warning in effect through monday
afternoon...

.late this afternoon...north winds to 30 knots with a few gale
force gusts to 35 knots possible. heavy freezing spray. scattered
snow showers. waves 5 to 9 feet occasionally to 11 feet. 
.tonight...north winds to 30 knots with a few gale force gusts to
35 knots possible diminishing to 20 to 30 knots by midnight.
heavy freezing spray. scattered snow showers. waves building to
7 to 10 feet occasionally to 13 feet, then subsiding to 5 to
8 feet occasionally to 10 feet. 
.monday...north winds 15 to 25 knots becoming northeast 10 to
20 knots by late morning, then diminishing to 5 to 15 knots by
mid afternoon. scattered snow showers. waves subsiding to 1 to
3 feet. 
.monday night...east winds 5 to 15 knots becoming southeast 10 to
20 knots by midnight, then becoming south 15 to 25 knots late. a
chance of snow after midnight. waves subsiding to calm to 2 feet,
then building to 3 to 5 feet occasionally to 7 feet. 
.tuesday...south winds 15 to 25 knots. snow. waves building to
3 to 6 feet occasionally to 8 feet, then subsiding to 2 to
4 feet. 
.tuesday night...northwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.wednesday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. waves subsiding to 1 to 3 feet. 
.wednesday night...northwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. waves building to 1 to 3 feet. 
.friday...southwest winds 20 to 30 knots becoming west gales to
40 knots. freezing spray. waves building to 8 to 11 feet
occasionally to 14 feet. 

note, wave height forecasts are for ice free areas.

$$