fzus63 kmqt 240801
glfls 
expires:202605242000;;555892

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun may 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... 

today, lake superior will be between a 30.6 inch high off the canada 
coast and broad 29.6 inch low pressure over saskatchewan. a 30.1 
inch ridge forms monday over the lower great lakes as the low 
retreats to alberta. monday night, a 29.7 inch trough will be over 
northern ontario, extending 29.9 inch troughing over the lake. by 
tuesday night, a 30.2 inch high over the western shores of hudson 
bay will extend weak ridging over lake superior with 29.4 inch 
troughing forming in the lee of the northern us rockies. pressure 
rises over the lake as the high shifts southeast over northern 
ontario while low pressure over the west weakens on wednesday and 
thursday.



lsz162-242000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt sun may 24 2026 /300 am cdt sun may 24 2026/

...dense fog advisory in effect until 11 am edt /10 am cdt/ this
morning...

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...southwest winds 5 to 15 knots backing south late. waves
calm to 2 feet. 
.tonight...south winds 5 to 15 knots backing north after
midnight, then backing southwest late. waves calm to 2 feet. 
.monday...south winds 5 to 15 knots backing east in the
afternoon. waves calm to 2 feet. 
.monday night...north winds 5 to 15 knots backing west after
midnight. a slight chance of showers and thunderstorms through
midnight. waves calm to 2 feet. 
.tuesday...southwest winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves calm to 2 feet. 
.wednesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 
.thursday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 240801
glfls 
expires:202605242000;;555893

open lake forecast for lake superior
national weather service marquette mi
400 am edt sun may 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... 

today, lake superior will be between a 30.6 inch high off the canada 
coast and broad 29.6 inch low pressure over saskatchewan. a 30.1 
inch ridge forms monday over the lower great lakes as the low 
retreats to alberta. monday night, a 29.7 inch trough will be over 
northern ontario, extending 29.9 inch troughing over the lake. by 
tuesday night, a 30.2 inch high over the western shores of hudson 
bay will extend weak ridging over lake superior with 29.4 inch 
troughing forming in the lee of the northern us rockies. pressure 
rises over the lake as the high shifts southeast over northern 
ontario while low pressure over the west weakens on wednesday and 
thursday.



lsz263-242000-
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 sun may 24 2026

.early this morning...west winds 5 to 15 knots. waves 2 to
4 feet. 
.today...west winds 5 to 15 knots backing south late. waves
subsiding to calm to 2 feet. 
.tonight...south winds 5 to 15 knots veering southwest after
midnight. waves calm to 2 feet. 
.monday...south winds less than 10 knots becoming east 5 to
15 knots in the afternoon, then veering southeast late. waves
calm to 2 feet. 
.monday night...southwest winds 5 to 15 knots. a slight chance of
showers and thunderstorms through midnight. waves calm to 2 feet.
.tuesday...west winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots increasing to
10 to 20 knots after midnight. waves calm to 2 feet. 
.wednesday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 
.thursday...northeast winds 5 to 15 knots. waves calm to 2 feet. 

$$