fzus63 kmqt 292101
glfls 
expires:202512300900;;455943

open lake forecast for lake superior
national weather service marquette mi
400 pm 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.



lsz162-300900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est mon dec 29 2025 /300 pm 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...

.late this afternoon...northwest winds 20 to 30 knots. freezing
spray. waves 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. a slight chance of snow
showers after midnight. 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 calm to 2 feet. 
.tuesday night...northwest winds 15 to 25 knots. a slight chance
of snow showers. waves building to 3 to 5 feet occasionally to
7 feet. 
.wednesday...northwest winds 15 to 25 knots increasing to 20 to
30 knots in the afternoon. a slight chance of snow showers in the
morning. waves 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 winds 20 to 30 knots. heavy freezing spray.
waves building to 3 to 6 feet occasionally to 8 feet. 
.thursday night...west winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. waves subsiding to 2 to 4 feet. 
.friday...west winds 10 to 20 knots veering northwest. waves
subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots becoming southwest 10 to
20 knots. waves calm to 2 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 292101
glfls 
expires:202512300900;;455944

open lake forecast for lake superior
national weather service marquette mi
400 pm 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.



lsz263-300900-
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 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...

.late this afternoon...northwest gales to 35 knots. freezing
spray. waves 7 to 10 feet occasionally to 13 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. 
.tuesday night...north winds 10 to 20 knots increasing to 15 to
25 knots by midnight, then becoming northwest 20 to 30 knots
late. a chance of snow showers. freezing spray after midnight.
waves building to 4 to 7 feet occasionally to 9 feet. 
.wednesday...northwest winds 20 to 30 knots increasing to gales
to 35 knots in the afternoon. a slight chance of snow showers in
the morning. heavy freezing spray. waves building 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...northwest gales to 40 knots becoming west gales to
35 knots in the afternoon. heavy freezing spray. waves building
to 7 to 10 feet occasionally to 13 feet. 
.thursday night...west gales to 35 knots becoming northwest 20 to
30 knots after midnight. freezing spray. waves subsiding to 5 to
8 feet occasionally to 10 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 15 to
25 knots. freezing spray. waves subsiding to 1 to 3 feet. 
.saturday...northwest winds 5 to 15 knots becoming southwest
10 to 20 knots. waves building to 2 to 4 feet. 

note, wave height forecasts are for ice free areas.

$$