fzus63 kmqt 022100
glfls 
expires:202603030900;;518808

open lake forecast for lake superior
national weather service marquette mi
400 pm est mon mar 2 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 30.6 high currently centered over lake ontario continues to shift 
east today as a 29.7 inch low over northern manitoba moves east over 
hudson bay, deepening to 29.6 inches. the low drags a weak trough of 
30.2 inches over lake superior tonight before weak ridging builds 
over the lake on tuesday as another, more compact high of 30.4 
inches moves to james bay. another large area of high pressure will 
move into central and eastern canada by thursday morning. the strong 
high will help keep a 29.7 inch low moving up from the southern 
plains to our south as it weakens to 29.9 inches by the time it 
reaches the lower great lakes wednesday night, dissipating 
thereafter.



lsz162-030900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est mon mar 2 2026 /300 pm cst mon mar 2 2026/

.late this afternoon...southwest winds 15 to 25 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...southwest winds 15 to 25 knots diminishing to 5 to
15 knots by midnight. waves subsiding to calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots backing east by late
morning, then veering west by mid afternoon. a slight chance of
snow showers. waves calm to 2 feet. 
.tuesday night...west winds 5 to 15 knots backing southwest late.
waves calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots becoming south 10 to
20 knots in the afternoon. waves calm to 2 feet. 
.wednesday night...east winds 10 to 20 knots backing northeast
after midnight. waves calm to 2 feet. 
.thursday...northeast winds 15 to 25 knots. waves building to
2 to 4 feet. 
.thursday night...northeast winds 10 to 20 knots becoming east
5 to 15 knots after midnight. waves subsiding to 1 to 3 feet. 
.friday...east winds 5 to 15 knots backing north. a chance of
rain showers. waves subsiding to calm to 2 feet. 
.saturday...west winds 10 to 20 knots becoming southwest 20 to
30 knots. waves building to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 022100
glfls 
expires:202603030900;;518809

open lake forecast for lake superior
national weather service marquette mi
400 pm est mon mar 2 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 30.6 high currently centered over lake ontario continues to shift 
east today as a 29.7 inch low over northern manitoba moves east over 
hudson bay, deepening to 29.6 inches. the low drags a weak trough of 
30.2 inches over lake superior tonight before weak ridging builds 
over the lake on tuesday as another, more compact high of 30.4 
inches moves to james bay. another large area of high pressure will 
move into central and eastern canada by thursday morning. the strong 
high will help keep a 29.7 inch low moving up from the southern 
plains to our south as it weakens to 29.9 inches by the time it 
reaches the lower great lakes wednesday night, dissipating 
thereafter.



lsz263-030900-
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 pm est mon mar 2 2026

...gale warning in effect until 7 pm est this evening...

.late this afternoon...southwest winds 20 to 30 knots. waves 2 to
4 feet. 
.tonight...southwest winds 20 to 30 knots diminishing to 5 to
15 knots by midnight. a slight chance of snow showers after
midnight. waves subsiding to calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots veering east by late
morning, then veering southwest by mid afternoon. a slight chance
of rain showers, freezing rain and snow showers. waves calm to
2 feet. 
.tuesday night...west winds 15 to 25 knots backing southwest
late. waves calm to 2 feet. 
.wednesday...southwest winds 15 to 25 knots becoming south 10 to
20 knots in the afternoon. waves calm to 2 feet. 
.wednesday night...east winds 15 to 25 knots backing northeast
after midnight. waves building to 3 to 5 feet occasionally to
7 feet. 
.thursday...northeast winds 15 to 25 knots. waves building to
3 to 6 feet occasionally to 8 feet. 
.thursday night...east winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves 3 to 5 feet occasionally to
7 feet. 
.friday...southeast winds 5 to 15 knots becoming north 10 to
20 knots. a chance of rain showers. waves subsiding to 1 to
3 feet. 
.saturday...west winds 10 to 20 knots becoming southwest 20 to
30 knots. waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet. 

$$