fzus63 kmqt 092001
glfls 
expires:202603100800;;916071

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon mar 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 30.1 inch high will build to 30.3 inches over manitoba and ontario 
tonight through tuesday with a 30.1 inch ridge extending over lake 
superior. the high slowly moves into quebec tuesday night as 29.6 
low pressure moves into the lower midwest. this low moves through 
the lower great lakes wednesday at 29.5 inches. thursday, lake 
superior will be situated between a 29.3 inch low over southern 
quebec, a 29.4 inch low over north dakota, a 30.3 inch high over the 
lower mississippi river valley, and a 30.1 inch ridge over hudson 
bay. the dakotas low arrives near the lake friday morning, then 
moves near the lower great lakes friday night. a 30.2 inch ridge 
will then follow across the upper great lakes saturday, ahead of an 
approaching 29.5 inch low.



lsz162-100800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt mon mar 9 2026 /300 pm cdt mon mar 9 2026/

.late this afternoon...northwest winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...north winds 5 to 15 knots becoming northeast 10 to
20 knots after midnight. a chance of snow. waves building to 1 to
3 feet. 
.tuesday...northeast winds 15 to 25 knots veering east in the
afternoon. a chance of snow. waves building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday night...east winds 15 to 25 knots becoming northeast
10 to 20 knots after midnight. a chance of snow. waves subsiding
to 1 to 3 feet. 
.wednesday...north winds 10 to 20 knots backing northwest by mid
afternoon. a chance of snow through early afternoon. waves
subsiding to calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...southwest winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet. 
.thursday night...east winds 15 to 25 knots increasing to 20 to
30 knots after midnight. snow showers likely. waves building to
6 to 9 feet occasionally to 11 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 5 to
15 knots. a chance of snow showers. waves building to 8 to
11 feet occasionally to 14 feet, then subsiding to calm to
2 feet. 
.saturday...east winds 5 to 15 knots becoming northeast 20 to
30 knots. a chance of snow showers. freezing spray. waves
building to 5 to 8 feet occasionally to 10 feet. 

$$

fzus63 kmqt 092001
glfls 
expires:202603100800;;916072

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon mar 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 30.1 inch high will build to 30.3 inches over manitoba and ontario 
tonight through tuesday with a 30.1 inch ridge extending over lake 
superior. the high slowly moves into quebec tuesday night as 29.6 
low pressure moves into the lower midwest. this low moves through 
the lower great lakes wednesday at 29.5 inches. thursday, lake 
superior will be situated between a 29.3 inch low over southern 
quebec, a 29.4 inch low over north dakota, a 30.3 inch high over the 
lower mississippi river valley, and a 30.1 inch ridge over hudson 
bay. the dakotas low arrives near the lake friday morning, then 
moves near the lower great lakes friday night. a 30.2 inch ridge 
will then follow across the upper great lakes saturday, ahead of an 
approaching 29.5 inch low.



lsz263-100800-
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 edt mon mar 9 2026

.late this afternoon...northwest winds 5 to 15 knots. waves 2 to
4 feet. 
.tonight...north winds 5 to 15 knots veering northeast after
midnight. a chance of snow. waves subsiding to calm to 2 feet,
then building to 1 to 3 feet. 
.tuesday...northeast winds 10 to 20 knots veering east in the
afternoon. a slight chance of snow. waves building to 3 to 5 feet
occasionally to 7 feet. 
.tuesday night...east winds to 30 knots with a few gale force
gusts to 35 knots possible backing northeast after midnight. a
chance of snow through midnight, then snow likely after midnight.
waves subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.wednesday...north gales to 35 knots diminishing to 15 to
25 knots by mid afternoon. a chance of snow through early
afternoon. waves subsiding to 1 to 3 feet. 
.wednesday night...north winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...north winds less than 10 knots becoming southeast
10 to 20 knots by mid afternoon. waves building to 2 to 4 feet. 
.thursday night...southeast winds 20 to 30 knots becoming east
gales to 35 knots after midnight. a chance of snow showers
through midnight, then snow showers likely after midnight.
freezing spray after midnight. waves building to 11 to 15 feet
occasionally to 19 feet. 
.friday...north gales to 35 knots becoming northwest 10 to
20 knots. freezing spray. a chance of snow showers. waves
building to 12 to 17 feet occasionally to 21 feet, then subsiding
to 2 to 4 feet. 
.saturday...east winds 5 to 15 knots increasing to 20 to
30 knots. a chance of snow showers. freezing spray. waves
subsiding to calm to 2 feet, then building to 7 to 10 feet
occasionally to 13 feet. 

$$