fzus63 kmqt 030900
glfls 
expires:202603032100;;544595

open lake forecast for lake superior
national weather service marquette mi
400 am est tue mar 3 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 30.1 inch trough will remain over the lake today with ridging of 
30.2 inches building in tonight. a large area of high pressure will 
move into central and eastern canada wednesday into thursday 
morning. the strong high will help keep a 29.7 inch low moving up 
from the southern plains to our south as it weakens to 29.6 inches 
by the time it reaches the lower great lakes wednesday night, 
dissipating thereafter. on friday low pressure ejects out of the 
plains, reaching lake superior saturday morning at least at 29.8 
inches. behind the low a 29.9 inch ridge builds over the lake on 
saturday night before a stronger, 29.2 inch, low moves through 
central ontario on sunday.



lsz162-032100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est tue mar 3 2026 /300 am cst tue mar 3 2026/

.early this morning...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southwest winds 5 to 15 knots becoming west 10 to
20 knots by mid afternoon. a slight chance of snow showers in the
morning. a slight chance of drizzle and freezing drizzle. waves
calm to 2 feet. 
.tonight...west winds 5 to 15 knots backing southwest by
midnight. a slight chance of snow showers in the evening. waves
calm to 2 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots by late morning, then backing south by mid afternoon.
waves calm to 2 feet. 
.wednesday night...east winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. waves building to 1 to 3 feet,
then subsiding to calm to 2 feet. 
.thursday...northeast winds 15 to 25 knots. waves building to
2 to 4 feet. 
.thursday night...east winds 15 to 25 knots diminishing to 5 to
15 knots after midnight. waves subsiding to 1 to 3 feet. 
.friday...east winds 5 to 15 knots becoming north 10 to 20 knots.
rain showers likely, then a chance of rain showers. waves
subsiding to calm to 2 feet. 
.saturday...west winds 10 to 20 knots becoming southwest gales to
35 knots. waves building to 3 to 5 feet occasionally to 7 feet. 

$$

fzus63 kmqt 030900
glfls 
expires:202603032100;;544596

open lake forecast for lake superior
national weather service marquette mi
400 am est tue mar 3 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 30.1 inch trough will remain over the lake today with ridging of 
30.2 inches building in tonight. a large area of high pressure will 
move into central and eastern canada wednesday into thursday 
morning. the strong high will help keep a 29.7 inch low moving up 
from the southern plains to our south as it weakens to 29.6 inches 
by the time it reaches the lower great lakes wednesday night, 
dissipating thereafter. on friday low pressure ejects out of the 
plains, reaching lake superior saturday morning at least at 29.8 
inches. behind the low a 29.9 inch ridge builds over the lake on 
saturday night before a stronger, 29.2 inch, low moves through 
central ontario on sunday.



lsz263-032100-
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 est tue mar 3 2026

.early this morning...southwest winds 5 to 15 knots. waves calm
to 2 feet. 
.today...southwest winds 5 to 15 knots veering north by mid
afternoon. a slight chance of drizzle, freezing drizzle and snow
showers. waves calm to 2 feet. 
.tonight...northeast winds 15 to 25 knots veering southwest by
midnight. a slight chance of freezing drizzle and snow showers in
the evening. waves calm to 2 feet. 
.wednesday...southwest winds 15 to 25 knots diminishing to 10 to
20 knots by late morning, then becoming south 5 to 15 knots by
mid afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 15 to 25 knots. waves building
to 3 to 6 feet occasionally to 8 feet. 
.thursday...northeast winds 15 to 25 knots veering east in the
afternoon. waves building to 3 to 6 feet occasionally to 8 feet. 
.thursday night...east winds 15 to 25 knots becoming southeast
10 to 20 knots after midnight. waves 3 to 5 feet occasionally to
7 feet. 
.friday...southeast winds 5 to 15 knots becoming north 15 to
25 knots. a chance of rain showers. waves subsiding to 1 to
3 feet. 
.saturday...west winds 15 to 25 knots becoming southwest gales to
40 knots. waves subsiding to calm to 2 feet, then building to
3 to 6 feet occasionally to 8 feet. 

$$