fzus63 kmqt 062101
glfls 
expires:202603070900;;745874

open lake forecast for lake superior
national weather service marquette mi
400 pm est fri mar 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...

an elongated area of low pressure extending over the mississippi 
river valley from a 29.6 low centered over kansas this afternoon 
will stretch over lake superior at 29.7 inches tonight. the low 
deepens to 29.4 inches near the ontario/quebec line by late saturday 
morning. a weak 29.8 inch ridge will move over the lake saturday 
evening as the low departs into newfoundland. this ridge is kicked 
east by a 29.1 inch low that transits northern ontario sunday, 
reaching northwest quebec sunday night into monday as a secondary 
29.0 inch low trails behind near the northern shores of lake 
superior. the low slowly exits the area monday before being replaced 
by a 30.3 inch high over northern ontario tuesday. the high slowly 
moves into quebec on wednesday as low pressure moves into the lower 
midwest.



lsz162-070900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm est fri mar 6 2026 /300 pm cst fri mar 6 2026/

...gale watch in effect from late saturday night through sunday
morning...

.late this afternoon...northeast winds 5 to 15 knots. patchy fog.
rain showers likely. waves calm to 2 feet. 
.tonight...north winds 5 to 15 knots backing northwest by
midnight, then becoming north 10 to 20 knots late. patchy fog.
rain showers likely. a slight chance of snow showers after
midnight. waves calm to 2 feet. 
.saturday...north winds 10 to 20 knots backing northwest by late
morning, then backing southwest by mid afternoon. a chance of
snow showers, possibly mixed with rain in the morning. waves calm
to 2 feet. 
.saturday night...southwest winds 15 to 25 knots increasing to
gales to 35 knots by midnight. waves building to 5 to 8 feet
occasionally to 10 feet. 
.sunday...southwest gales to 35 knots diminishing to 20 to
30 knots in the afternoon. waves subsiding to 2 to 4 feet. 
.sunday night...southwest winds 15 to 25 knots becoming west
20 to 30 knots after midnight. waves 2 to 4 feet. 
.monday...west winds 15 to 25 knots. waves subsiding to calm to
2 feet. 
.monday night...northwest winds 10 to 20 knots veering north
after midnight. waves calm to 2 feet. 
.tuesday...northeast winds 15 to 25 knots. a chance of snow
showers. waves building to 3 to 5 feet occasionally to 7 feet. 
.wednesday...northeast winds 5 to 15 knots veering southwest.
waves subsiding to calm to 2 feet. 

$$

fzus63 kmqt 062101
glfls 
expires:202603070900;;745875

open lake forecast for lake superior
national weather service marquette mi
400 pm est fri mar 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...

an elongated area of low pressure extending over the mississippi 
river valley from a 29.6 low centered over kansas this afternoon 
will stretch over lake superior at 29.7 inches tonight. the low 
deepens to 29.4 inches near the ontario/quebec line by late saturday 
morning. a weak 29.8 inch ridge will move over the lake saturday 
evening as the low departs into newfoundland. this ridge is kicked 
east by a 29.1 inch low that transits northern ontario sunday, 
reaching northwest quebec sunday night into monday as a secondary 
29.0 inch low trails behind near the northern shores of lake 
superior. the low slowly exits the area monday before being replaced 
by a 30.3 inch high over northern ontario tuesday. the high slowly 
moves into quebec on wednesday as low pressure moves into the lower 
midwest.



lsz263-070900-
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 est fri mar 6 2026

...gale watch in effect from late saturday night through sunday
afternoon...

.late this afternoon...east winds 5 to 15 knots. patchy fog. a
chance of rain showers. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots becoming north 10 to 20 knots
by midnight, then increasing to 15 to 25 knots late. patchy fog.
rain showers likely. snow showers likely after midnight. waves
building to 1 to 3 feet. 
.saturday...north winds 15 to 25 knots becoming northwest 10 to
20 knots by late morning, then becoming west 15 to 25 knots by
mid afternoon. patchy fog in the morning. a chance of snow
showers, possibly mixed with rain in the morning. waves building
to 2 to 4 feet, then subsiding to calm to 2 feet. 
.saturday night...southwest winds 20 to 30 knots increasing to
gales to 40 knots by midnight. waves building to 6 to 9 feet
occasionally to 11 feet. 
.sunday...southwest gales to 40 knots diminishing to 20 to
30 knots in the afternoon. waves building to 7 to 10 feet
occasionally to 13 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...southwest winds 20 to 30 knots. waves subsiding
to 3 to 6 feet occasionally to 8 feet. 
.monday...west winds 20 to 30 knots diminishing to 15 to 25 knots
in the afternoon. waves subsiding to 2 to 4 feet. 
.monday night...northwest winds 10 to 20 knots becoming north
15 to 25 knots after midnight. waves subsiding to 1 to 3 feet. 
.tuesday...northeast winds 15 to 25 knots increasing to gales to
35 knots. a chance of snow showers. waves building to 4 to 7 feet
occasionally to 9 feet. 
.wednesday...northeast gales to 35 knots becoming west 10 to
20 knots. waves subsiding to calm to 2 feet. 

$$