fzus63 kmqt 270801
glfls 
expires:202610272000;;790638

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 27 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...

30.5 inch high pressure centered over northern ontario this morning 
shifts east to the saint lawrence seaway this evening, with 30.4 
inch ridging over lake superior weakening to 30.1 inches through 
tonight. a developing 29.8 inch colorado low lifts through the 
plains on wednesday, eventually moving across lake superior 
wednesday night into early thursday morning. high pressure of 30.2 
to 30.3 inches returns to the upper great lakes by friday, 
strengthening to 30.4 inches over the lower great lakes on saturday 
as ridging of 30.1 to 30.2 inches lingers over lake superior through 
the weekend.




lsz162-272000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt tue oct 27 2026 /300 am cdt tue oct 27 2026/

.early this morning...east winds 15 to 25 knots. a chance of rain
showers. waves 1 to 3 feet building to 2 to 4 feet. 
.today...east winds 15 to 25 knots. rain showers. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 2 to
4 feet. 
.tonight...southeast winds 10 to 20 knots becoming southwest 5 to
15 knots after midnight. a slight chance of showers. waves
subsiding to calm to 2 feet. 
.wednesday...southwest winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon, then backing east late. a chance of
showers by mid afternoon. waves calm to 2 feet. 
.wednesday night...east winds 5 to 15 knots becoming northwest
10 to 20 knots after midnight. showers and a slight chance of
thunderstorms through midnight. waves calm to 2 feet. 
.thursday...west winds 10 to 20 knots. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 
.thursday night...west winds 5 to 15 knots. waves calm to 2 feet.
.friday...west winds less than 10 knots becoming east 5 to
15 knots. waves calm to 2 feet. 
.saturday...east winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of showers. waves calm to 2 feet. 

$$

fzus63 kmqt 270801
glfls 
expires:202610272000;;790639

open lake forecast for lake superior
national weather service marquette mi
400 am edt tue oct 27 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...

30.5 inch high pressure centered over northern ontario this morning 
shifts east to the saint lawrence seaway this evening, with 30.4 
inch ridging over lake superior weakening to 30.1 inches through 
tonight. a developing 29.8 inch colorado low lifts through the 
plains on wednesday, eventually moving across lake superior 
wednesday night into early thursday morning. high pressure of 30.2 
to 30.3 inches returns to the upper great lakes by friday, 
strengthening to 30.4 inches over the lower great lakes on saturday 
as ridging of 30.1 to 30.2 inches lingers over lake superior through 
the weekend.




lsz263-272000-
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 edt tue oct 27 2026

.early this morning...east winds 5 to 15 knots. a slight chance
of rain showers. waves calm to 2 feet. 
.today...southeast winds 10 to 20 knots increasing to 15 to
25 knots late. a chance of rain showers through early afternoon,
then rain showers by mid afternoon. waves building to 2 to
4 feet. 
.tonight...southeast winds 10 to 20 knots veering southwest late.
a slight chance of showers. waves 2 to 4 feet. 
.wednesday...southwest winds 10 to 20 knots. a chance of showers
by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...south winds 10 to 20 knots veering northwest
after midnight. showers and a slight chance of thunderstorms
through midnight, then a slight chance of showers after midnight.
waves building to 1 to 3 feet. 
.thursday...west winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.thursday night...west winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots backing east. waves calm to
2 feet. 
.saturday...southeast winds 5 to 15 knots. a chance of rain
showers. waves calm to 2 feet. 

$$