fzus63 kmqt 150801
glfls 
expires:202603152000;;704012

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun mar 15 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...

throughout today, a 29.3 inch low deepens to 29.1 inches as it moves 
from over eastern kansas to over the michigan lower peninsula. the 
low then slowly shifts over northern lake huron by monday afternoon, 
maintaining near 29.1 inches. by monday night, lake superior will be 
between the low as it shifts into quebec and a 30.3 inch high over 
the northern plains. this low shifts south of the great lakes basin 
through tuesday, extending weak 30.0 inch ridging over lake 
superior. wednesday morning, 29.5 inch low pressure over the 
canadian prairie will begin to push towards the lake, weakening to 
29.8 inches over the western end of the lake wednesday night. weak 
ridging of around 30.1 inches will be over the lake thursday evening 
ahead of the next clipper low moving over northern ontario by friday 
afternoon at around 29.6 inches.



lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sun mar 15 2026 /300 am cdt sun mar 15 2026/

...gale warning in effect from 8 am edt /7 am cdt/ this morning
through this evening...
...heavy freezing spray warning in effect from 8 am edt /7 am
cdt/ this morning through late monday night...
...storm warning in effect from this evening through monday
morning...

.early this morning...northeast winds 20 to 30 knots. a chance of
snow. waves 3 to 5 feet occasionally to 7 feet building to 5 to
8 feet occasionally to 10 feet. 
.today...northeast gales to 45 knots. freezing spray. snow. waves
building to 15 to 20 feet occasionally to 25 feet. 
.tonight...north gales to 45 knots increasing to storm force
winds to 50 knots late. heavy freezing spray. a chance of snow.
waves 15 to 20 feet occasionally to 25 feet. 
.monday...north storm force winds to 50 knots diminishing to
gales to 45 knots in the afternoon. heavy freezing spray. a
slight chance of snow. waves subsiding to 7 to 10 feet
occasionally to 13 feet. 
.monday night...north gales to 35 knots diminishing to 15 to
25 knots after midnight. heavy freezing spray through midnight.
waves subsiding to 2 to 4 feet. 
.tuesday...northwest winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...south winds 15 to 25 knots veering southwest
after midnight. snow showers likely through midnight, then a
chance of snow showers after midnight. waves building to 2 to
4 feet. 
.wednesday...southwest winds 10 to 20 knots veering west. a
chance of rain and snow showers. waves subsiding to calm to
2 feet. 
.thursday...south winds 5 to 15 knots veering southwest. a chance
of rain and snow showers. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 150801
glfls 
expires:202603152000;;704013

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun mar 15 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...

throughout today, a 29.3 inch low deepens to 29.1 inches as it moves 
from over eastern kansas to over the michigan lower peninsula. the 
low then slowly shifts over northern lake huron by monday afternoon, 
maintaining near 29.1 inches. by monday night, lake superior will be 
between the low as it shifts into quebec and a 30.3 inch high over 
the northern plains. this low shifts south of the great lakes basin 
through tuesday, extending weak 30.0 inch ridging over lake 
superior. wednesday morning, 29.5 inch low pressure over the 
canadian prairie will begin to push towards the lake, weakening to 
29.8 inches over the western end of the lake wednesday night. weak 
ridging of around 30.1 inches will be over the lake thursday evening 
ahead of the next clipper low moving over northern ontario by friday 
afternoon at around 29.6 inches.



lsz263-152000-
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 edt sun mar 15 2026

...gale warning in effect from 8 am edt this morning through this
evening...
...heavy freezing spray warning in effect from 2 pm edt this
afternoon through tuesday afternoon...
...storm warning in effect from this evening through monday
afternoon...

.early this morning...east winds 15 to 25 knots. a slight chance
of snow. waves 1 to 3 feet building to 3 to 5 feet occasionally
to 7 feet. 
.today...northeast gales to 45 knots. freezing spray. snow. waves
building to 15 to 20 feet occasionally to 25 feet. 
.tonight...northeast gales to 45 knots becoming north storm force
winds to 55 knots after midnight. heavy freezing spray. a chance
of snow. waves building to 20 to 25 feet occasionally to 31 feet.
.monday...north storm force winds to 55 knots diminishing to
gales to 45 knots in the afternoon. heavy freezing spray. a
chance of snow. waves subsiding to 12 to 17 feet occasionally to
21 feet. 
.monday night...north gales to 45 knots. heavy freezing spray.
waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.tuesday...northwest winds 15 to 25 knots becoming southwest 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...south winds 15 to 25 knots. a chance of snow
showers. waves building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of snow showers. waves subsiding to calm to
2 feet, then building to 2 to 4 feet. 
.thursday...southwest winds 5 to 15 knots becoming south 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet. 

$$