fzus63 kmqt 062001
glfls 
expires:202609070800;;016568

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun sep 6 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 persists over lake superior through tonight 
and then briefly builds to 30.2 inches on monday as 30.4 inch high 
pressure 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 29.2 inches by wednesday 
afternoon. this sends a 29.6 to 29.7 inch trough over lake superior 
tuesday night and wednesday. weak ridging of 29.9 inches returns 
over the lake on thursday, followed by another trough ranging from 
29.5 to 29.7 inches on friday.




lsz162-070800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt sun sep 6 2026 /301 pm cdt sun sep 6 2026/

.late this afternoon...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots increasing to 15 to 25 knots
late. a slight chance of showers. waves building to 1 to 3 feet. 
.monday night...east winds 15 to 25 knots veering southeast after
midnight, then becoming south 20 to 30 knots late. a chance of
showers through midnight, then showers and a slight chance of
thunderstorms after midnight. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.tuesday...south winds 20 to 30 knots. showers likely and a
slight chance of thunderstorms through early afternoon. waves
subsiding to 2 to 4 feet. 
.tuesday night...southwest winds 20 to 30 knots. waves building
to 3 to 6 feet occasionally to 8 feet. 
.wednesday...west gales to 40 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 winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots. waves calm to 2 feet.
.friday...southwest winds 20 to 30 knots becoming west 15 to
25 knots. waves building to 2 to 4 feet, then subsiding to 1 to
3 feet. 

$$

fzus63 kmqt 062001
glfls 
expires:202609070800;;016569

open lake forecast for lake superior
national weather service marquette mi
401 pm edt sun sep 6 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 persists over lake superior through tonight 
and then briefly builds to 30.2 inches on monday as 30.4 inch high 
pressure 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 29.2 inches by wednesday 
afternoon. this sends a 29.6 to 29.7 inch trough over lake superior 
tuesday night and wednesday. weak ridging of 29.9 inches returns 
over the lake on thursday, followed by another trough ranging from 
29.5 to 29.7 inches on friday.




lsz263-070800-
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-
401 pm edt sun sep 6 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots. waves calm to 2 feet. 
.monday...east winds 5 to 15 knots increasing to 10 to 20 knots
late. a slight chance of showers through early afternoon. waves
building to 1 to 3 feet. 
.monday night...east winds 10 to 20 knots becoming southeast
20 to 30 knots after midnight, then becoming south to 30 knots
with a few gale force gusts to 35 knots possible late. a chance
of showers through midnight, then showers and a slight chance of
thunderstorms after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...south gales to 35 knots. showers through early
afternoon. a slight chance of thunderstorms. 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 5 to 8 feet
occasionally to 10 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 southwest 15 to
25 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.friday...southwest gales to 35 knots becoming west 20 to
30 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet. 

$$