fzus63 kmqt 250201
glfls 
expires:202607250800;;550354

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri jul 24 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... 

29.8 inch troughing moves over lake superior tonight as a parent 
29.3 inch low tracks across hudson bay. pressure holds at around 
29.8 inches over the lake through early sunday. a 29.6 to 29.7 inch 
clipper low moves into the upper great lakes or upper midwest by 
monday before departing east towards the st. lawrence seaway at 29.4 
inches on tuesday. behind the clipper, weak ridging of 29.9 to 30.0 
inches returns to lake superior tuesday into wednesday.




lsz162-250800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt fri jul 24 2026 /901 pm cdt fri jul 24 2026/

.rest of tonight...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight, then diminishing to 15 to 25 knots
late. a chance of showers and thunderstorms. waves 1 to 3 feet
building to 3 to 5 feet occasionally to 7 feet. 
.saturday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. waves subsiding to calm to 2 feet. 
.saturday night...southwest winds 5 to 15 knots backing south
after midnight, then backing east late. a slight chance of
showers and thunderstorms after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots backing northeast by mid
afternoon. a slight chance of showers and thunderstorms. waves
calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. a chance of
showers and a slight chance of thunderstorms. waves calm to
2 feet. 
.monday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday...east winds 5 to 15 knots backing northeast. waves
calm to 2 feet. 

$$

fzus63 kmqt 250201
glfls 
expires:202607250800;;550355

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt fri jul 24 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... 

29.8 inch troughing moves over lake superior tonight as a parent 
29.3 inch low tracks across hudson bay. pressure holds at around 
29.8 inches over the lake through early sunday. a 29.6 to 29.7 inch 
clipper low moves into the upper great lakes or upper midwest by 
monday before departing east towards the st. lawrence seaway at 29.4 
inches on tuesday. behind the clipper, weak ridging of 29.9 to 30.0 
inches returns to lake superior tuesday into wednesday.




lsz263-250800-
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 pm edt fri jul 24 2026

.rest of tonight...southwest winds 20 to 30 knots. a chance of
showers and thunderstorms. waves 2 to 4 feet building to 3 to
6 feet occasionally to 8 feet. 
.saturday...southwest winds 15 to 25 knots becoming west 10 to
20 knots in the afternoon, then becoming southwest 5 to 15 knots
late. a slight chance of showers through early afternoon. waves
subsiding to calm to 2 feet. 
.saturday night...southwest winds 5 to 15 knots becoming south
less than 10 knots after midnight, then backing southeast late. a
slight chance of showers and thunderstorms after midnight. waves
calm to 2 feet. 
.sunday...east winds less than 10 knots becoming northeast 5 to
15 knots by mid afternoon. a chance of showers and a slight
chance of thunderstorms through early afternoon. waves calm to
2 feet. 
.sunday night...east winds 5 to 15 knots backing northeast after
midnight. a chance of showers and a slight chance of
thunderstorms. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots. a chance of showers and
thunderstorms. waves calm to 2 feet. 
.monday night...north winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots diminishing to less than
10 knots. waves calm to 2 feet. 
.wednesday...northeast winds less than 10 knots veering east.
waves calm to 2 feet. 

$$