fzus63 kmqt 131401
glfls 
expires:202607132000;;900789

open lake forecast for lake superior
national weather service marquette mi
1000 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 30.2 inch high over 
the midwest and the southern half of the great lakes and a 29.5 inch 
low entering hudson bay. the high will remain steady today while the 
low shifts to the eastern shores of hudson bay, deepening to 29.3 
inches tonight. tuesday, despite a 30.1 inch high approaching from 
the canadian prairie, 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-
1000 am edt mon jul 13 2026 /900 am cdt mon jul 13 2026/

.rest of today...southwest winds 15 to 25 knots increasing to
20 to 30 knots late. waves 1 to 3 feet building to 2 to 4 feet. 
.tonight...southwest winds 20 to 30 knots diminishing to 15 to
25 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet, then 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 131401
glfls 
expires:202607132000;;900790

open lake forecast for lake superior
national weather service marquette mi
1000 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 30.2 inch high over 
the midwest and the southern half of the great lakes and a 29.5 inch 
low entering hudson bay. the high will remain steady today while the 
low shifts to the eastern shores of hudson bay, deepening to 29.3 
inches tonight. tuesday, despite a 30.1 inch high approaching from 
the canadian prairie, 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-
1000 am edt mon jul 13 2026

.rest of today...southwest winds 15 to 25 knots increasing to
20 to 30 knots late. waves 2 to 4 feet building to 3 to 5 feet
occasionally to 7 feet. 
.tonight...southwest winds 20 to 30 knots becoming west 15 to
25 knots late. waves building 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 calm to 2 feet. 
.tuesday night...northwest winds 5 to 15 knots. waves 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. 

$$