fzus63 kmqt 222001
glfls 
expires:202607230800;;426509

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed jul 22 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 30.1 inch high pressure will continue to move through the midwest 
through early friday morning. while ridging of around 30.0 inches 
looks to remain over lake superior on thursday, a weak 29.9 to 30.0 
inch low could move over the northwestern half of the lake by 
thursday night into friday morning. 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 29.6 inch low moving in from the west 
moves over the upper great lakes by monday morning. 




lsz162-230800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt wed jul 22 2026 /300 pm cdt wed jul 22 2026/

.late this afternoon...southwest winds 15 to 25 knots. waves 1 to
3 feet building to 2 to 4 feet. 
.tonight...southwest winds 10 to 20 knots veering west after
midnight, then backing southwest late. waves subsiding to calm to
2 feet. 
.thursday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.thursday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots late. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.friday...southwest winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.friday night...southwest winds 20 to 30 knots. a chance of
thunderstorms. showers after midnight. waves building to 3 to
6 feet occasionally to 8 feet. 
.saturday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.saturday night...north winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 
.monday...north winds 5 to 15 knots veering northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 222001
glfls 
expires:202607230800;;426510

open lake forecast for lake superior
national weather service marquette mi
400 pm edt wed jul 22 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 30.1 inch high pressure will continue to move through the midwest 
through early friday morning. while ridging of around 30.0 inches 
looks to remain over lake superior on thursday, a weak 29.9 to 30.0 
inch low could move over the northwestern half of the lake by 
thursday night into friday morning. 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 29.6 inch low moving in from the west 
moves over the upper great lakes by monday morning. 




lsz263-230800-
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 edt wed jul 22 2026

.late this afternoon...southwest winds 15 to 25 knots. waves 1 to
3 feet building to 2 to 4 feet. 
.tonight...southwest winds 15 to 25 knots becoming west 10 to
20 knots after midnight, then increasing to 15 to 25 knots late.
waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.thursday...southwest winds 15 to 25 knots. a slight chance of
showers and thunderstorms by mid afternoon. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.thursday night...southwest winds 10 to 20 knots increasing to
15 to 25 knots after midnight. a slight chance of showers through
midnight. waves subsiding to 1 to 3 feet, then building to 2 to
4 feet. 
.friday...southwest winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.friday night...southwest winds 20 to 30 knots. showers after
midnight. waves subsiding to 2 to 4 feet, then building to 4 to
7 feet occasionally to 9 feet. 
.saturday...southwest winds 20 to 30 knots becoming west 10 to
20 knots by mid afternoon. a chance of showers through early
afternoon. waves subsiding to 1 to 3 feet. 
.saturday night...northeast winds 5 to 15 knots. waves subsiding
to 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. 

$$