fzus63 kmqt 270801
glfls 
expires:202604272000;;599713

open lake forecast for lake superior
national weather service marquette mi
401 am 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...

this morning, lake superior is between a 30.3 inch high over quebec 
and a 29.5 inch low over oklahoma. throughout today, this low moves 
northeast, 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 further moves 
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 late saturday into sunday.



lsz162-272000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 am edt mon apr 27 2026 /301 am cdt mon apr 27 2026/

...dense fog advisory in effect until 8 am edt /7 am cdt/ this
morning...

.early this morning...northeast winds 15 to 25 knots. patchy
dense fog. a slight chance of rain showers. waves 2 to 4 feet
building to 3 to 5 feet occasionally to 7 feet. 
.today...northeast winds 15 to 25 knots. rain showers. waves
building to 3 to 6 feet occasionally to 8 feet. 
.tonight...northeast winds 10 to 20 knots becoming northwest
15 to 25 knots after midnight, then becoming west 20 to 30 knots
late. rain showers through midnight, then a chance of rain
showers after midnight. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.tuesday...west winds 20 to 30 knots diminishing to 10 to
20 knots late. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 5 to 15 knots. waves subsiding
to calm to 2 feet. 
.wednesday...west winds 5 to 15 knots backing southwest by mid
afternoon. waves calm to 2 feet. 
.wednesday night...north winds 5 to 15 knots. waves calm to
2 feet. 
.thursday...northeast winds 5 to 15 knots backing north. waves
calm to 2 feet. 
.friday...southeast winds 5 to 15 knots veering northwest. waves
calm to 2 feet. 

$$