fzus63 kmqt 070802
glfls 
expires:202609072000;;043829

open lake forecast for lake superior
national weather service marquette mi
401 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 the lake builds to 30.2 inches today as 
a 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.




lsz162-072000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon sep 7 2026 /301 am cdt mon sep 7 2026/

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.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 070802
glfls 
expires:202609072000;;043830

open lake forecast for lake superior
national weather service marquette mi
401 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 the lake builds to 30.2 inches today as 
a 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.




lsz263-072000-
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-
401 am edt mon sep 7 2026

.early this morning...east winds 5 to 15 knots. waves calm to
2 feet. 
.today...south winds 5 to 15 knots backing east in the afternoon.
a slight chance of showers through early afternoon. 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. 

$$