fzus63 kmqt 300801
glfls 
expires:202604302000;;771655

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz162-302000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt thu apr 30 2026 /301 am cdt thu apr 30 2026/

.early this morning...north winds 5 to 15 knots. scattered snow
showers, possibly mixed with rain. waves calm to 2 feet. 
.today...north winds 5 to 15 knots backing southwest late.
scattered snow showers, possibly mixed with rain. waves calm to
2 feet. 
.tonight...west winds 5 to 15 knots veering north after midnight,
then veering northeast late. a slight chance of rain and snow
showers through midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots veering southeast in the
afternoon, then veering south late. waves calm to 2 feet. 
.friday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots veering west after
midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots increasing to 10 to 20 knots.
a chance of rain showers. waves calm to 2 feet. 
.monday...northwest winds 10 to 20 knots. a chance of rain
showers. waves building to 1 to 3 feet, then subsiding to calm to
2 feet. 

$$

fzus63 kmqt 300801
glfls 
expires:202604302000;;771656

open lake forecast for lake superior
national weather service marquette mi
401 am edt thu apr 30 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...

weak ridging persists between 30.0 and 30.1 inches through early 
saturday as a 30.3 inch high slowly shifts east from the canadian 
prairies to northwest ontario and hudson bay. weak troughing of 29.8 
inches moves over the lake saturday night and deepens as low as 29.3 
inches by monday as a stronger low develops over the region.



lsz263-302000-
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-
401 am edt thu apr 30 2026

.early this morning...north winds 5 to 15 knots. isolated rain
and snow showers. waves calm to 2 feet. 
.today...north winds 5 to 15 knots becoming west less than
10 knots late. scattered snow showers, possibly mixed with rain.
waves calm to 2 feet. 
.tonight...northwest winds 5 to 15 knots veering north after
midnight. a chance of snow showers, possibly mixed with rain
through midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing southwest late. waves
calm to 2 feet. 
.friday night...west winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.saturday night...south winds 5 to 15 knots veering southwest
after midnight. waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots. a chance of rain showers.
waves building to 1 to 3 feet. 
.monday...west winds 10 to 20 knots becoming northwest 5 to
15 knots. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 

$$