fzus63 kmqt 010201
glfls 
expires:202610010800;;330458

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed sep 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...

29.8 inch troughing lingers over the lake through tomorrow morning 
between a 29.0 inch hudson bay low and another 29.7 inch low over 
the south plains. high pressure builds to 30.2 inches over the 
northern plains tomorrow night into friday before shifting east to 
the great lakes friday night and saturday. a weak 29.9 inch trough 
crosses lake superior saturday night and sunday with 30.3 inch high 
pressure quickly returning sunday night into monday. 




lsz162-010800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt wed sep 30 2026 /901 pm cdt wed sep 30 2026/

.rest of tonight...west winds 5 to 15 knots becoming northwest
10 to 20 knots late. waves calm to 2 feet. 
.thursday...northwest winds 10 to 20 knots backing west in the
afternoon, then increasing to 15 to 25 knots late. waves calm to
2 feet. 
.thursday night...northwest winds 15 to 25 knots. waves building
to 1 to 3 feet. 
.friday...northwest winds 10 to 20 knots becoming west 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.friday night...west winds 5 to 15 knots backing southwest after
midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots increasing to 10 to
20 knots by mid afternoon. a chance of showers. waves calm to
2 feet. 
.saturday night...southwest winds 15 to 25 knots veering west
after midnight. a chance of showers through midnight. waves
building to 1 to 3 feet. 
.sunday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.monday...northwest winds 5 to 15 knots becoming south 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 010201
glfls 
expires:202610010800;;330459

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt wed sep 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...

29.8 inch troughing lingers over the lake through tomorrow morning 
between a 29.0 inch hudson bay low and another 29.7 inch low over 
the south plains. high pressure builds to 30.2 inches over the 
northern plains tomorrow night into friday before shifting east to 
the great lakes friday night and saturday. a weak 29.9 inch trough 
crosses lake superior saturday night and sunday with 30.3 inch high 
pressure quickly returning sunday night into monday. 




lsz263-010800-
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 wed sep 30 2026

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

$$