fzus63 kmqt 231401
glfls 
expires:202607232000;;467376

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu jul 23 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... 

weak ridging of around 30.0 inches over lake superior this morning 
will be replaced by weak 29.9 inch troughing over the northwest half 
of the lake this evening into friday. expect troughing to deepen to 
29.8 inches through saturday as a 29.3 inch low tracks across hudson 
bay friday night. weak ridging of 29.8 to 29.9 inches develops over 
the lake saturday night. a 29.5 inch clipper low moves into the 
upper great lakes or upper midwest by monday. 




lsz162-232000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt thu jul 23 2026 /901 am cdt thu jul 23 2026/

.rest of today...southwest winds 15 to 25 knots. waves 2 to
4 feet building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.tonight...southwest winds 10 to 20 knots increasing to 15 to
25 knots after midnight, then diminishing to 10 to 20 knots late.
waves subsiding to 1 to 3 feet. 
.friday...southwest winds 10 to 20 knots backing south late.
waves subsiding to calm to 2 feet. 
.friday night...southwest winds 15 to 25 knots. a slight chance
of showers through midnight. a chance of thunderstorms. showers
after midnight. waves building to 3 to 5 feet occasionally to
7 feet. 
.saturday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots by mid afternoon. a slight chance of showers and
thunderstorms through early afternoon. waves subsiding to calm to
2 feet. 
.saturday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...east winds 5 to 15 knots backing northeast. a chance of
showers. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 231401
glfls 
expires:202607232000;;467377

open lake forecast for lake superior
national weather service marquette mi
1001 am edt thu jul 23 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... 

weak ridging of around 30.0 inches over lake superior this morning 
will be replaced by weak 29.9 inch troughing over the northwest half 
of the lake this evening into friday. expect troughing to deepen to 
29.8 inches through saturday as a 29.3 inch low tracks across hudson 
bay friday night. weak ridging of 29.8 to 29.9 inches develops over 
the lake saturday night. a 29.5 inch clipper low moves into the 
upper great lakes or upper midwest by monday. 




lsz263-232000-
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-
1001 am edt thu jul 23 2026

.rest of today...southwest winds 15 to 25 knots. waves 3 to
6 feet occasionally to 8 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tonight...southwest winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet, then building to
2 to 4 feet. 
.friday...southwest winds 15 to 25 knots backing south late.
waves subsiding to 1 to 3 feet. 
.friday night...south winds 15 to 25 knots veering southwest
after midnight. a slight chance of showers through midnight, then
showers and a chance of thunderstorms after midnight. waves
building to 3 to 6 feet occasionally to 8 feet. 
.saturday...southwest winds 15 to 25 knots diminishing to 5 to
15 knots by mid afternoon. a slight chance of showers and
thunderstorms through early afternoon. waves subsiding to calm to
2 feet. 
.saturday night...east winds 5 to 15 knots becoming northeast
less than 10 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots. a chance of showers. waves
calm to 2 feet. 
.monday...northeast winds 5 to 15 knots backing north. waves calm
to 2 feet. 

$$