fzus63 kmqt 060202
glfls 
expires:202610060800;;602900

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon oct 5 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...

30.2 inch high pressure will shift east to the lower great lakes 
tonight. behind this, a 29.5 inch low drops southeast out of 
northern canada, reaching far northern ontario at 29.4 inches by 
tomorrow evening. this brings 29.6 inch troughing over lake superior 
late tomorrow, weakening to 29.7 inches through wednesday. high 
pressure builds back in from the canadian prairies and northern 
plains late in the week, resulting in 30.1 to 30.2 inch ridging over 
lake superior late thursday into friday. a 29.4 inch low will 
develop off the northern rockies late friday and extend a 29.7 to 
29.9 inch trough to the upper great lakes by saturday night.




lsz162-060800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt mon oct 5 2026 /901 pm cdt mon oct 5 2026/

.rest of tonight...southeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight, then becoming south 10 to 20 knots
late. a chance of showers. waves calm to 2 feet building to 1 to
3 feet. 
.tuesday...south winds 10 to 20 knots becoming southwest 15 to
25 knots in the afternoon, then veering west late. waves 1 to
3 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...west winds 10 to 20 knots increasing to 20 to
30 knots by mid afternoon. waves building to 1 to 3 feet. 
.wednesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...west winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.thursday night...west winds 10 to 20 knots. waves calm to
2 feet. 
.friday...west winds 5 to 15 knots becoming southeast 10 to
20 knots. waves building to 1 to 3 feet. 
.saturday...southeast winds 20 to 30 knots veering southwest.
waves building to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 060202
glfls 
expires:202610060800;;602901

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon oct 5 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...

30.2 inch high pressure will shift east to the lower great lakes 
tonight. behind this, a 29.5 inch low drops southeast out of 
northern canada, reaching far northern ontario at 29.4 inches by 
tomorrow evening. this brings 29.6 inch troughing over lake superior 
late tomorrow, weakening to 29.7 inches through wednesday. high 
pressure builds back in from the canadian prairies and northern 
plains late in the week, resulting in 30.1 to 30.2 inch ridging over 
lake superior late thursday into friday. a 29.4 inch low will 
develop off the northern rockies late friday and extend a 29.7 to 
29.9 inch trough to the upper great lakes by saturday night.




lsz263-060800-
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 mon oct 5 2026

.rest of tonight...southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight, then becoming south 15 to 25 knots
late. a chance of showers. waves calm to 2 feet building to 2 to
4 feet. 
.tuesday...south winds 15 to 25 knots becoming southwest 20 to
30 knots in the afternoon, then becoming west 15 to 25 knots
late. waves subsiding to 1 to 3 feet. 
.tuesday night...west winds 15 to 25 knots diminishing to 10 to
20 knots late. waves building to 2 to 4 feet. 
.wednesday...west winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. a slight chance of showers by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet. 
.wednesday night...west winds 15 to 25 knots. a slight chance of
showers through midnight. waves 3 to 5 feet occasionally to
7 feet. 
.thursday...west winds 15 to 25 knots. waves building to 3 to
6 feet occasionally to 8 feet, then subsiding to 2 to 4 feet. 
.thursday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots becoming southeast 10 to
20 knots. waves building to 1 to 3 feet. 
.saturday...southeast winds 20 to 30 knots veering southwest.
waves building to 3 to 6 feet occasionally to 8 feet. 

$$