fzus63 kmqt 060201
glfls 
expires:202604060800;;900187

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun apr 5 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 weak 30.0 inch trough is dropping across the lake tonight, 
followed by rising heights into monday morning as it passes to our 
south. monday afternoon, 30.6 inch high pressure resides over north 
dakota before moving over the upper great lakes tuesday morning at 
30.5 inches. the high builds back to 30.6 inches over the lower 
great lakes tuesday night as a 29.5 inch low organizes along the 
montana/saskatchewan border. this low moves over the northwest angle 
wednesday night before moving north of the lake through thursday 
morning. high pressure of 30.4 inches then moves over the upper 
great lakes friday.



lsz162-060800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt sun apr 5 2026 /900 pm cdt sun apr 5 2026/

.rest of tonight...northwest winds 10 to 20 knots becoming north
15 to 25 knots late. a slight chance of rain showers. a chance of
snow showers after midnight. waves calm to 2 feet building to
2 to 4 feet. 
.monday...north winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then backing northwest late. a slight
chance of snow showers through early afternoon. waves building to
3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.monday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.tuesday night...southeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. a chance of snow showers, possibly
mixed with rain after midnight. waves building to 2 to 4 feet. 
.wednesday...southeast winds 15 to 25 knots becoming east 10 to
20 knots by mid afternoon. snow showers likely through early
afternoon. rain showers. waves building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday night...southwest winds 10 to 20 knots increasing to
20 to 30 knots after midnight. a chance of rain showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.thursday...west winds 20 to 30 knots diminishing to 5 to
15 knots. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to calm to 2 feet. 
.friday...southwest winds 5 to 15 knots backing south. waves calm
to 2 feet. 

$$

fzus63 kmqt 060201
glfls 
expires:202604060800;;900188

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt sun apr 5 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 weak 30.0 inch trough is dropping across the lake tonight, 
followed by rising heights into monday morning as it passes to our 
south. monday afternoon, 30.6 inch high pressure resides over north 
dakota before moving over the upper great lakes tuesday morning at 
30.5 inches. the high builds back to 30.6 inches over the lower 
great lakes tuesday night as a 29.5 inch low organizes along the 
montana/saskatchewan border. this low moves over the northwest angle 
wednesday night before moving north of the lake through thursday 
morning. high pressure of 30.4 inches then moves over the upper 
great lakes friday.



lsz263-060800-
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 sun apr 5 2026

.rest of tonight...northwest winds 5 to 15 knots becoming north
10 to 20 knots after midnight, then increasing to 20 to 30 knots
late. a slight chance of rain showers by midnight. a chance of
snow showers. waves calm to 2 feet building to 3 to 5 feet
occasionally to 7 feet. 
.monday...north winds 20 to 30 knots diminishing to 15 to
25 knots in the afternoon, then becoming northwest 10 to 20 knots
late. freezing spray through early afternoon. a chance of snow
showers. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet. 
.monday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...west winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves building to 2 to 4 feet. 
.tuesday night...south winds 10 to 20 knots. a slight chance of
snow showers after midnight. waves subsiding to calm to 2 feet,
then building to 2 to 4 feet. 
.wednesday...southeast winds 15 to 25 knots increasing to 20 to
30 knots by mid afternoon. snow showers likely through early
afternoon. rain showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.wednesday night...south winds 15 to 25 knots becoming southwest
20 to 30 knots after midnight. rain showers likely through
midnight. waves building to 4 to 8 feet occasionally to 10 feet. 
.thursday...west winds 20 to 30 knots diminishing to 5 to
15 knots. waves building to 7 to 10 feet occasionally to 13 feet,
then subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing south. waves calm to
2 feet. 

$$