fzus63 kmqt 292001
glfls 
expires:202603300800;;501115

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun mar 29 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 29.7 inch low over the central plains this afternoon lifts a 30.0 
inch trough over lake superior. this trough lingers over the great 
lakes and slowly deepens with time early this week before the low 
pushes through at 29.6 inches on tuesday. as the low tracks along 
the st. lawrence seaway tuesday night, 30.3 inch high pressure 
builds over the northern plains, gradually building pressure over 
northern ontario to 30.6 inches by wednesday. by thursday, the high 
builds to 30.8 inches over northern quebec while a weak 29.9 inch 
low passes over the southern great lakes basin and a 29.3 inch low 
pressure organizes in the lee of the rockies.



lsz162-300800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt sun mar 29 2026 /300 pm cdt sun mar 29 2026/

.late this afternoon...northeast winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots. waves calm to 2 feet. 
.monday...northeast winds 10 to 20 knots becoming east 15 to
25 knots in the afternoon, then increasing to 20 to 30 knots
late. waves building to 3 to 6 feet occasionally to 8 feet. 
.monday night...east winds 20 to 30 knots backing northeast late.
a chance of rain showers, snow showers, possibly mixed with
freezing rain and sleet after midnight. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tuesday...northeast winds 15 to 25 knots diminishing to 10 to
20 knots by mid afternoon. a chance of rain showers, freezing
rain and sleet through early afternoon. a chance of snow showers.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday night...northwest winds 10 to 20 knots veering north
after midnight. waves subsiding to 1 to 3 feet. 
.wednesday...northeast winds 10 to 20 knots veering east by mid
afternoon. waves subsiding to calm to 2 feet, then building to
2 to 4 feet. 
.wednesday night...east winds 15 to 25 knots. waves building to
4 to 7 feet occasionally to 9 feet. 
.thursday...east gales to 40 knots. a chance of snow showers.
waves building to 10 to 14 feet occasionally to 18 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet. 
.friday...east winds 15 to 25 knots. a chance of rain and snow
showers. waves subsiding to 4 to 7 feet occasionally to 9 feet. 

$$

fzus63 kmqt 292001
glfls 
expires:202603300800;;501116

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sun mar 29 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 29.7 inch low over the central plains this afternoon lifts a 30.0 
inch trough over lake superior. this trough lingers over the great 
lakes and slowly deepens with time early this week before the low 
pushes through at 29.6 inches on tuesday. as the low tracks along 
the st. lawrence seaway tuesday night, 30.3 inch high pressure 
builds over the northern plains, gradually building pressure over 
northern ontario to 30.6 inches by wednesday. by thursday, the high 
builds to 30.8 inches over northern quebec while a weak 29.9 inch 
low passes over the southern great lakes basin and a 29.3 inch low 
pressure organizes in the lee of the rockies.



lsz263-300800-
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 29 2026

.late this afternoon...northeast winds 5 to 15 knots. waves 1 to
3 feet subsiding to calm to 2 feet. 
.tonight...north winds 5 to 15 knots veering northeast late.
waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then becoming east 15 to 25 knots
late. waves building to 3 to 6 feet occasionally to 8 feet. 
.monday night...east winds 20 to 30 knots. a chance of rain and
snow showers, possibly mixed with freezing rain after midnight.
waves building to 4 to 7 feet occasionally to 9 feet, then
subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...northeast winds 15 to 25 knots. a chance of rain
showers through early afternoon. a chance of snow showers,
possibly mixed with freezing rain and sleet. waves building to
5 to 8 feet occasionally to 10 feet, then subsiding to 3 to
6 feet occasionally to 8 feet. 
.tuesday night...north winds 10 to 20 knots. waves subsiding to
2 to 4 feet. 
.wednesday...northeast winds 5 to 15 knots. waves subsiding to
1 to 3 feet. 
.wednesday night...east winds 10 to 20 knots. waves building to
3 to 5 feet occasionally to 7 feet. 
.thursday...east winds 20 to 30 knots. a chance of snow showers.
waves building to 8 to 11 feet occasionally to 14 feet, then
subsiding to 6 to 9 feet occasionally to 11 feet. 
.friday...east winds 15 to 25 knots. a chance of rain showers.
waves subsiding to 4 to 8 feet occasionally to 10 feet. 

$$