fzus63 kmqt 120201
glfls 
expires:202603120800;;047731

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed mar 11 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 29.5 inch low over southern quebec this evening extends an 
inverted trough of 30.0 inches back over lake superior tonight. 
transient high pressure of 30.1 inches will cross the lake early 
thursday as the first low moves into the gulf of saint lawrence and 
another 29.3 inch low moves over north dakota. the dakotas low 
deepens to 29.1 inches in the vicinity of northern lake michigan 
friday morning, then moves over new england at 29.5 inches by 
saturday morning. a 30.2 inch ridge will extend over lake superior 
from central canada on saturday afternoon. a 29.3 inch low 
developing over the central plains saturday night will track to near 
lake huron at 28.9 inches by monday morning. high pressure of 30.4 
inches will overspread the northern plains on monday and move to 
lake superior by tuesday as the low departs into northern quebec.



lsz162-120800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt wed mar 11 2026 /900 pm cdt wed mar 11 2026/

...gale warning in effect from thursday evening through friday
morning...

.rest of tonight...northwest winds 15 to 25 knots diminishing to
5 to 15 knots. waves 2 to 4 feet subsiding to calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots backing south in the
afternoon, then becoming southeast 15 to 25 knots late. a chance
of snow showers by mid afternoon. waves building to 2 to 4 feet. 
.thursday night...east gales to 40 knots backing northeast late.
a slight chance of rain through midnight. snow. waves building to
11 to 15 feet occasionally to 19 feet. 
.friday...north gales to 35 knots becoming northwest 20 to
30 knots by mid afternoon. a chance of snow. waves subsiding to
6 to 9 feet occasionally to 11 feet. 
.friday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to calm to 2 feet.
.saturday...west winds 10 to 20 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots becoming northeast
15 to 25 knots after midnight. freezing spray after midnight.
waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday...northeast winds 20 to 30 knots becoming north gales to
40 knots. heavy freezing spray. a chance of snow showers. waves
building to 10 to 14 feet occasionally to 18 feet, then subsiding
to 9 to 12 feet occasionally to 15 feet. 
.monday...north gales to 35 knots becoming northwest 10 to
20 knots. heavy freezing spray. waves subsiding to calm to
2 feet. 

$$

fzus63 kmqt 120201
glfls 
expires:202603120800;;047732

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt wed mar 11 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 29.5 inch low over southern quebec this evening extends an 
inverted trough of 30.0 inches back over lake superior tonight. 
transient high pressure of 30.1 inches will cross the lake early 
thursday as the first low moves into the gulf of saint lawrence and 
another 29.3 inch low moves over north dakota. the dakotas low 
deepens to 29.1 inches in the vicinity of northern lake michigan 
friday morning, then moves over new england at 29.5 inches by 
saturday morning. a 30.2 inch ridge will extend over lake superior 
from central canada on saturday afternoon. a 29.3 inch low 
developing over the central plains saturday night will track to near 
lake huron at 28.9 inches by monday morning. high pressure of 30.4 
inches will overspread the northern plains on monday and move to 
lake superior by tuesday as the low departs into northern quebec.



lsz263-120800-
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 wed mar 11 2026

...gale warning in effect from thursday evening through friday
afternoon...

.rest of tonight...northwest winds 15 to 25 knots diminishing to
10 to 20 knots late. waves 3 to 6 feet occasionally to 8 feet,
then subsiding to 2 to 4 feet. 
.thursday...northwest winds 5 to 15 knots backing south in the
afternoon, then becoming southeast 15 to 25 knots late. a slight
chance of snow showers by mid afternoon. waves subsiding to calm
to 2 feet, then building to 2 to 4 feet. 
.thursday night...southeast gales to 35 knots becoming east gales
to 40 knots after midnight. freezing spray. snow. waves building
to 15 to 20 feet occasionally to 25 feet. 
.friday...north gales to 40 knots diminishing to 20 to 30 knots
by mid afternoon. freezing spray. a chance of snow. waves
subsiding to 7 to 10 feet occasionally to 13 feet. 
.friday night...north winds 20 to 30 knots becoming northwest
10 to 20 knots after midnight. freezing spray through midnight.
waves subsiding to 2 to 4 feet. 
.saturday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.saturday night...southwest winds 5 to 15 knots becoming
northeast 15 to 25 knots after midnight. freezing spray after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.sunday...northeast gales to 40 knots becoming north gales to
45 knots. heavy freezing spray. a chance of snow showers. waves
building to 15 to 20 feet occasionally to 25 feet. 
.monday...north gales to 45 knots becoming northwest 20 to
30 knots. heavy freezing spray. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 

$$