fzus63 kmqt 112001
glfls 
expires:202607120800;;808556

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sat jul 11 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... 

high pressure of 30.0 inches draped from hudson bay to lake superior 
this afternoon builds to 30.1 inches over the lake by sunday 
morning. this surface high then shifts south toward the lower great 
lakes as pressure falls over the lake to 29.9 inches by sunday 
night. early next week a strong low of around 29.3 inches tracks 
northeast from the northern plains toward hudson bay, keeping 
pressure over lake superior at 29.9 inches through tuesday morning. 
wednesday, high pressure extending from the canadian prairies to the 
southern appalachians weakens slightly as the canadian low deepens 
to 29.1 inches in northern quebec. lake superior remains under weak 
high pressure wednesday into thursday at 30.0 inches.




lsz162-120800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 pm edt sat jul 11 2026 /300 pm cdt sat jul 11 2026/

.late this afternoon...southeast winds 5 to 15 knots. waves calm
to 2 feet. 
.tonight...southeast winds 5 to 15 knots backing north after
midnight, then backing southwest late. a slight chance of showers
and thunderstorms after midnight. waves calm to 2 feet. 
.sunday...southwest winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. waves building to 2 to 4 feet. 
.sunday night...southwest winds 15 to 25 knots. waves subsiding
to 1 to 3 feet, then building to 2 to 4 feet. 
.monday...southwest 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. 
.monday night...southwest winds 20 to 30 knots diminishing to
15 to 25 knots after midnight. waves subsiding to 2 to 4 feet. 
.tuesday...southwest winds 10 to 20 knots. waves subsiding to
calm to 2 feet. 
.tuesday night...west winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. waves calm to 2 feet.
.thursday...northeast winds 5 to 15 knots. a chance of showers.
waves calm to 2 feet. 

$$

fzus63 kmqt 112001
glfls 
expires:202607120800;;808557

open lake forecast for lake superior
national weather service marquette mi
400 pm edt sat jul 11 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... 

high pressure of 30.0 inches draped from hudson bay to lake superior 
this afternoon builds to 30.1 inches over the lake by sunday 
morning. this surface high then shifts south toward the lower great 
lakes as pressure falls over the lake to 29.9 inches by sunday 
night. early next week a strong low of around 29.3 inches tracks 
northeast from the northern plains toward hudson bay, keeping 
pressure over lake superior at 29.9 inches through tuesday morning. 
wednesday, high pressure extending from the canadian prairies to the 
southern appalachians weakens slightly as the canadian low deepens 
to 29.1 inches in northern quebec. lake superior remains under weak 
high pressure wednesday into thursday at 30.0 inches.




lsz263-120800-
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 sat jul 11 2026

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

$$