fzus63 kmqt 070900
glfls 
expires:202603072100;;775809

open lake forecast for lake superior
national weather service marquette mi
400 am est sat mar 7 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 29.6 inch low pressure is moving across the lake early 
this morning, and deepens to 29.3 inches over quebec this afternoon. 
as the low continues to depart over labrador, weak 29.8 inch ridge 
will move over the lake this evening, associated with a 30.1 inch 
high over the southern plains. 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 low pressure over new england and 30.3 inch high pressure 
broadly spanning the plains.



lsz162-072100-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am est sat mar 7 2026 /300 am cst sat mar 7 2026/

...gale warning in effect from late tonight through sunday
morning...

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

$$

fzus63 kmqt 070900
glfls 
expires:202603072100;;775810

open lake forecast for lake superior
national weather service marquette mi
400 am est sat mar 7 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 29.6 inch low pressure is moving across the lake early 
this morning, and deepens to 29.3 inches over quebec this afternoon. 
as the low continues to depart over labrador, weak 29.8 inch ridge 
will move over the lake this evening, associated with a 30.1 inch 
high over the southern plains. 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 low pressure over new england and 30.3 inch high pressure 
broadly spanning the plains.



lsz263-072100-
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 sat mar 7 2026

...gale warning in effect from late tonight through sunday
afternoon...

.early this morning...north winds 15 to 25 knots. patchy fog.
rain showers, possibly mixed with snow and sleet. waves calm to
2 feet building to 1 to 3 feet. 
.today...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. snow showers, possibly
mixed with rain in the morning. waves building to 2 to 4 feet,
then subsiding to calm to 2 feet. 
.tonight...southwest winds 20 to 30 knots increasing to gales to
40 knots by midnight. a slight chance of rain and snow showers
after midnight. waves building to 7 to 10 feet occasionally to
13 feet. 
.sunday...southwest gales to 40 knots diminishing to 20 to
30 knots by mid afternoon. waves building to 8 to 11 feet
occasionally to 14 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.sunday night...southwest winds 15 to 25 knots increasing to
20 to 30 knots after midnight. a slight chance of rain showers in
the evening. waves subsiding to 3 to 6 feet occasionally to
8 feet. 
.monday...west winds 15 to 25 knots. waves subsiding to 2 to
4 feet. 
.monday night...northwest winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. waves subsiding to calm to 2 feet.
.tuesday...northeast winds 15 to 25 knots increasing to gales to
35 knots. a chance of snow showers. waves building to 7 to
10 feet occasionally to 13 feet. 
.wednesday...northeast gales to 35 knots becoming north 15 to
25 knots. waves building to 8 to 11 feet occasionally to 14 feet,
then subsiding to 3 to 5 feet occasionally to 7 feet. 

$$