fzus63 kmqt 061401
glfls 
expires:202609062000;;001247

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 passes eastward over 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.




lsz162-062000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt sun sep 6 2026 /900 am cdt sun sep 6 2026/

.rest of today...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots backing northeast after
midnight, then veering east late. a slight chance of showers
after midnight. 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 becoming south gales to
35 knots after midnight. a chance of showers through midnight. a
chance of thunderstorms. showers after midnight. waves building
to 3 to 6 feet occasionally to 8 feet. 
.tuesday...south gales to 35 knots diminishing to 20 to 30 knots
by mid afternoon. 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 becoming west
gales to 35 knots after midnight. waves building to 3 to 6 feet
occasionally to 8 feet. 
.wednesday...west gales to 40 knots diminishing to 20 to
30 knots. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to calm to 2 feet. 
.thursday...southwest winds 10 to 20 knots. waves calm to 2 feet.

$$

fzus63 kmqt 061401
glfls 
expires:202609062000;;001248

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 passes eastward over 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.




lsz263-062000-
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-
1000 am edt sun sep 6 2026

.rest of today...east winds less than 10 knots increasing to 5 to
15 knots late. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots veering south late. waves
calm to 2 feet. 
.monday...south winds 5 to 15 knots backing east in the
afternoon, then increasing to 10 to 20 knots late. a slight
chance of showers. waves building to 1 to 3 feet. 
.monday night...east winds 15 to 25 knots becoming south gales to
35 knots after midnight. 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 diminishing to 20 to 30 knots
by mid afternoon. 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 2 to 4 feet. 
.tuesday night...southwest gales to 35 knots veering west after
midnight. waves building to 5 to 8 feet occasionally to 10 feet. 
.wednesday...west gales to 45 knots. waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to 2 to 4 feet. 
.thursday...west winds 10 to 20 knots backing southwest. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 

$$