fzus63 kmqt 091401
glfls 
expires:202609092000;;166751

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed sep 9 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 29.4 inch low near hudson bay continues to deepen to around 29.1 
inches by this afternoon, then moves into northern quebec by early 
thursday. an associated cold front moves through today, shifting 
winds over to the west with widespread gales through the daytime 
hours. ridging to 30.0 inches and subsequent calmer conditions 
follow from early thursday morning until friday morning, when a 
trough averaging 29.5 inches tracks from the great plains north 
toward hudson bay. a cold front passes through on saturday with. 
ridging in its wake reaching 30.0 inches by sunday.




lsz162-092000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt wed sep 9 2026 /901 am cdt wed sep 9 2026/

...gale warning in effect until 6 pm edt /5 pm cdt/ this
evening...

.rest of today...west gales to 35 knots diminishing to 20 to
30 knots late. waves 3 to 6 feet occasionally to 8 feet building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
5 feet occasionally to 7 feet. 
.tonight...west winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to calm to 2 feet. 
.thursday...west winds 5 to 15 knots backing south late. waves
calm to 2 feet. 
.thursday night...south winds 5 to 15 knots increasing to 15 to
25 knots after midnight. waves building to 1 to 3 feet. 
.friday...southwest winds 20 to 30 knots backing south by mid
afternoon. a chance of showers and a slight chance of
thunderstorms by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.friday night...south winds 20 to 30 knots becoming west 15 to
25 knots after midnight. showers and a chance of thunderstorms.
waves building to 3 to 5 feet occasionally to 7 feet, then
subsiding to 2 to 4 feet. 
.saturday...west winds 15 to 25 knots. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 
.sunday...northwest winds 5 to 15 knots becoming northeast gales
to 35 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$

fzus63 kmqt 091401
glfls 
expires:202609092000;;166752

open lake forecast for lake superior
national weather service marquette mi
1001 am edt wed sep 9 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 29.4 inch low near hudson bay continues to deepen to around 29.1 
inches by this afternoon, then moves into northern quebec by early 
thursday. an associated cold front moves through today, shifting 
winds over to the west with widespread gales through the daytime 
hours. ridging to 30.0 inches and subsequent calmer conditions 
follow from early thursday morning until friday morning, when a 
trough averaging 29.5 inches tracks from the great plains north 
toward hudson bay. a cold front passes through on saturday with. 
ridging in its wake reaching 30.0 inches by sunday.




lsz263-092000-
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 am edt wed sep 9 2026

...gale warning in effect until 10 pm edt this evening...

.rest of today...west gales to 40 knots. waves 6 to 9 feet
occasionally to 11 feet building to 8 to 11 feet occasionally to
14 feet, then subsiding to 6 to 9 feet occasionally to 11 feet. 
.tonight...west gales to 35 knots becoming northwest 20 to
30 knots after midnight, then diminishing to 10 to 20 knots late.
waves subsiding to 1 to 3 feet. 
.thursday...northwest winds 5 to 15 knots becoming southwest
10 to 20 knots in the afternoon. waves subsiding to calm to
2 feet. 
.thursday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 2 to 4 feet. 
.friday...south gales to 35 knots. a slight chance of showers by
mid afternoon. waves building to 3 to 6 feet occasionally to
8 feet, then subsiding to 2 to 4 feet. 
.friday night...south winds 20 to 30 knots veering southwest
after midnight. showers and a chance of thunderstorms. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 
.saturday...west winds 20 to 30 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.sunday...northwest winds 10 to 20 knots becoming east 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 

$$