fzus63 kmqt 071401
glfls 
expires:202609072000;;057006

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon sep 7 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...

ridging of 30.1 inches over lake superior builds to 30.2 inches 
today as a 30.4 inch high crosses far northern ontario. meanwhile, a 
29.6 inch low develops off the northern rockies by monday morning 
and then tracks northeast to hudson bay, deepening to 29.1 inches by 
wednesday afternoon. this sends a 29.7 inch trough over the lake 
tuesday night and wednesday. ridging of 30.0 inches returns on 
thursday, followed by another trough of around 29.7 inches on friday.




lsz162-072000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt mon sep 7 2026 /901 am cdt mon sep 7 2026/

.rest of today...east winds 5 to 15 knots increasing to 10 to
20 knots late. a slight chance of showers by mid afternoon. waves
calm to 2 feet. 
.tonight...east winds 10 to 20 knots becoming south 15 to
25 knots after midnight, then increasing to 20 to 30 knots late.
a chance of showers through midnight, then showers likely and a
slight chance of thunderstorms after midnight. waves building to
3 to 5 feet occasionally to 7 feet. 
.tuesday...south winds to 30 knots with a few gale force gusts to
35 knots possible becoming southwest 20 to 30 knots in the
afternoon, then diminishing to 15 to 25 knots late. a slight
chance of thunderstorms through early afternoon. a chance of
showers. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet. 
.tuesday night...southwest winds 20 to 30 knots. a slight chance
of showers through midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.wednesday...west gales to 35 knots. waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.wednesday night...west gales to 35 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots increasing to 15 to
25 knots. waves building to 1 to 3 feet. 
.friday...southwest winds 20 to 30 knots becoming west 15 to
25 knots. a chance of showers. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 1 to 3 feet. 

$$

fzus63 kmqt 071401
glfls 
expires:202609072000;;057007

open lake forecast for lake superior
national weather service marquette mi
1001 am edt mon sep 7 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...

ridging of 30.1 inches over lake superior builds to 30.2 inches 
today as a 30.4 inch high crosses far northern ontario. meanwhile, a 
29.6 inch low develops off the northern rockies by monday morning 
and then tracks northeast to hudson bay, deepening to 29.1 inches by 
wednesday afternoon. this sends a 29.7 inch trough over the lake 
tuesday night and wednesday. ridging of 30.0 inches returns on 
thursday, followed by another trough of around 29.7 inches on friday.




lsz263-072000-
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 mon sep 7 2026

.rest of today...south winds 5 to 15 knots backing east in the
afternoon. a slight chance of showers by late morning. waves calm
to 2 feet. 
.tonight...east winds 10 to 20 knots becoming south 15 to
25 knots after midnight, then increasing to 30 knots with a few
gale force gusts to 35 knots possible late. a chance of showers.
a slight chance of thunderstorms after midnight. waves building
to 3 to 6 feet occasionally to 8 feet. 
.tuesday...south winds to 30 knots with a few gale force gusts to
35 knots possible becoming southwest 20 to 30 knots late. showers
and a slight chance of thunderstorms through early afternoon,
then a slight chance of showers by mid afternoon. waves building
to 4 to 7 feet occasionally to 9 feet, then subsiding to 3 to
5 feet occasionally to 7 feet. 
.tuesday night...southwest winds 20 to 30 knots increasing to
gales to 35 knots after midnight. waves building to 4 to 7 feet
occasionally to 9 feet. 
.wednesday...west gales to 45 knots. waves building to 7 to
11 feet occasionally to 14 feet. 
.wednesday night...west gales to 40 knots becoming northwest
20 to 30 knots after midnight. waves subsiding to 2 to 4 feet. 
.thursday...west winds 10 to 20 knots becoming south 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
2 to 4 feet. 
.friday...southwest gales to 35 knots becoming west 20 to
30 knots. a chance of showers. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 2 to 4 feet. 

$$