fzus63 kmqt 232001
glfls 
expires:202607240800;;482478

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 29.9 inch troughing will move over the northwest half of lake 
superior this evening into friday as 30.1 inch high pressure over 
lower michigan shifts east towards lake ontario. expect troughing to 
deepen to 29.8 inches over the lake through saturday as a 29.3 inch 
low tracks across hudson bay friday night. weak ridging of around 
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. 




lsz162-240800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt thu jul 23 2026 /301 pm cdt thu jul 23 2026/

.late this afternoon...southwest winds 15 to 25 knots. waves 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. 
.friday...southwest winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.friday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of showers and
thunderstorms. waves building to 3 to 5 feet occasionally to
7 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...west winds 5 to 15 knots veering northeast
after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots backing northeast by mid
afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots. a chance of
showers and thunderstorms. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots backing north. waves calm
to 2 feet. 
.tuesday...east winds 5 to 15 knots backing northeast. waves calm
to 2 feet. 

$$

fzus63 kmqt 232001
glfls 
expires:202607240800;;482479

open lake forecast for lake superior
national weather service marquette mi
401 pm 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 29.9 inch troughing will move over the northwest half of lake 
superior this evening into friday as 30.1 inch high pressure over 
lower michigan shifts east towards lake ontario. expect troughing to 
deepen to 29.8 inches over the lake through saturday as a 29.3 inch 
low tracks across hudson bay friday night. weak ridging of around 
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. 




lsz263-240800-
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 pm edt thu jul 23 2026

.late this afternoon...southwest winds 20 to 30 knots. waves 3 to
6 feet occasionally to 8 feet. 
.tonight...southwest winds 15 to 25 knots. waves subsiding to
2 to 4 feet. 
.friday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. a chance of showers. a chance of thunderstorms
after midnight. waves building to 3 to 6 feet occasionally to
8 feet. 
.saturday...southwest winds 20 to 30 knots diminishing to 10 to
20 knots by mid afternoon. a slight chance of showers and
thunderstorms through early afternoon. waves subsiding to calm to
2 feet. 
.saturday night...southwest winds 5 to 15 knots backing northeast
after midnight. waves calm to 2 feet. 
.sunday...east winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...east winds 5 to 15 knots backing northeast after
midnight. a chance of showers and thunderstorms. waves calm to
2 feet. 
.monday...northeast winds 5 to 15 knots backing north. waves calm
to 2 feet. 
.tuesday...north winds 5 to 15 knots becoming east less than
10 knots. waves calm to 2 feet. 

$$