fzus63 kmqt 120901
glfls 
expires:202601122100;;214653

open lake forecast for lake superior
national weather service marquette mi
401 am est mon jan 12 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 weak 29.8 inch trough drops over lake superior tonight, extending 
southward from  29.5 inch low pressure over hudson bay. a weak 29.9 
inch ridge then moves over the lake monday night ahead of a 29.4 
inch low over manitoba. this low deepens to 29.3 inches as it moves 
over lake superior tuesday afternoon before moving into southern 
quebec by wednesday morning. meanwhile, 30.6 inch high pressure 
builds over the dakotas during the middle of next week and shifts 
east to the great lakes late wednesday into thursday. this will be 
followed up by 29.7 inch troughing moving over the lake friday.



lsz162-122100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am est mon jan 12 2026 /301 am cst mon jan 12 2026/

...gale watch in effect from tuesday evening through wednesday
afternoon...

.early this morning...west winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.today...west winds 15 to 25 knots diminishing to 10 to 20 knots.
waves subsiding to 1 to 3 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 15 to
25 knots late. a chance of rain showers, possibly mixed with snow
after midnight. waves subsiding to calm to 2 feet, then building
to 2 to 4 feet. 
.tuesday...west winds 15 to 25 knots. a chance of snow showers in
the morning. a chance of rain showers. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.tuesday night...north gales to 40 knots. a chance of rain
showers in the evening. a chance of snow showers. heavy freezing
spray after midnight. waves building to 7 to 10 feet occasionally
to 13 feet. 
.wednesday...north gales to 35 knots diminishing to 15 to
25 knots in the afternoon. heavy freezing spray in the morning.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.wednesday night...north winds 15 to 25 knots becoming west 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 15 to 25 knots. a chance of snow
showers. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 
.friday...northwest winds 15 to 25 knots becoming north 20 to
30 knots. a chance of snow showers. waves subsiding to calm to
2 feet, then building to 1 to 3 feet. 

note, wave height forecasts are for ice free areas.

$$

fzus63 kmqt 120901
glfls 
expires:202601122100;;214654

open lake forecast for lake superior
national weather service marquette mi
401 am est mon jan 12 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 weak 29.8 inch trough drops over lake superior tonight, extending 
southward from  29.5 inch low pressure over hudson bay. a weak 29.9 
inch ridge then moves over the lake monday night ahead of a 29.4 
inch low over manitoba. this low deepens to 29.3 inches as it moves 
over lake superior tuesday afternoon before moving into southern 
quebec by wednesday morning. meanwhile, 30.6 inch high pressure 
builds over the dakotas during the middle of next week and shifts 
east to the great lakes late wednesday into thursday. this will be 
followed up by 29.7 inch troughing moving over the lake friday.



lsz263-122100-
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-
401 am est mon jan 12 2026

...gale watch in effect from tuesday evening through wednesday
afternoon...

.early this morning...west winds 15 to 25 knots. waves 4 to
8 feet occasionally to 10 feet. 
.today...west winds 15 to 25 knots diminishing to 10 to 20 knots
by mid afternoon. waves subsiding to 2 to 4 feet. 
.tonight...southwest winds 5 to 15 knots increasing to 10 to
20 knots by midnight. a chance of rain showers, possibly mixed
with snow after midnight. waves subsiding to 1 to 3 feet, then
building to 2 to 4 feet. 
.tuesday...southwest winds 15 to 25 knots veering west. a chance
of rain showers, possibly mixed with snow. waves building to 3 to
6 feet occasionally to 8 feet. 
.tuesday night...north gales to 45 knots. heavy freezing spray.
rain showers likely in the evening. a chance of snow showers.
waves building to 11 to 15 feet occasionally to 19 feet, then
subsiding to 10 to 14 feet occasionally to 18 feet. 
.wednesday...north gales to 45 knots diminishing to 20 to
30 knots in the afternoon. heavy freezing spray. waves subsiding
to 4 to 7 feet occasionally to 9 feet. 
.wednesday night...north winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. freezing spray in the evening.
waves subsiding to 1 to 3 feet. 
.thursday...southwest winds 20 to 30 knots. a chance of snow
showers. waves subsiding to calm to 2 feet, then building to 3 to
5 feet occasionally to 7 feet. 
.friday...northwest winds 20 to 30 knots veering north. a chance
of snow showers. waves subsiding to 1 to 3 feet, then building to
3 to 5 feet occasionally to 7 feet. 

note, wave height forecasts are for ice free areas.

$$