fzus63 kmqt 272001
glfls 
expires:202604280800;;629358

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon apr 27 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 29.5 inch low over southeast minnesota continues northeast this 
afternoon, reaching the upper peninsula late this evening and 
crosses the lake at 29.4 inches by early tuesday morning. the low 
reaches james bay tuesday afternoon while 30.1 inch high pressure 
builds over the canadian prairie. as the low departs northeast, the 
high builds to 30.2 inches while a 29.8 inch low passes south of the 
lower great lakes wednesday. by thursday night, the 30.2 inch high 
will span from hudson bay to the central plains while low pressure 
of 29.5 inches will be off cape cod. the high then shifts directly 
over lake superior by saturday ahead of the arrival of a weak trough 
saturday night into sunday.



lsz162-280800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt mon apr 27 2026 /301 pm cdt mon apr 27 2026/

.late this afternoon...northeast winds 10 to 20 knots. rain
showers. waves 3 to 5 feet occasionally to 7 feet. 
.tonight...east winds 10 to 20 knots becoming west 15 to 25 knots
after midnight, then increasing to 20 to 30 knots late. rain
showers through midnight, then a chance of rain showers after
midnight. waves building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...west winds 20 to 30 knots diminishing to 10 to
20 knots late. a slight chance of rain showers through early
afternoon. waves building to 5 to 8 feet occasionally to 10 feet,
then subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 10 to 20 knots. waves subsiding
to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...north winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.thursday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.friday...north winds 5 to 15 knots backing northwest. waves calm
to 2 feet. 
.saturday...south winds 5 to 15 knots veering west. waves calm to
2 feet. 

$$

fzus63 kmqt 272001
glfls 
expires:202604280800;;629359

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon apr 27 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 29.5 inch low over southeast minnesota continues northeast this 
afternoon, reaching the upper peninsula late this evening and 
crosses the lake at 29.4 inches by early tuesday morning. the low 
reaches james bay tuesday afternoon while 30.1 inch high pressure 
builds over the canadian prairie. as the low departs northeast, the 
high builds to 30.2 inches while a 29.8 inch low passes south of the 
lower great lakes wednesday. by thursday night, the 30.2 inch high 
will span from hudson bay to the central plains while low pressure 
of 29.5 inches will be off cape cod. the high then shifts directly 
over lake superior by saturday ahead of the arrival of a weak trough 
saturday night into sunday.



lsz263-280800-
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 mon apr 27 2026

...gale warning in effect from late tonight through tuesday
afternoon...

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

$$