fzus63 kmqt 141518
glfls 
expires:202604142330;;356198

open lake forecast for lake superior
national weather service marquette mi
1118 am edt tue apr 14 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 29.6 inch low over iowa early this morning lifts through northern 
lower michigan at 29.6 inches by mid morning. following this, weak 
ridging of around 29.8 to 29.9 inches moves back over lake superior 
from northern ontario this afternoon through wednesday before 
another low from the central plains lifts through lower michigan or 
closer to the straits at around 29.7 inches. ridging increases to 
29.8 inches over lake superior later in the day thursday before 
troughing of 29.4 to 29.6 inches moves across the lake friday 
through saturday. this deepens further to 29.2 inches over ontario 
sunday.



lsz162-142330-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1118 am edt tue apr 14 2026 /1018 am cdt tue apr 14 2026/

.rest of today...northeast winds 5 to 15 knots. patchy fog. a
slight chance of thunderstorms early in the afternoon. a chance
of rain showers. waves 1 to 3 feet subsiding to calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots backing north after
midnight. patchy fog. waves calm to 2 feet. 
.wednesday...northeast winds 5 to 15 knots. patchy fog through
early afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots. a slight chance
of rain showers. waves calm to 2 feet. 
.thursday...northeast winds 5 to 15 knots veering east by mid
afternoon. a slight chance of rain showers through early
afternoon. waves calm to 2 feet. 
.thursday night...northeast winds 10 to 20 knots. waves building
to 1 to 3 feet. 
.friday...northeast winds 10 to 20 knots becoming north 20 to
30 knots. a chance of rain showers, then rain showers, possibly
mixed with snow. waves building to 4 to 8 feet occasionally to
10 feet. 
.saturday...northwest winds 20 to 30 knots increasing to gales to
35 knots. a chance of rain showers. a chance of snow showers.
waves building to 6 to 9 feet occasionally to 11 feet. 

$$

fzus63 kmqt 141518
glfls 
expires:202604142330;;356199

open lake forecast for lake superior
national weather service marquette mi
1118 am edt tue apr 14 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 29.6 inch low over iowa early this morning lifts through northern 
lower michigan at 29.6 inches by mid morning. following this, weak 
ridging of around 29.8 to 29.9 inches moves back over lake superior 
from northern ontario this afternoon through wednesday before 
another low from the central plains lifts through lower michigan or 
closer to the straits at around 29.7 inches. ridging increases to 
29.8 inches over lake superior later in the day thursday before 
troughing of 29.4 to 29.6 inches moves across the lake friday 
through saturday. this deepens further to 29.2 inches over ontario 
sunday.



lsz263-142330-
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-
1118 am edt tue apr 14 2026

.rest of today...northeast winds 5 to 15 knots. patchy fog. a
chance of rain showers. a slight chance of thunderstorms by mid
afternoon. waves 1 to 3 feet subsiding to calm to 2 feet. 
.tonight...northeast winds 5 to 15 knots becoming north less than
10 knots after midnight, then veering northeast late. patchy fog
through midnight, then areas of dense fog after midnight. waves
calm to 2 feet. 
.wednesday...northeast winds less than 10 knots. patchy fog
through early afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds less than 10 knots becoming
north 5 to 15 knots after midnight. a slight chance of rain
showers. waves calm to 2 feet. 
.thursday...north winds 5 to 15 knots veering east by mid
afternoon. a slight chance of rain showers. waves calm to 2 feet.
.thursday night...east winds 5 to 15 knots increasing to 10 to
20 knots after midnight. waves building to 2 to 4 feet. 
.friday...east winds 15 to 25 knots increasing to 20 to 30 knots.
rain showers, possibly mixed with snow. waves building to 6 to
9 feet occasionally to 11 feet. 
.saturday...northwest gales to 40 knots. a chance of rain
showers. a chance of snow showers. waves building to 10 to
14 feet occasionally to 18 feet. 

$$