fzus63 kmqt 070801
glfls 
expires:202608072000;;758939

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri aug 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...

lake superior is currently situated between a 29.5 inch low along 
the shore of hudson bay at the manitoba/ontario line and a 30.2 inch 
bermuda high. a passing cold front brings 29.8 inch troughing across 
the lake beginning later this morning before 29.9 inch ridging 
returns late tonight into saturday. while some weak 29.8 inch 
troughing could be seen over lake superior saturday night, weak 29.9 
inch ridging settles once again over the lake sunday and monday, 
with a weak 29.8 inch trough potentially passing through sunday 
evening. the high pressure ridging could increase to 30.0 inches by 
tuesday. 




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

.early this morning...southwest winds 10 to 20 knots. waves 1 to
3 feet. 
.today...southwest winds 10 to 20 knots. a chance of showers and
a slight chance of thunderstorms. waves subsiding to calm to
2 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight, then becoming west 10 to 20 knots late.
waves calm to 2 feet. 
.saturday...west winds 10 to 20 knots backing southwest in the
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.saturday night...west winds 5 to 15 knots. a slight chance of
thunderstorms through midnight. a chance of showers. waves calm
to 2 feet. 
.sunday...west winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.sunday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.monday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$

fzus63 kmqt 070801
glfls 
expires:202608072000;;758940

open lake forecast for lake superior
national weather service marquette mi
401 am edt fri aug 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...

lake superior is currently situated between a 29.5 inch low along 
the shore of hudson bay at the manitoba/ontario line and a 30.2 inch 
bermuda high. a passing cold front brings 29.8 inch troughing across 
the lake beginning later this morning before 29.9 inch ridging 
returns late tonight into saturday. while some weak 29.8 inch 
troughing could be seen over lake superior saturday night, weak 29.9 
inch ridging settles once again over the lake sunday and monday, 
with a weak 29.8 inch trough potentially passing through sunday 
evening. the high pressure ridging could increase to 30.0 inches by 
tuesday. 




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 fri aug 7 2026

.early this morning...southwest winds 15 to 25 knots. waves 1 to
3 feet. 
.today...southwest winds 10 to 20 knots diminishing to 5 to
15 knots late. a chance of showers through early afternoon. a
chance of thunderstorms. showers likely by mid afternoon. waves
subsiding to calm to 2 feet. 
.tonight...west winds 5 to 15 knots veering northwest after
midnight, then backing west late. a slight chance of showers
through midnight. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots becoming southwest 15 to
25 knots in the afternoon. waves building to 1 to 3 feet. 
.saturday night...southwest winds 10 to 20 knots becoming west
5 to 15 knots after midnight. a chance of showers. a slight
chance of thunderstorms after midnight. waves subsiding to calm
to 2 feet. 
.sunday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.sunday night...southwest winds 5 to 15 knots becoming west less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...west winds 5 to 15 knots. waves calm to 2 feet. 
.tuesday...west winds 10 to 20 knots diminishing to 5 to
15 knots. waves calm to 2 feet. 

$$