fzus63 kmqt 070300
glfls 
expires:202603070900;;760588

open lake forecast for lake superior
national weather service marquette mi
1000 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 29.7 inch low pressure extending over the upper 
mississippi river valley tonight will deepen to 29.6 inches over 
eastern lake superior saturday morning. the low deepens to 29.3 
inches over quebec saturday afternoon. a weak 29.8 inch ridge will 
move over the lake saturday evening associated with a 30.1 inch high 
over the southern plains as the low departs into labrador. this 
ridge is kicked east by a 29.0 inch low that transits northern 
ontario sunday, reaching northwest quebec sunday night into monday 
as a secondary 29.1 inch low trails behind near the northern shores 
of lake superior. the low exits the area monday afternoon before 
being replaced by a 30.3 inch high over northern ontario tuesday. 
the high slowly moves into quebec on wednesday as 29.6 low pressure 
moves across the southern great lakes basin. thursday morning, lake 
superior will be situated between 29.4 inch high pressure over new 
england and 30.3 inch high pressure broadly spanning the plains.



lsz162-070900-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm est fri mar 6 2026 /900 pm cst fri mar 6 2026/

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

.rest of 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. a slight chance of rain showers in
the evening. waves building to 3 to 5 feet occasionally to
7 feet, then subsiding to 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 070300
glfls 
expires:202603070900;;760589

open lake forecast for lake superior
national weather service marquette mi
1000 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 29.7 inch low pressure extending over the upper 
mississippi river valley tonight will deepen to 29.6 inches over 
eastern lake superior saturday morning. the low deepens to 29.3 
inches over quebec saturday afternoon. a weak 29.8 inch ridge will 
move over the lake saturday evening associated with a 30.1 inch high 
over the southern plains as the low departs into labrador. this 
ridge is kicked east by a 29.0 inch low that transits northern 
ontario sunday, reaching northwest quebec sunday night into monday 
as a secondary 29.1 inch low trails behind near the northern shores 
of lake superior. the low exits the area monday afternoon before 
being replaced by a 30.3 inch high over northern ontario tuesday. 
the high slowly moves into quebec on wednesday as 29.6 low pressure 
moves across the southern great lakes basin. thursday morning, lake 
superior will be situated between 29.4 inch high pressure over new 
england and 30.3 inch high pressure broadly spanning the plains.



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-
1000 pm est fri mar 6 2026

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

.rest of tonight...north winds 5 to 15 knots increasing to 15 to
25 knots. patchy dense fog. rain showers likely. snow showers
likely after midnight. waves calm to 2 feet 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 7 to 10 feet
occasionally to 13 feet. 
.sunday...southwest gales to 40 knots diminishing to 20 to
30 knots in the afternoon. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...southwest winds 20 to 30 knots. a slight chance
of rain showers in the evening. 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. 

$$