fzus63 kmqt 161958
glfls 
expires:202609170800;;562609

open lake forecast for lake superior
national weather service marquette mi
357 pm edt wed sep 16 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 of 30.4 inches today weakens to 30.3 inches over 
quebec early thursday morning as 29.9 inch low pressure moves along 
the western hudson bay shoreline. meanwhile, 30.4 inch high pressure 
develops over north dakota and manitoba. this high moves over 
northern ontario and lake superior by friday morning as the low 
pushes into quebec and another 29.9 inch low develops over south 
dakota and nebraska. the high weakens to 30.3 inches as it moves to 
the quebec/ontario line saturday morning as the low shifts to the 
upper mississippi valley. by sunday morning, another 30.3 inch high 
will move over northwestern ontario. the high shifts to northeastern 
ontario monday morning.





lsz162-170800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
357 pm edt wed sep 16 2026 /257 pm cdt wed sep 16 2026/

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...northeast winds 5 to 15 knots becoming east less than
10 knots after midnight, then veering west late. a slight chance
of showers through midnight. waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight, then veering east late. waves
building to 1 to 3 feet. 
.friday...east winds 10 to 20 knots increasing to 15 to 25 knots
by mid afternoon. a chance of showers. waves 1 to 3 feet. 
.friday night...east winds 15 to 25 knots. a chance of showers.
waves building to 2 to 4 feet. 
.saturday...east winds 20 to 30 knots backing northeast by mid
afternoon. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet. 
.saturday night...northeast winds 15 to 25 knots. waves subsiding
to calm to 2 feet, then building to 1 to 3 feet. 
.sunday...northeast gales to 35 knots becoming east 20 to
30 knots. waves building to 3 to 6 feet occasionally to 8 feet,
then subsiding to 1 to 3 feet. 
.monday...east winds 15 to 25 knots. waves subsiding to calm to
2 feet. 

$$

fzus63 kmqt 161958
glfls 
expires:202609170800;;562610

open lake forecast for lake superior
national weather service marquette mi
357 pm edt wed sep 16 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 of 30.4 inches today weakens to 30.3 inches over 
quebec early thursday morning as 29.9 inch low pressure moves along 
the western hudson bay shoreline. meanwhile, 30.4 inch high pressure 
develops over north dakota and manitoba. this high moves over 
northern ontario and lake superior by friday morning as the low 
pushes into quebec and another 29.9 inch low develops over south 
dakota and nebraska. the high weakens to 30.3 inches as it moves to 
the quebec/ontario line saturday morning as the low shifts to the 
upper mississippi valley. by sunday morning, another 30.3 inch high 
will move over northwestern ontario. the high shifts to northeastern 
ontario monday morning.





lsz263-170800-
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-
357 pm edt wed sep 16 2026

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots veering southeast after
midnight, then veering southwest late. a slight chance of showers
through midnight. waves calm to 2 feet. 
.thursday...west winds 5 to 15 knots. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots becoming northeast
10 to 20 knots after midnight, then becoming east 5 to 15 knots
late. waves building to 1 to 3 feet. 
.friday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. a chance of showers by mid afternoon. waves
subsiding to calm to 2 feet. 
.friday night...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. a chance of showers. waves building to
1 to 3 feet, then subsiding to calm to 2 feet. 
.saturday...east winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...northeast winds 15 to 25 knots. waves building
to 1 to 3 feet. 
.sunday...northeast gales to 35 knots becoming east 20 to
30 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to calm to 2 feet. 
.monday...east winds 15 to 25 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 

$$