fzus63 kmqt 302001
glfls 
expires:202610310800;;984481

open lake forecast for lake superior
national weather service marquette mi
400 pm edt fri oct 30 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 30.3 inch high pressure over the upper great lakes will slowly 
shift east through saturday and build to 30.4 inches. this will keep 
ridging of 30.2 inches over the lake through sunday. the ridge will 
weaken to 30.0 inches as the high moves to the eastern seaboard on 
monday. a 29.6 inch colorado low develops on monday and moves into 
minnesota by tuesday morning. this low passes north of lake superior 
into northern ontario tuesday night at 29.5 inches, dragging 
troughing of at least 29.6 inches over the western half of the lake 
tuesday into wednesday.




lsz162-310800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt fri oct 30 2026 /300 pm cdt fri oct 30 2026/

.late this afternoon...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...southwest winds 5 to 15 knots becoming south less than
10 knots after midnight. waves calm to 2 feet. 
.saturday...southeast winds less than 10 knots becoming east 5 to
15 knots in the afternoon. a slight chance of showers by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots becoming northeast
less than 10 knots after midnight, then veering south late. a
chance of showers. waves calm to 2 feet. 
.sunday...southwest winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...south winds less than 10 knots backing east after
midnight. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. a chance of showers through early afternoon,
then showers likely by mid afternoon. waves calm to 2 feet. 
.monday night...east winds 10 to 20 knots increasing to 15 to
25 knots after midnight. showers. waves building to 2 to 4 feet. 
.tuesday...east winds 15 to 25 knots becoming west 10 to
20 knots. showers, then a chance of showers. waves subsiding to
calm to 2 feet. 
.wednesday...west winds 10 to 20 knots becoming northwest 15 to
25 knots. a chance of showers. waves building to 1 to 3 feet. 

$$

fzus63 kmqt 302001
glfls 
expires:202610310800;;984482

open lake forecast for lake superior
national weather service marquette mi
400 pm edt fri oct 30 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 30.3 inch high pressure over the upper great lakes will slowly 
shift east through saturday and build to 30.4 inches. this will keep 
ridging of 30.2 inches over the lake through sunday. the ridge will 
weaken to 30.0 inches as the high moves to the eastern seaboard on 
monday. a 29.6 inch colorado low develops on monday and moves into 
minnesota by tuesday morning. this low passes north of lake superior 
into northern ontario tuesday night at 29.5 inches, dragging 
troughing of at least 29.6 inches over the western half of the lake 
tuesday into wednesday.




lsz263-310800-
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 fri oct 30 2026

.late this afternoon...west winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots becoming southwest less than
10 knots after midnight, then backing south late. waves calm to
2 feet. 
.saturday...south winds less than 10 knots backing east late.
waves calm to 2 feet. 
.saturday night...southeast winds 5 to 15 knots veering south
after midnight. a chance of showers. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.sunday night...south winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...southeast winds 5 to 15 knots. a chance of showers by
mid afternoon. waves calm to 2 feet. 
.monday night...southeast winds 5 to 15 knots becoming east 10 to
20 knots after midnight. showers. waves building to 2 to 4 feet. 
.tuesday...east winds 15 to 25 knots becoming west 10 to
20 knots. showers, then a chance of showers. waves subsiding to
1 to 3 feet. 
.wednesday...west winds 10 to 20 knots becoming northwest 15 to
25 knots. a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$