fzus63 kmqt 110201
glfls 
expires:202603110800;;985117

open lake forecast for lake superior
national weather service marquette mi
1000 pm 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...

tonight, lake superior is between a 29.6 inch low over northern 
illinois and a 30.5 inch high over quebec. the 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 the mouth of the st 
lawrence river, 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 29.2 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 29.2 
inches over southern michigan sunday evening. monday, the low will 
move to the ontario/quebec line while 30.4 inch high pressure 
overspreads the northern plains.



lsz162-110800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt tue mar 10 2026 /900 pm cdt tue mar 10 2026/

.rest of tonight...east winds 15 to 25 knots backing northeast
after midnight. snow likely. waves 3 to 6 feet occasionally to
8 feet. 
.wednesday...north winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon, then backing northwest late. a chance
of snow through early afternoon. waves building to 3 to 6 feet
occasionally to 8 feet, then subsiding to 1 to 3 feet. 
.wednesday night...northwest winds 10 to 20 knots veering north
after midnight, then becoming northwest 5 to 15 knots late. waves
subsiding to calm to 2 feet. 
.thursday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. a slight chance of rain and snow showers by mid
afternoon. waves building to 1 to 3 feet. 
.thursday night...east winds 20 to 30 knots becoming northeast
gales to 35 knots after midnight. snow showers likely. freezing
spray after midnight. waves building to 8 to 11 feet occasionally
to 14 feet. 
.friday...north winds 20 to 30 knots becoming northwest 15 to
25 knots by mid afternoon. freezing spray through early
afternoon. a chance of snow showers. waves building to 9 to
12 feet occasionally to 15 feet, then subsiding to 4 to 7 feet
occasionally to 9 feet. 
.friday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.saturday...south 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. 
.sunday...north gales to 40 knots. freezing spray. a chance of
snow showers. waves building to 10 to 14 feet occasionally to
18 feet, then subsiding to 5 to 8 feet occasionally to 10 feet. 

$$

fzus63 kmqt 110201
glfls 
expires:202603110800;;985118

open lake forecast for lake superior
national weather service marquette mi
1000 pm 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...

tonight, lake superior is between a 29.6 inch low over northern 
illinois and a 30.5 inch high over quebec. the 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 the mouth of the st 
lawrence river, 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 29.2 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 29.2 
inches over southern michigan sunday evening. monday, the low will 
move to the ontario/quebec line while 30.4 inch high pressure 
overspreads the northern plains.



lsz263-110800-
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 pm edt tue mar 10 2026

.rest of tonight...east winds 10 to 20 knots backing northeast
after midnight, then increasing to 15 to 25 knots late. snow
likely. waves 3 to 6 feet occasionally to 8 feet. 
.wednesday...north winds 15 to 25 knots diminishing to 10 to
20 knots late. snow likely through early afternoon. waves
building to 3 to 6 feet occasionally to 8 feet. 
.wednesday night...north winds 15 to 25 knots diminishing to 5 to
15 knots. waves subsiding to 1 to 3 feet. 
.thursday...north winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet,
then building to 1 to 3 feet. 
.thursday night...east winds 20 to 30 knots increasing to 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 10 to 14 feet occasionally to
18 feet. 
.friday...northeast gales to 35 knots becoming north 20 to
30 knots by mid afternoon. freezing spray. a chance of snow
showers. waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.friday night...northwest winds 10 to 20 knots. waves subsiding
to 1 to 3 feet. 
.saturday...south winds 5 to 15 knots becoming northeast gales to
35 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. 
.sunday...northeast gales to 35 knots becoming north gales to
45 knots. heavy freezing spray. a chance of snow showers. waves
building to 12 to 17 feet occasionally to 21 feet, then subsiding
to 10 to 14 feet occasionally to 18 feet. 

$$