fzus63 kmqt 272001
glfls 
expires:202610280800;;818385

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




lsz162-280800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt tue oct 27 2026 /300 pm cdt tue oct 27 2026/

.late this afternoon...east winds 15 to 25 knots. showers likely.
waves 3 to 5 feet occasionally to 7 feet subsiding to 2 to
4 feet. 
.tonight...southeast winds 5 to 15 knots veering southwest after
midnight. a chance of showers through midnight. patchy drizzle.
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 and a slight chance of thunderstorms by mid afternoon.
waves calm to 2 feet. 
.wednesday night...east winds 10 to 20 knots veering west after
midnight, then increasing to 15 to 25 knots late. showers and a
slight chance of thunderstorms through midnight. waves building
to 1 to 3 feet. 
.thursday...west winds 15 to 25 knots. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.thursday night...west winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.friday...west winds 5 to 15 knots. waves calm to 2 feet. 
.friday night...north winds 5 to 15 knots veering northeast after
midnight. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots. waves calm to 2 feet. 
.sunday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 272001
glfls 
expires:202610280800;;818386

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




lsz263-280800-
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 edt tue oct 27 2026

.late this afternoon...southeast winds 10 to 20 knots. a chance
of showers. waves 2 to 4 feet. 
.tonight...southeast winds 10 to 20 knots veering south after
midnight, then becoming southwest 5 to 15 knots late. a chance of
showers and patchy drizzle through midnight. waves subsiding to
1 to 3 feet. 
.wednesday...southwest winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon, then backing east late. a chance of
showers by mid afternoon. waves subsiding to calm to 2 feet. 
.wednesday night...southeast winds 10 to 20 knots becoming west
15 to 25 knots after midnight, then diminishing to 10 to 20 knots
late. showers and a slight chance of thunderstorms through
midnight. waves building to 2 to 4 feet. 
.thursday...west winds 20 to 30 knots. waves building to 4 to
7 feet occasionally to 9 feet, then subsiding to 3 to 6 feet
occasionally to 8 feet. 
.thursday night...west winds 10 to 20 knots. waves subsiding to
1 to 3 feet. 
.friday...west winds 5 to 15 knots. waves subsiding to calm to
2 feet. 
.friday night...northwest winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.saturday...south winds less than 10 knots. waves calm to 2 feet.
.sunday...southwest winds less than 10 knots becoming east 5 to
15 knots. waves calm to 2 feet. 

$$