fzus63 kmqt 060801
glfls 
expires:202609062000;;988144

open lake forecast for lake superior
national weather service marquette mi
400 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...

high pressure ridging of 30.1 inches over lake superior remains 
through sunday night. the ridge briefly builds further to 30.2 
inches on monday as a 30.4 inch high passes eastward over far 
northern ontario. meanwhile, a 29.6 inch low develops off the 
northern rockies. the low then tracks northeast to eastern hudson 
bay, deepening to 29.2 inches by wednesday afternoon. this sends a 
29.7 inch trough over lake superior tuesday night and wednesday. 
weak ridging of 29.9 inches returns to lake superior by the end of 
thursday.




lsz162-062000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sun sep 6 2026 /300 am cdt sun sep 6 2026/

.early this morning...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...east winds 5 to 15 knots backing northeast in the
afternoon. 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 calm to 2 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 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 060801
glfls 
expires:202609062000;;988145

open lake forecast for lake superior
national weather service marquette mi
400 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...

high pressure ridging of 30.1 inches over lake superior remains 
through sunday night. the ridge briefly builds further to 30.2 
inches on monday as a 30.4 inch high passes eastward over far 
northern ontario. meanwhile, a 29.6 inch low develops off the 
northern rockies. the low then tracks northeast to eastern hudson 
bay, deepening to 29.2 inches by wednesday afternoon. this sends a 
29.7 inch trough over lake superior tuesday night and wednesday. 
weak ridging of 29.9 inches returns to lake superior by the end of 
thursday.




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-
400 am edt sun sep 6 2026

.early this morning...east winds less than 10 knots. waves calm
to 2 feet. 
.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 becoming south 10 to 20 knots
late. waves calm to 2 feet. 
.monday...south winds 10 to 20 knots backing east in the
afternoon. a slight chance of showers. waves building to 2 to
4 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. 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. 

$$