fzus63 kmqt 230803 cca
glfls 
expires:202607232000;;454678

open lake forecast for lake superior...corrected
national weather service marquette mi
403 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... 

while ridging averaging around 30.0 inches looks to remain over lake 
superior today, a weak 29.9 to 30.0 inch low is looking to move over 
the northwestern half of the lake tonight. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning; troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, 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-
403 am edt thu jul 23 2026 /303 am cdt thu jul 23 2026/

.early this morning...southwest winds 15 to 25 knots. waves calm
to 2 feet. 
.today...southwest winds 15 to 25 knots. waves 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. 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 230803 cca
glfls 
expires:202607232000;;454679

open lake forecast for lake superior...corrected
national weather service marquette mi
403 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... 

while ridging averaging around 30.0 inches looks to remain over lake 
superior today, a weak 29.9 to 30.0 inch low is looking to move over 
the northwestern half of the lake tonight. as a low around 29.3 
inches lifts from far northern ontario into hudson bay friday night 
into saturday morning, expect troughing of around 29.8 inches to 
move into lake superior in response by saturday morning; troughing 
of at least 29.8 inches looks to remain over the lake for the rest 
of the day. while weak ridging of 29.8 to 29.9 inches develops over 
lake superior sunday morning, 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-
403 am edt thu jul 23 2026

.early this morning...west winds 10 to 20 knots. waves 2 to
4 feet. 
.today...southwest winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 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. 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. 

$$