fzus63 kmqt 091400
glfls 
expires:202603092000;;900745

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 29.0 low exits the area this afternoon before being replaced by a 
30.4 inch high over northern ontario tuesday. 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.



lsz162-092000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt mon mar 9 2026 /900 am cdt mon mar 9 2026/

.rest of today...west winds 15 to 25 knots diminishing to 5 to
15 knots. waves 3 to 5 feet occasionally to 7 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 showers. waves calm to
2 feet. 
.tuesday...northeast winds 15 to 25 knots veering east late. a
slight chance of snow showers. waves building to 2 to 4 feet. 
.tuesday night...east winds 15 to 25 knots becoming northeast
10 to 20 knots after midnight. a chance of snow showers. waves
subsiding to 1 to 3 feet. 
.wednesday...northeast winds 10 to 20 knots becoming northwest
5 to 15 knots by mid afternoon. a slight chance of snow showers
through early afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...southeast winds 10 to 20 knots increasing to gales to
35 knots. a chance of snow showers, then snow showers, possibly
mixed with rain. waves building to 6 to 9 feet occasionally to
11 feet. 
.friday...northwest gales to 35 knots diminishing to 10 to
20 knots. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 091400
glfls 
expires:202603092000;;900746

open lake forecast for lake superior
national weather service marquette mi
1000 am 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 29.0 low exits the area this afternoon before being replaced by a 
30.4 inch high over northern ontario tuesday. 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.



lsz263-092000-
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 mar 9 2026

.rest of today...west winds 15 to 25 knots diminishing to 5 to
15 knots late. waves 4 to 7 feet occasionally to 9 feet subsiding
to 2 to 4 feet. 
.tonight...north winds 10 to 20 knots becoming northeast 15 to
25 knots after midnight. a chance of snow showers. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.tuesday...northeast winds 15 to 25 knots veering east late. a
slight chance of snow showers. waves building to 2 to 4 feet. 
.tuesday night...east gales to 35 knots backing northeast after
midnight. a chance of snow showers. waves subsiding to 1 to
3 feet. 
.wednesday...northeast gales to 35 knots becoming north 15 to
25 knots by mid afternoon. a slight chance of snow showers
through early afternoon. waves building to 2 to 4 feet, then
subsiding to 1 to 3 feet. 
.wednesday night...north winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.thursday...southeast winds 15 to 25 knots increasing to gales to
35 knots. a chance of rain showers, then snow showers, possibly
mixed with rain. waves building to 11 to 15 feet occasionally to
19 feet. 
.friday...northwest gales to 35 knots diminishing to 15 to
25 knots. a chance of snow showers. waves building to 12 to
17 feet occasionally to 21 feet, then subsiding to 2 to 4 feet. 

$$