fzus63 kmqt 151402
glfls 
expires:202605152000;;601440

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri may 15 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 29.1 inch low over manitoba will move to northern ontario today. 
this low is expected to bring troughing of 29.6 inches over lake 
superior through saturday as it tracks to near james bay at 29.2 
inches by saturday morning. ridging of 30.1 inches builds over the 
lake from northern ontario saturday night into sunday. this is 
followed by another 29.7 inch trough extending northeast toward the 
upper great lakes from the central plains by monday midday, which 
lingers over the area through tuesday.



lsz162-152000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 am edt fri may 15 2026 /901 am cdt fri may 15 2026/

.rest of today...southwest winds 10 to 20 knots increasing to
20 to 30 knots. waves 3 to 5 feet occasionally to 7 feet building
to 4 to 7 feet occasionally to 9 feet. 
.tonight...southwest winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then veering west late. waves subsiding
to calm to 2 feet. 
.saturday...west winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon, then diminishing to 10 to 20 knots
late. waves building to 1 to 3 feet, then subsiding to calm to
2 feet. 
.saturday night...northeast winds 5 to 15 knots increasing to
15 to 25 knots after midnight. waves building to 2 to 4 feet. 
.sunday...northeast winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a chance of rain showers through early
afternoon, then rain showers likely and a slight chance of
thunderstorms by mid afternoon. waves building to 8 to 11 feet
occasionally to 14 feet. 
.sunday night...northeast gales to 35 knots diminishing to 20 to
30 knots after midnight. rain showers and a chance of
thunderstorms. waves subsiding to 4 to 7 feet occasionally to
9 feet. 
.monday...northeast winds 15 to 25 knots increasing to gales to
40 knots. rain showers and a chance of thunderstorms. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
10 to 14 feet occasionally to 18 feet. 
.tuesday...northeast gales to 40 knots becoming west 20 to
30 knots. a chance of rain showers. waves subsiding to 1 to
3 feet. 

$$

fzus63 kmqt 151402
glfls 
expires:202605152000;;601441

open lake forecast for lake superior
national weather service marquette mi
1001 am edt fri may 15 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 29.1 inch low over manitoba will move to northern ontario today. 
this low is expected to bring troughing of 29.6 inches over lake 
superior through saturday as it tracks to near james bay at 29.2 
inches by saturday morning. ridging of 30.1 inches builds over the 
lake from northern ontario saturday night into sunday. this is 
followed by another 29.7 inch trough extending northeast toward the 
upper great lakes from the central plains by monday midday, which 
lingers over the area through tuesday.



lsz263-152000-
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-
1001 am edt fri may 15 2026

.rest of today...southwest winds 15 to 25 knots increasing to
20 to 30 knots late. waves 3 to 6 feet occasionally to 8 feet
building to 4 to 7 feet occasionally to 9 feet. 
.tonight...southwest winds 20 to 30 knots diminishing to 10 to
20 knots after midnight, then veering west late. waves subsiding
to 2 to 4 feet. 
.saturday...west winds 10 to 20 knots. waves subsiding to 1 to
3 feet, then building to 2 to 4 feet. 
.saturday night...east winds 5 to 15 knots. waves subsiding to
calm to 2 feet, then building to 1 to 3 feet. 
.sunday...east winds 15 to 25 knots increasing to gales to
35 knots by mid afternoon. a slight chance of rain showers
through early afternoon, then rain showers likely and a slight
chance of thunderstorms by mid afternoon. waves building to 6 to
9 feet occasionally to 11 feet. 
.sunday night...east gales to 35 knots diminishing to 20 to
30 knots after midnight. rain showers and a chance of
thunderstorms. waves subsiding to 5 to 8 feet occasionally to
10 feet. 
.monday...northeast winds 15 to 25 knots increasing to gales to
40 knots. rain showers and a chance of thunderstorms. waves
subsiding to 3 to 6 feet occasionally to 8 feet, then building to
10 to 14 feet occasionally to 18 feet. 
.tuesday...north gales to 40 knots becoming northwest gales to
35 knots. rain showers likely. waves subsiding to 4 to 7 feet
occasionally to 9 feet. 

$$