fzus63 kmqt 220901
glfls 
expires:202602222100;;057303

open lake forecast for lake superior
national weather service marquette mi
400 am 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 30.0 inch low over lake huron this morning becomes slowly absorbed 
into a 28.7 inch nor'easter off the delmarva peninsula by monday 
while a 31.3 inch high pressure moves through northern saskatchewan 
today before weakening to 30.9 inches over northern ontario monday 
morning. this high extends 30.7 inch ridging over western lake 
superior monday morning. as the parent high continues weakening 
monday and monday night before arriving at the ontario/quebec border 
at 30.2 inches tuesday morning, broad 29.8 inch troughing forms over 
the plains, eventually sending at least one clipper low of around 
29.4 inches 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 thursday into friday.



lsz162-222100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est sun feb 22 2026 /300 am cst sun feb 22 2026/

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

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

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 220901
glfls 
expires:202602222100;;057304

open lake forecast for lake superior
national weather service marquette mi
400 am 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 30.0 inch low over lake huron this morning becomes slowly absorbed 
into a 28.7 inch nor'easter off the delmarva peninsula by monday 
while a 31.3 inch high pressure moves through northern saskatchewan 
today before weakening to 30.9 inches over northern ontario monday 
morning. this high extends 30.7 inch ridging over western lake 
superior monday morning. as the parent high continues weakening 
monday and monday night before arriving at the ontario/quebec border 
at 30.2 inches tuesday morning, broad 29.8 inch troughing forms over 
the plains, eventually sending at least one clipper low of around 
29.4 inches 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 thursday into friday.



lsz263-222100-
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 sun feb 22 2026

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

.early this morning...north winds 15 to 25 knots. heavy freezing
spray. a slight chance of snow showers. waves 4 to 7 feet
occasionally to 9 feet. 
.today...north winds 20 to 30 knots increasing to 30 knots with a
few gale force gusts to 35 knots possible by mid afternoon. heavy
freezing spray. a chance of snow showers. waves building to 6 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 late. heavy
freezing spray. a slight chance of 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. a slight chance of snow showers in the morning.
waves subsiding to 1 to 3 feet. 
.monday night...southeast winds 5 to 15 knots becoming south
15 to 25 knots after midnight. a chance of snow showers 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 showers likely 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 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 5 feet
occasionally to 7 feet. 
.wednesday...northwest winds 15 to 25 knots diminishing to 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 3 to 5 feet occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$