fzus63 kmqt 060801
glfls 
expires:202604062000;;913943

open lake forecast for lake superior
national weather service marquette mi
401 am 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 over the lake this morning departs to the 
southeast, deepening to 30.0 inches over the lower great lakes this 
afternoon. meanwhile, 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 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.



lsz162-062000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon apr 6 2026 /301 am cdt mon apr 6 2026/

.early this morning...northwest winds 20 to 30 knots. a chance of
snow showers. waves calm to 2 feet building to 2 to 4 feet. 
.today...north winds 20 to 30 knots becoming northwest 15 to
25 knots late. a chance of snow showers. waves building to 3 to
6 feet occasionally to 8 feet. 
.tonight...northwest winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to calm to 2 feet. 
.tuesday...west winds 10 to 20 knots backing southwest in the
afternoon. waves building to 1 to 3 feet, then subsiding to calm
to 2 feet. 
.tuesday night...southeast winds 5 to 15 knots becoming south
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. snow showers likely
through early afternoon. rain showers. 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. waves
building to 3 to 6 feet occasionally to 8 feet, then subsiding to
2 to 4 feet. 
.thursday...west winds 20 to 30 knots diminishing to 10 to
20 knots. waves building to 4 to 7 feet occasionally to 9 feet,
then subsiding to calm to 2 feet. 
.friday...southwest winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 060801
glfls 
expires:202604062000;;913944

open lake forecast for lake superior
national weather service marquette mi
401 am 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 over the lake this morning departs to the 
southeast, deepening to 30.0 inches over the lower great lakes this 
afternoon. meanwhile, 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 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.



lsz263-062000-
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-
401 am edt mon apr 6 2026

...gale warning in effect until 1 pm edt this afternoon...

.early this morning...north winds 20 to 30 knots. snow showers
likely. waves calm to 2 feet building to 2 to 4 feet. 
.today...north gales to 35 knots diminishing to 15 to 25 knots.
freezing spray. a chance of snow showers. waves building to 6 to
9 feet occasionally to 11 feet, then subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tonight...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. 
.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...south winds 10 to 20 knots. a chance of snow
showers, possibly mixed with rain 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 20 to 30 knots veering southwest
after midnight. a chance of rain showers. waves building to 5 to
8 feet occasionally to 10 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.thursday...west gales to 35 knots diminishing to 10 to 20 knots.
waves building to 6 to 9 feet occasionally to 11 feet, then
subsiding to 1 to 3 feet. 
.friday...west winds 5 to 15 knots backing southwest. waves
subsiding to calm to 2 feet. 

$$