fzus63 kmqt 152001
glfls 
expires:202603160800;;734553

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun mar 15 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 29.3 inch low over northern illinois this afternoon deepens to 
29.1 inches over lower michigan tonight, reaching northern lake 
huron at 29.0 inches by monday afternoon. by monday night, lake 
superior will be between the low as it shifts into quebec and a 30.3 
inch high over the northern plains. this high shifts south of the 
great lakes basin through tuesday, extending weak 30.0 inch ridging 
over lake superior. a 29.5 inch low over the canadian prairie 
wednesday morning will begin to push towards the lake on wednesday, 
weakening to 29.8 inches over the western end of the lake wednesday 
night. weak ridging of around 30.1 inches will be over the lake 
thursday evening ahead of the next clipper low moving over northern 
ontario by friday afternoon at around 29.7 inches.



lsz162-160800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt sun mar 15 2026 /300 pm cdt sun mar 15 2026/

...gale warning in effect until 8 pm edt /7 pm cdt/ this
evening...
...heavy freezing spray warning in effect through late monday
night...
...storm warning in effect from 8 pm edt /7 pm cdt/ this evening
through monday morning...

.late this afternoon...northeast gales to 40 knots. freezing
spray. a chance of snow. waves 10 to 14 feet occasionally to
18 feet building to 12 to 17 feet occasionally to 21 feet. 
.tonight...north gales to 45 knots. heavy freezing spray. a
slight chance of snow. waves building to 15 to 20 feet
occasionally to 25 feet. 
.monday...north gales to 45 knots. a slight chance of snow
through early afternoon. heavy freezing spray. waves subsiding to
8 to 11 feet occasionally to 14 feet. 
.monday night...north gales to 35 knots diminishing to 10 to
20 knots. heavy freezing spray through midnight. waves subsiding
to 2 to 4 feet. 
.tuesday...northwest winds 5 to 15 knots becoming southwest 10 to
20 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots becoming southwest
15 to 25 knots after midnight. a chance of snow showers. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 
.wednesday...southwest winds 10 to 20 knots. waves subsiding to
1 to 3 feet. 
.wednesday night...southwest winds 10 to 20 knots veering west
after midnight. a chance of rain showers, possibly mixed with
snow. waves subsiding to calm to 2 feet. 
.thursday...south winds 5 to 15 knots increasing to 10 to
20 knots. waves building to 1 to 3 feet. 
.friday...west winds 15 to 25 knots becoming northwest 20 to
30 knots. waves 1 to 3 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202603160800;;734554

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun mar 15 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 29.3 inch low over northern illinois this afternoon deepens to 
29.1 inches over lower michigan tonight, reaching northern lake 
huron at 29.0 inches by monday afternoon. by monday night, lake 
superior will be between the low as it shifts into quebec and a 30.3 
inch high over the northern plains. this high shifts south of the 
great lakes basin through tuesday, extending weak 30.0 inch ridging 
over lake superior. a 29.5 inch low over the canadian prairie 
wednesday morning will begin to push towards the lake on wednesday, 
weakening to 29.8 inches over the western end of the lake wednesday 
night. weak ridging of around 30.1 inches will be over the lake 
thursday evening ahead of the next clipper low moving over northern 
ontario by friday afternoon at around 29.7 inches.



lsz263-160800-
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 sun mar 15 2026

...gale warning in effect until 8 pm edt this evening...
...heavy freezing spray warning in effect through tuesday
afternoon...
...storm warning in effect from 8 pm edt this evening through
monday afternoon...

.late this afternoon...northeast gales to 40 knots. freezing
spray. snow likely. waves 10 to 14 feet occasionally to 18 feet
building to 12 to 17 feet occasionally to 21 feet. 
.tonight...northeast gales to 45 knots backing north after
midnight. heavy freezing spray. a chance of snow. waves building
to 17 to 22 feet occasionally to 28 feet. 
.monday...north storm force winds to 55 knots diminishing to
gales to 45 knots late. heavy freezing spray. a chance of snow.
waves subsiding to 12 to 17 feet occasionally to 21 feet. 
.monday night...north gales to 45 knots. heavy freezing spray. a
slight chance of snow showers. waves subsiding to 5 to 8 feet
occasionally to 10 feet. 
.tuesday...northwest winds 15 to 25 knots becoming southwest 5 to
15 knots by mid afternoon. waves subsiding to calm to 2 feet. 
.tuesday night...south winds 10 to 20 knots increasing to 15 to
25 knots after midnight. waves building to 3 to 5 feet
occasionally to 7 feet. 
.wednesday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. waves subsiding to 2 to 4 feet. 
.wednesday night...southwest winds 5 to 15 knots veering
northwest after midnight. a chance of rain showers, possibly
mixed with snow. waves subsiding to calm to 2 feet. 
.thursday...northwest winds 5 to 15 knots becoming south 15 to
25 knots. a chance of snow showers. waves building to 1 to
3 feet. 
.friday...west winds 15 to 25 knots becoming northwest 20 to
30 knots. waves building to 3 to 5 feet occasionally to 7 feet. 

$$