fzus63 kmqt 090801
glfls 
expires:202607092000;;664941

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu jul 9 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... 

a 29.9 inch trough is analyzed over the lake this morning, extending 
from low pressure currently moving into quebec. weak high pressure 
then builds to 30.0 inches over lake superior and northern ontario 
today and friday. saturday, the high builds to 30.1 inches as it 
shifts toward southern ontario. the high continues to shift south 
sunday, reaching the lower great lakes at 30.2 inches before 
weakening to 30.1 inches again monday south of the great lakes. 
another strong low of 29.3 inches looks to cross into hudson bay 
early next week.




lsz162-092000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt thu jul 9 2026 /301 am cdt thu jul 9 2026/

...dense fog advisory in effect until 8 am edt /7 am cdt/ this
morning...

.early this morning...north winds less than 10 knots. patchy
dense fog. waves calm to 2 feet. 
.today...east winds less than 10 knots becoming north 5 to
15 knots in the afternoon, then diminishing to less than 10 knots
late. patchy dense fog through early afternoon. waves calm to
2 feet. 
.tonight...north winds less than 10 knots. waves calm to 2 feet. 
.friday...north winds less than 10 knots becoming east 5 to
15 knots in the afternoon, then backing northeast late. a slight
chance of showers by mid afternoon. waves calm to 2 feet. 
.friday night...northeast winds 5 to 15 knots diminishing to less
than 10 knots after midnight. a slight chance of showers and
thunderstorms. waves calm to 2 feet. 
.saturday...east winds less than 10 knots becoming north 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...northeast winds less than 10 knots backing
north after midnight. waves calm to 2 feet. 
.sunday...southwest winds 5 to 15 knots increasing to 10 to
20 knots. waves building to 1 to 3 feet. 
.monday...southwest winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 

$$

fzus63 kmqt 090801
glfls 
expires:202607092000;;664942

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu jul 9 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... 

a 29.9 inch trough is analyzed over the lake this morning, extending 
from low pressure currently moving into quebec. weak high pressure 
then builds to 30.0 inches over lake superior and northern ontario 
today and friday. saturday, the high builds to 30.1 inches as it 
shifts toward southern ontario. the high continues to shift south 
sunday, reaching the lower great lakes at 30.2 inches before 
weakening to 30.1 inches again monday south of the great lakes. 
another strong low of 29.3 inches looks to cross into hudson bay 
early next week.




lsz263-092000-
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 thu jul 9 2026

...dense fog advisory in effect until 8 am edt this morning...

.early this morning...west winds less than 10 knots. patchy dense
fog. waves calm to 2 feet. 
.today...east winds less than 10 knots backing north in the
afternoon, then becoming northeast 5 to 15 knots late. patchy
dense fog through early afternoon. waves calm to 2 feet. 
.tonight...west winds less than 10 knots backing southwest after
midnight. waves calm to 2 feet. 
.friday...east winds less than 10 knots backing northeast in the
afternoon, then becoming east 5 to 15 knots late. waves calm to
2 feet. 
.friday night...east winds 5 to 15 knots backing northeast after
midnight. a slight chance of showers and thunderstorms. waves
calm to 2 feet. 
.saturday...south winds less than 10 knots backing east by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds less than 10 knots becoming
southwest 5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...southwest winds 10 to 20 knots. waves building to 2 to
4 feet. 
.monday...southwest winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet. 

$$