fzus63 kmqt 282002
glfls 
expires:202604290800;;688672

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue apr 28 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 29.4 inch low over far northeastern ontario this afternoon reaches 
james bay by this evening, then continues into northern quebec on 
wednesday. weak ridging of 30.1 inches builds over the lake on 
wednesday between 30.3 inch high pressure over the canadian prairie 
and 29.7 inch troughing over the eastern seaboard. high pressure 
gradually strengthens to 30.2 inches over the lake through friday as 
the canadian high shifts east to northern ontario and hudson bay. 
weak troughing of 29.9 inches moves over the lake late on saturday 
and strengthens to 29.7 inches through sunday as low pressure 
deepens to 29.6 inches over james bay.



lsz162-290800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt tue apr 28 2026 /301 pm cdt tue apr 28 2026/

.late this afternoon...northwest winds 10 to 20 knots. waves 2 to
4 feet subsiding to 1 to 3 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing southwest in
the afternoon, then veering west late. a slight chance of rain
showers. a slight chance of snow showers by mid afternoon. waves
calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots increasing to 10 to
20 knots late. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots veering south by mid
afternoon. waves calm to 2 feet. 
.friday night...north winds 5 to 15 knots. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots veering northwest.
waves calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 

$$

fzus63 kmqt 282002
glfls 
expires:202604290800;;688673

open lake forecast for lake superior
national weather service marquette mi
401 pm edt tue apr 28 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 29.4 inch low over far northeastern ontario this afternoon reaches 
james bay by this evening, then continues into northern quebec on 
wednesday. weak ridging of 30.1 inches builds over the lake on 
wednesday between 30.3 inch high pressure over the canadian prairie 
and 29.7 inch troughing over the eastern seaboard. high pressure 
gradually strengthens to 30.2 inches over the lake through friday as 
the canadian high shifts east to northern ontario and hudson bay. 
weak troughing of 29.9 inches moves over the lake late on saturday 
and strengthens to 29.7 inches through sunday as low pressure 
deepens to 29.6 inches over james bay.



lsz263-290800-
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 pm edt tue apr 28 2026

.late this afternoon...west winds 15 to 25 knots. waves 4 to
7 feet occasionally to 9 feet subsiding to 3 to 6 feet
occasionally to 8 feet. 
.tonight...northwest winds 10 to 20 knots diminishing to 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing west in the
afternoon. a slight chance of snow showers by mid afternoon.
waves calm to 2 feet. 
.wednesday night...northwest winds 5 to 15 knots veering north
after midnight. a slight chance of rain and snow showers through
midnight. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.thursday night...northwest winds 5 to 15 knots veering north
after midnight. waves calm to 2 feet. 
.friday...north winds 5 to 15 knots backing west by mid
afternoon. waves calm to 2 feet. 
.friday night...west winds 5 to 15 knots veering north after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots veering west. waves
calm to 2 feet. 
.sunday...west winds 5 to 15 knots veering northwest. waves calm
to 2 feet. 

$$