fzus63 kmqt 250201
glfls 
expires:202603250800;;246339

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt tue mar 24 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...

as 30.5 inch ridging drifts farther eastward, a clipper low around 
29.7 inches phases with a shortwave low lifting off of the northern 
rockies. this brings troughing of at least 29.8 inches back across 
lake superior by tomorrow. a secondary 29.6 inch low moves over the 
upper great lakes tomorrow night into thursday. by friday, expansive 
ridging of 30.7 inches builds over the great plains, shifting over 
the mississippi river valley by saturday morning and south of the 
great lakes by that evening. the high shifts over the east coast for 
sunday at 30.6 inches as low pressure develops west of the great 
lakes in its wake.



lsz162-250800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 pm edt tue mar 24 2026 /900 pm cdt tue mar 24 2026/

.rest of tonight...east winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. a chance of freezing rain, rain and snow
showers after midnight. waves 1 to 3 feet building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.wednesday...east winds 5 to 15 knots backing northeast in the
afternoon. a slight chance of rain showers, freezing rain and
snow showers through early afternoon. waves subsiding to calm to
2 feet. 
.wednesday night...east winds 5 to 15 knots backing northeast
late. a chance of rain showers, possibly mixed with freezing rain
and snow showers after midnight. waves calm to 2 feet. 
.thursday...north winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a slight chance of rain and snow
showers through early afternoon. waves building to 1 to 3 feet. 
.thursday night...north winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.friday...northwest winds 10 to 20 knots backing west by mid
afternoon. waves building to 1 to 3 feet. 
.friday night...west winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.saturday...west winds 10 to 20 knots becoming east 5 to
15 knots. waves subsiding to calm to 2 feet. 
.sunday...southeast winds 5 to 15 knots becoming north 10 to
20 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 250201
glfls 
expires:202603250800;;246340

open lake forecast for lake superior
national weather service marquette mi
1000 pm edt tue mar 24 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...

as 30.5 inch ridging drifts farther eastward, a clipper low around 
29.7 inches phases with a shortwave low lifting off of the northern 
rockies. this brings troughing of at least 29.8 inches back across 
lake superior by tomorrow. a secondary 29.6 inch low moves over the 
upper great lakes tomorrow night into thursday. by friday, expansive 
ridging of 30.7 inches builds over the great plains, shifting over 
the mississippi river valley by saturday morning and south of the 
great lakes by that evening. the high shifts over the east coast for 
sunday at 30.6 inches as low pressure develops west of the great 
lakes in its wake.



lsz263-250800-
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 edt tue mar 24 2026

.rest of tonight...east winds 5 to 15 knots becoming southeast
10 to 20 knots late. a chance of snow showers. a chance of rain
showers after midnight. waves 1 to 3 feet building to 2 to
4 feet. 
.wednesday...southeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing northeast late. a chance
of snow showers, possibly mixed with rain. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 1 to 3 feet. 
.wednesday night...northeast winds 5 to 15 knots. a slight chance
of snow showers. a slight chance of rain showers and freezing
rain after midnight. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.thursday...north winds 15 to 25 knots. a chance of rain and snow
showers through early afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.thursday night...north winds 15 to 25 knots diminishing to 10 to
20 knots after midnight. waves subsiding to 1 to 3 feet. 
.friday...northwest winds 5 to 15 knots becoming west 15 to
25 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday night...west winds 15 to 25 knots veering northwest after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.saturday...west winds 15 to 25 knots becoming south 5 to
15 knots. waves subsiding to 2 to 4 feet. 
.sunday...south winds 5 to 15 knots becoming west 15 to 25 knots.
waves subsiding to 1 to 3 feet, then building to 3 to 5 feet
occasionally to 7 feet. 

$$