fzus63 kmqt 290801
glfls 
expires:202603292000;;474713

open lake forecast for lake superior
national weather service marquette mi
400 am 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 morning lifts a 30.0 
inch trough over lake superior by this afternoon. 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 the upper great lakes to 30.5 inches by wednesday. by 
thursday, the high builds to 30.8 inches over northern quebec while 
a 29.3 inch low pressure organizes in the lee of the rockies.



lsz162-292000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sun mar 29 2026 /300 am cdt sun mar 29 2026/

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

$$

fzus63 kmqt 290801
glfls 
expires:202603292000;;474714

open lake forecast for lake superior
national weather service marquette mi
400 am 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 morning lifts a 30.0 
inch trough over lake superior by this afternoon. 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 the upper great lakes to 30.5 inches by wednesday. by 
thursday, the high builds to 30.8 inches over northern quebec while 
a 29.3 inch low pressure organizes in the lee of the rockies.



lsz263-292000-
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 am edt sun mar 29 2026

.early this morning...northeast winds 5 to 15 knots. waves calm
to 2 feet. 
.today...east winds 5 to 15 knots backing northeast late. waves
building to 1 to 3 feet. 
.tonight...northeast winds 5 to 15 knots. waves subsiding to 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. a slight chance of rain showers, freezing rain and snow
showers by mid afternoon. waves building to 3 to 6 feet
occasionally to 8 feet. 
.monday night...east winds 20 to 30 knots becoming northeast
15 to 25 knots after midnight. a chance of rain and snow showers,
possibly mixed with freezing rain. waves building to 5 to 8 feet
occasionally to 10 feet. 
.tuesday...northeast winds 20 to 30 knots diminishing to 15 to
25 knots by mid afternoon. a chance of rain showers through early
afternoon. a chance of snow showers. waves 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 becoming east 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.thursday...east winds 15 to 25 knots increasing to 20 to
30 knots. a chance of snow showers. waves building to 4 to 7 feet
occasionally to 9 feet. 

$$