fzus63 kmqt 021500
glfls 
expires:202512022100;;884107

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue dec 2 2025

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 weak 29.9 inch trough is over lake superior this morning. this 
trough will be absorbed by a 29.7 inch trough associated with a 29.5 
inch low over hudson bay today. the trough exits the lake to the 
east by wednesday morning. in its wake, a 30.5 inch high builds over 
the dakotas wednesday evening. as this high shifts into the lower 
midwest thursday, it will pass a 30.2 inch ridge over the lake. 
meanwhile, a 29.7 inch low will move over lake winnipeg before 
passing north of the lake overnight into friday at 29.6 inches. 
friday night, another 29.7 inch trough will pass over the lake. over 
the weekend, lake superior will be between a 30.3 inch high over 
saskatchewan and a low of 29.6 inches over quebec, with the high 
approaching lake superior late in the weekend to early next week.



lsz162-022100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am est tue dec 2 2025 /900 am cst tue dec 2 2025/

.rest of today...southwest winds 10 to 20 knots increasing to
20 to 30 knots. a chance of snow showers. waves 2 to 4 feet
building to 4 to 7 feet occasionally to 9 feet. 
.tonight...southwest winds 20 to 30 knots becoming west 15 to
25 knots by midnight, then veering northwest late. snow showers
likely in the evening, then a chance of snow showers after
midnight. waves subsiding to 2 to 4 feet. 
.wednesday...northwest winds 20 to 30 knots. a slight chance of
snow showers in the morning. freezing spray in the afternoon.
waves building to 4 to 7 feet occasionally to 9 feet. 
.wednesday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. freezing spray in the evening. a
slight chance of snow showers in the evening. waves subsiding to
2 to 4 feet. 
.thursday...west winds 15 to 25 knots becoming southwest gales to
35 knots in the afternoon. a slight chance of snow showers in the
afternoon. waves subsiding to 1 to 3 feet, then building to 4 to
7 feet occasionally to 9 feet. 
.thursday night...southwest gales to 35 knots becoming west 20 to
30 knots after midnight. freezing spray in the evening. snow
showers likely in the evening, then a chance of snow showers
after midnight. waves building to 5 to 8 feet occasionally to
10 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. 
.friday...west winds 10 to 20 knots veering northwest. a chance
of snow showers. waves subsiding to calm to 2 feet, then building
to 1 to 3 feet. 
.saturday...northwest winds 10 to 20 knots veering north. waves
subsiding to calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 021500
glfls 
expires:202512022100;;884108

open lake forecast for lake superior
national weather service marquette mi
1000 am est tue dec 2 2025

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 weak 29.9 inch trough is over lake superior this morning. this 
trough will be absorbed by a 29.7 inch trough associated with a 29.5 
inch low over hudson bay today. the trough exits the lake to the 
east by wednesday morning. in its wake, a 30.5 inch high builds over 
the dakotas wednesday evening. as this high shifts into the lower 
midwest thursday, it will pass a 30.2 inch ridge over the lake. 
meanwhile, a 29.7 inch low will move over lake winnipeg before 
passing north of the lake overnight into friday at 29.6 inches. 
friday night, another 29.7 inch trough will pass over the lake. over 
the weekend, lake superior will be between a 30.3 inch high over 
saskatchewan and a low of 29.6 inches over quebec, with the high 
approaching lake superior late in the weekend to early next week.



lsz263-022100-
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-
1000 am est tue dec 2 2025

.rest of today...southwest winds 15 to 25 knots. a chance of snow
showers. waves 3 to 5 feet occasionally to 7 feet building to
4 to 7 feet occasionally to 9 feet. 
.tonight...southwest winds 15 to 25 knots veering northwest late.
snow showers likely. waves building to 5 to 8 feet occasionally
to 10 feet, then subsiding to 3 to 6 feet occasionally to 8 feet.
.wednesday...northwest winds 20 to 30 knots. freezing spray. a
chance of snow showers. waves building to 5 to 8 feet
occasionally to 10 feet. 
.wednesday night...northwest winds 20 to 30 knots. freezing
spray. a slight chance of snow showers. waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.thursday...west winds 15 to 25 knots becoming southwest gales to
35 knots in the afternoon. freezing spray in the morning. a
slight chance of snow showers in the afternoon. waves subsiding
to 2 to 4 feet, then building to 4 to 7 feet occasionally to
9 feet. 
.thursday night...southwest gales to 40 knots becoming west 20 to
30 knots after midnight. freezing spray in the evening. snow
showers likely in the evening, then a chance of snow showers
after midnight. waves building to 6 to 9 feet occasionally to
11 feet, then subsiding to 4 to 7 feet occasionally to 9 feet. 
.friday...west winds 15 to 25 knots veering northwest. a chance
of snow showers. waves subsiding to 2 to 4 feet. 
.saturday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$