fzus63 kmqt 252001
glfls 
expires:202606260800;;898423

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu jun 25 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... 

a 29.9 inch low currently tracking through lower michigan continues 
towards the st. lawrence seaway tonight into friday. as it leaves 
the upper midwest, expect weak 30.0 inch ridging to return to lake 
superior today, building to 30.1 inches by friday morning and 
remaining that way into at least sunday morning. meanwhile late this 
weekend, a 29.2 inch low lifts from the rockies towards the northern 
plains and canadian prairies, eventually becoming a 29.0 inch low 
spinning over the canadian prairies by tuesday morning. expect this 
to cause progressively deepening troughing over lake superior early 
next week, with the troughing over the lake becoming 29.8 inches by 
tuesday morning. 




lsz162-260800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt thu jun 25 2026 /300 pm cdt thu jun 25 2026/

.late this afternoon...north winds less than 10 knots. waves calm
to 2 feet. 
.tonight...north winds 5 to 15 knots diminishing to less than
10 knots after midnight. patchy fog after midnight. waves calm to
2 feet. 
.friday...north winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then veering northeast late. waves
calm to 2 feet. 
.friday night...east winds 5 to 15 knots backing northeast after
midnight. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...northeast winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 10 to 20 knots becoming northeast 15 to
25 knots by mid afternoon. a chance of showers. waves building to
2 to 4 feet. 
.sunday night...east winds 20 to 30 knots diminishing to 10 to
20 knots after midnight. a chance of showers through midnight. a
chance of thunderstorms. showers likely after midnight. waves
building to 3 to 5 feet occasionally to 7 feet, then subsiding to
2 to 4 feet. 
.monday...east winds 10 to 20 knots backing northeast. a chance
of showers and thunderstorms. waves subsiding to calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots veering north. a chance
of thunderstorms. showers likely. waves calm to 2 feet. 

$$

fzus63 kmqt 252001
glfls 
expires:202606260800;;898424

open lake forecast for lake superior
national weather service marquette mi
400 pm edt thu jun 25 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... 

a 29.9 inch low currently tracking through lower michigan continues 
towards the st. lawrence seaway tonight into friday. as it leaves 
the upper midwest, expect weak 30.0 inch ridging to return to lake 
superior today, building to 30.1 inches by friday morning and 
remaining that way into at least sunday morning. meanwhile late this 
weekend, a 29.2 inch low lifts from the rockies towards the northern 
plains and canadian prairies, eventually becoming a 29.0 inch low 
spinning over the canadian prairies by tuesday morning. expect this 
to cause progressively deepening troughing over lake superior early 
next week, with the troughing over the lake becoming 29.8 inches by 
tuesday morning. 




lsz263-260800-
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 thu jun 25 2026

.late this afternoon...west winds less than 10 knots. waves calm
to 2 feet. 
.tonight...west winds 5 to 15 knots becoming southwest less than
10 knots after midnight. patchy dense fog after midnight. waves
calm to 2 feet. 
.friday...southwest winds less than 10 knots increasing to 5 to
15 knots in the afternoon, then backing northeast late. waves
calm to 2 feet. 
.friday night...east winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...east winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. waves calm to 2 feet. 
.saturday night...east winds 10 to 20 knots becoming southeast
5 to 15 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves building to 2 to 4 feet. 
.sunday night...southeast winds 15 to 25 knots. a chance of
showers. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 
.monday...east winds 15 to 25 knots becoming south 10 to
20 knots. a chance of showers and thunderstorms. waves building
to 3 to 5 feet occasionally to 7 feet, then subsiding to 1 to
3 feet. 
.tuesday...southwest winds 5 to 15 knots. a chance of
thunderstorms. showers likely. waves subsiding to calm to 2 feet.

$$