fzus63 kmqt 291555
glfls 
expires:202512300000;;443550

open lake forecast for lake superior
national weather service marquette mi
1055 am est mon dec 29 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...

28.9 inch low pressure currently analyzed over central lake huron 
moves into quebec today while further deepening to 28.8 inches. 
meanwhile, a strong high pressure of at least 30.6 inches is 
expanding across the great plains. a 29.7 inch trough dives 
southeast into the upper great lakes late tuesday. weak ridging of 
around 30.0 inches on wednesday will be followed up by additional 
29.6-29.7inch shortwaves skirting the region the rest of the work 
week.



lsz162-300000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1055 am est mon dec 29 2025 /955 am cst mon dec 29 2025/

...gale warning in effect until 10 pm est /9 pm cst/ this
evening...
...heavy freezing spray warning in effect until 10 pm est /9 pm
cst/ this evening...

.rest of today...north gales to 40 knots becoming northwest gales
to 35 knots by late morning, then diminishing to 20 to 30 knots
by mid afternoon. heavy freezing spray. waves 9 to 12 feet
occasionally to 15 feet subsiding to 5 to 8 feet occasionally to
10 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. freezing spray in the evening. waves subsiding to calm
to 2 feet. 
.tuesday...west winds 5 to 15 knots becoming northwest 10 to
20 knots by mid afternoon. snow showers. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.tuesday night...northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a slight chance of snow showers.
waves building to 2 to 4 feet. 
.wednesday...northwest winds 20 to 30 knots. a slight chance of
snow showers in the morning. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.wednesday night...northwest gales to 35 knots. waves building to
3 to 5 feet occasionally to 7 feet. 
.thursday...west gales to 35 knots. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 291555
glfls 
expires:202512300000;;443551

open lake forecast for lake superior
national weather service marquette mi
1055 am est mon dec 29 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...

28.9 inch low pressure currently analyzed over central lake huron 
moves into quebec today while further deepening to 28.8 inches. 
meanwhile, a strong high pressure of at least 30.6 inches is 
expanding across the great plains. a 29.7 inch trough dives 
southeast into the upper great lakes late tuesday. weak ridging of 
around 30.0 inches on wednesday will be followed up by additional 
29.6-29.7inch shortwaves skirting the region the rest of the work 
week.



lsz263-300000-
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-
1055 am est mon dec 29 2025

...gale warning in effect until 10 pm est this evening...
...heavy freezing spray warning in effect until 10 pm est this
evening...

.rest of today...north gales to 45 knots with a few storm force
gusts to 50 knots possible diminishing to gales to 45 knots by
late morning, then becoming northwest gales to 35 knots by mid
afternoon. a slight chance of snow late in the morning. heavy
freezing spray. waves 15 to 20 feet occasionally to 25 feet
subsiding to 8 to 11 feet occasionally to 14 feet. 
.tonight...northwest winds 20 to 30 knots diminishing to 15 to
25 knots by midnight. freezing spray in the evening. waves
subsiding to 2 to 4 feet. 
.tuesday...northwest winds 10 to 20 knots. a chance of snow
showers in the morning, then snow showers in the afternoon. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.tuesday night...northwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. heavy freezing spray. a chance of
snow showers. waves building to 5 to 8 feet occasionally to
10 feet. 
.wednesday...northwest winds 20 to 30 knots increasing to gales
to 35 knots in the afternoon. heavy freezing spray. a slight
chance of snow showers. waves subsiding to 4 to 8 feet
occasionally to 10 feet. 
.wednesday night...northwest gales to 35 knots. heavy freezing
spray. waves building to 6 to 9 feet occasionally to 11 feet. 
.thursday...west gales to 35 knots. heavy freezing spray. waves
building to 7 to 10 feet occasionally to 13 feet, then subsiding
to 5 to 8 feet occasionally to 10 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. heavy freezing spray. waves subsiding to 1 to 3 feet. 

$$