fzus63 kmqt 062001
glfls 
expires:202604070800;;940806

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon apr 6 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 30.1 inch trough is dropping southeast of the area this 
afternoon, with rising heights the rest of the day as strong 30.6 
inch high pressure centered over the northern plains extends riding 
into the great lakes. this feature moves 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 dakotas 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, building to 30.5 inches saturday.



lsz162-070800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt mon apr 6 2026 /300 pm cdt mon apr 6 2026/

.late this afternoon...north winds 15 to 25 knots. waves 3 to
5 feet occasionally to 7 feet. 
.tonight...north winds 10 to 20 knots backing northwest after
midnight, then diminishing to 5 to 15 knots late. waves subsiding
to calm to 2 feet. 
.tuesday...west winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. waves building to 1 to 3 feet, then
subsiding to calm to 2 feet. 
.tuesday night...southeast winds 10 to 20 knots veering south
after midnight, then increasing to 15 to 25 knots late. 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. a chance of rain
showers, possibly mixed with snow through early afternoon, then
rain showers by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of rain showers through
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.thursday...west winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. waves subsiding to 1 to 3 feet. 
.thursday night...west winds 5 to 15 knots veering northwest
after midnight. waves subsiding to calm to 2 feet. 
.friday...southwest winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots veering southeast. rain
showers likely. waves building to 2 to 4 feet. 

$$

fzus63 kmqt 062001
glfls 
expires:202604070800;;940807

open lake forecast for lake superior
national weather service marquette mi
400 pm edt mon apr 6 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 30.1 inch trough is dropping southeast of the area this 
afternoon, with rising heights the rest of the day as strong 30.6 
inch high pressure centered over the northern plains extends riding 
into the great lakes. this feature moves 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 dakotas 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, building to 30.5 inches saturday.



lsz263-070800-
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-
400 pm edt mon apr 6 2026

.late this afternoon...north winds 10 to 20 knots. freezing
spray. a slight chance of snow showers. waves 3 to 6 feet
occasionally to 8 feet. 
.tonight...north winds 10 to 20 knots becoming northwest 5 to
15 knots late. waves subsiding to calm to 2 feet. 
.tuesday...west winds 5 to 15 knots increasing to 10 to 20 knots
in the afternoon, then backing southwest late. waves building to
2 to 4 feet. 
.tuesday night...southeast winds 5 to 15 knots becoming south
10 to 20 knots after midnight, then increasing to 15 to 25 knots
late. a chance of snow showers, possibly mixed with rain after
midnight. waves subsiding to calm to 2 feet, then building to
3 to 5 feet occasionally to 7 feet. 
.wednesday...southeast winds 15 to 25 knots. snow showers likely,
possibly mixed with rain showers through early afternoon, then
rain showers by mid afternoon. waves building to 4 to 7 feet
occasionally to 9 feet. 
.wednesday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a chance of rain showers through
midnight. waves subsiding to 3 to 6 feet occasionally to 8 feet,
then building to 5 to 8 feet occasionally to 10 feet. 
.thursday...west winds 20 to 30 knots. waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.thursday night...west winds 5 to 15 knots veering northwest
after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest. waves calm
to 2 feet. 
.saturday...southwest winds 5 to 15 knots becoming south 15 to
25 knots. a chance of rain showers. waves building to 3 to 5 feet
occasionally to 7 feet. 

$$