fzus63 kmqt 130801
glfls 
expires:202607132000;;888589

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon jul 13 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... 

this morning, lake superior is between a 30.1 to 30.1 inch high over 
the south half of the great lakes and a 29.5 inch low over hudson 
bay. throughout today, the high will remain mainly steady while the 
high shifts to the eastern shores of hudson bay, deepening to 29.3 
inches. tuesday, despite a 30.1 inch high over the canadian prairie 
approaching, high pressure south of the great lakes weakens to 30.0 
inches as the hudson low shifts into northern quebec at 29.2 inches. 
wednesday afternoon, the 30.1 inch high will move fully into 
manitoba as the low weakens slightly to 29.3 inches over labrador. 
by thursday night, the high will move over the great lakes and 
northern ontario at 30.1 inches, being flanked to the east by 29.4 
inch low pressure over labrador and 29.8 inch low pressure over 
north dakota and minnesota. the low moves into the great lakes by 
friday night as high pressure shifts to the east coast at 30.0 
inches with another 30.0 inch high building over the canadian 
prairie, which will advance towards the great lakes through the 
weekend.




lsz162-132000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt mon jul 13 2026 /300 am cdt mon jul 13 2026/

.early this morning...southwest winds 10 to 20 knots. waves 1 to
3 feet. 
.today...southwest winds 15 to 25 knots increasing to 20 to
30 knots late. waves building to 3 to 6 feet occasionally to
8 feet. 
.tonight...southwest winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. waves subsiding to 2 to 4 feet. 
.tuesday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then veering west late. waves
subsiding to calm to 2 feet. 
.tuesday night...north winds 5 to 15 knots. waves calm to 2 feet.
.wednesday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots. a chance of showers.
waves calm to 2 feet. 
.friday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 130801
glfls 
expires:202607132000;;888590

open lake forecast for lake superior
national weather service marquette mi
400 am edt mon jul 13 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... 

this morning, lake superior is between a 30.1 to 30.1 inch high over 
the south half of the great lakes and a 29.5 inch low over hudson 
bay. throughout today, the high will remain mainly steady while the 
high shifts to the eastern shores of hudson bay, deepening to 29.3 
inches. tuesday, despite a 30.1 inch high over the canadian prairie 
approaching, high pressure south of the great lakes weakens to 30.0 
inches as the hudson low shifts into northern quebec at 29.2 inches. 
wednesday afternoon, the 30.1 inch high will move fully into 
manitoba as the low weakens slightly to 29.3 inches over labrador. 
by thursday night, the high will move over the great lakes and 
northern ontario at 30.1 inches, being flanked to the east by 29.4 
inch low pressure over labrador and 29.8 inch low pressure over 
north dakota and minnesota. the low moves into the great lakes by 
friday night as high pressure shifts to the east coast at 30.0 
inches with another 30.0 inch high building over the canadian 
prairie, which will advance towards the great lakes through the 
weekend.




lsz263-132000-
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 mon jul 13 2026

.early this morning...southwest winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.today...southwest winds 15 to 25 knots increasing to 20 to
30 knots late. waves building to 5 to 8 feet occasionally to
10 feet. 
.tonight...southwest winds 20 to 30 knots becoming west 15 to
25 knots late. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.tuesday...west winds 10 to 20 knots diminishing to 5 to 15 knots
in the afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.wednesday...northwest winds less than 10 knots becoming
southwest 5 to 15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...west winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east. a chance
of showers. waves calm to 2 feet. 
.friday...east winds 5 to 15 knots backing northeast. a chance of
showers. waves calm to 2 feet. 

$$