fzus63 kmqt 101442
glfls 
expires:202603102000;;957186

open lake forecast for lake superior
national weather service marquette mi
1041 am edt tue mar 10 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 over ontario this morning will build to 30.3 
inches, with a 30.1 inch ridge extending over lake superior today 
through this evening. the high moves into quebec tonight as 29.6 low 
pressure moves into the lower midwest. this low moves through the 
lower great lakes wednesday at 29.4 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 at near 29.4 
inches, then moves into southern quebec friday night. a 30.2 inch 
ridge will then follow across the upper great lakes saturday, ahead 
of an approaching 29.5 inch low that deepens to 29.3 inches over 
southern michigan sunday evening.



lsz162-102000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1041 am edt tue mar 10 2026 /941 am cdt tue mar 10 2026/

.rest of today...east winds 15 to 25 knots increasing to 20 to
30 knots late. a slight chance of snow by mid afternoon. waves
2 to 4 feet building to 3 to 6 feet occasionally to 8 feet. 
.tonight...east winds 15 to 25 knots backing northeast after
midnight, then diminishing to 10 to 20 knots late. a chance of
snow. waves subsiding to 2 to 4 feet. 
.wednesday...north winds 10 to 20 knots backing northwest late. a
slight 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...west winds 5 to 15 knots becoming east 10 to 20 knots
by mid afternoon. a slight chance of snow showers, possibly mixed
with rain by mid afternoon. waves calm to 2 feet. 
.thursday night...east winds 20 to 30 knots backing northeast
after midnight. snow showers likely. waves building to 5 to
8 feet occasionally to 10 feet. 
.friday...northwest winds 20 to 30 knots diminishing to 5 to
15 knots. a chance of snow showers. waves subsiding to calm to
2 feet. 
.saturday...east winds 5 to 15 knots becoming northeast gales to
35 knots. a chance of snow showers. freezing spray. waves
building to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 101442
glfls 
expires:202603102000;;957187

open lake forecast for lake superior
national weather service marquette mi
1041 am edt tue mar 10 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 over ontario this morning will build to 30.3 
inches, with a 30.1 inch ridge extending over lake superior today 
through this evening. the high moves into quebec tonight as 29.6 low 
pressure moves into the lower midwest. this low moves through the 
lower great lakes wednesday at 29.4 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 at near 29.4 
inches, then moves into southern quebec friday night. a 30.2 inch 
ridge will then follow across the upper great lakes saturday, ahead 
of an approaching 29.5 inch low that deepens to 29.3 inches over 
southern michigan sunday evening.



lsz263-102000-
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-
1041 am edt tue mar 10 2026

.rest of today...northeast winds 10 to 20 knots veering east in
the afternoon. a slight chance of snow by mid afternoon. waves
2 to 4 feet building to 3 to 5 feet occasionally to 7 feet. 
.tonight...east winds to 30 knots with a few gale force gusts to
35 knots possible backing northeast late. a chance of snow. waves
subsiding to 2 to 4 feet. 
.wednesday...northeast winds to 30 knots with a few gale force
gusts to 35 knots possible becoming north 20 to 30 knots in the
afternoon, then diminishing to 10 to 20 knots late. a chance of
snow through early afternoon. waves building to 3 to 5 feet
occasionally to 7 feet, then subsiding to 2 to 4 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...north winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. a slight chance of snow showers by mid
afternoon. waves calm to 2 feet. 
.thursday night...east winds 20 to 30 knots increasing to gales
to 35 knots after midnight. a chance of snow showers. freezing
spray after midnight. waves building to 7 to 10 feet occasionally
to 13 feet. 
.friday...north winds 20 to 30 knots becoming northwest 10 to
20 knots. freezing spray. a chance of snow showers. waves
subsiding to 1 to 3 feet. 
.saturday...southeast winds 5 to 15 knots becoming east gales to
35 knots. a chance of snow showers. freezing spray. waves
subsiding to calm to 2 feet, then building to 9 to 12 feet
occasionally to 15 feet. 

$$