fzus63 kmqt 052001
glfls 
expires:202606060800;;237696

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jun 5 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... 

29.7 inch low over northern ontario is extending 29.8 inch troughing 
over the lake this afternoon. the low moves slowly east along the 
northern shores of the lake the rest of the afternoon and evening 
while deepening to 29.6 inches. by early saturday morning, it tracks 
into quebec and then southeastwards towards the st. lawrence seaway. 
meanwhile, weak 29.9 inch ridging moves over lake superior saturday 
afternoon as a 29.3 inch low pressure forms over the rockies. 
ridging over lake superior builds to 30.1 inches by sunday as the 
colorado low weakens to 29.4 inches and moves into the western 
dakotas. by monday afternoon, expect lake superior to be between a 
29.8 inch trough over minnesota and 30.2 inch high pressure over new 
england. the troughing weakens to 29.9 inches before moving over 
lake superior on tuesday. pressure continues to fall over lake 
superior through wednesday as a second colorado low moves in, 
reaching 29.6 inches by late wednesday.




lsz162-060800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt fri jun 5 2026 /301 pm cdt fri jun 5 2026/

.late this afternoon...southwest winds 5 to 15 knots. areas of
dense fog. a slight chance of showers and thunderstorms. waves
calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight. a slight chance of showers and thunderstorms through
midnight. patchy fog. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots backing southwest in the
afternoon, then backing east late. patchy fog through early
afternoon. waves calm to 2 feet. 
.saturday night...northeast winds 5 to 15 knots. waves calm to
2 feet. 
.sunday...northeast winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. waves building to 2 to 4 feet. 
.sunday night...northeast winds 10 to 20 knots. waves subsiding
to 1 to 3 feet. 
.monday...northeast winds 10 to 20 knots. a chance of showers
through early afternoon. a chance of thunderstorms. showers by
mid afternoon. waves subsiding to calm to 2 feet. 
.monday night...northeast winds 5 to 15 knots. showers likely
through midnight. a chance of thunderstorms. a chance of showers
after midnight. waves calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots veering east. waves calm
to 2 feet. 
.wednesday...northeast winds 10 to 20 knots. a chance of showers.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 052001
glfls 
expires:202606060800;;237697

open lake forecast for lake superior
national weather service marquette mi
401 pm edt fri jun 5 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... 

29.7 inch low over northern ontario is extending 29.8 inch troughing 
over the lake this afternoon. the low moves slowly east along the 
northern shores of the lake the rest of the afternoon and evening 
while deepening to 29.6 inches. by early saturday morning, it tracks 
into quebec and then southeastwards towards the st. lawrence seaway. 
meanwhile, weak 29.9 inch ridging moves over lake superior saturday 
afternoon as a 29.3 inch low pressure forms over the rockies. 
ridging over lake superior builds to 30.1 inches by sunday as the 
colorado low weakens to 29.4 inches and moves into the western 
dakotas. by monday afternoon, expect lake superior to be between a 
29.8 inch trough over minnesota and 30.2 inch high pressure over new 
england. the troughing weakens to 29.9 inches before moving over 
lake superior on tuesday. pressure continues to fall over lake 
superior through wednesday as a second colorado low moves in, 
reaching 29.6 inches by late wednesday.




lsz263-060800-
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 fri jun 5 2026

...dense fog advisory in effect until 11 am edt saturday...

.late this afternoon...southwest winds 5 to 15 knots. areas of
dense fog. a slight chance of showers and thunderstorms. waves
calm to 2 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight. a slight chance of rain showers through midnight.
patchy dense fog. waves calm to 2 feet. 
.saturday...west winds less than 10 knots backing southwest in
the afternoon, then increasing to 5 to 15 knots late. patchy fog.
waves calm to 2 feet. 
.saturday night...east winds 5 to 15 knots. waves calm to 2 feet.
.sunday...east winds 5 to 15 knots becoming northeast 10 to
20 knots by mid afternoon. waves building to 2 to 4 feet. 
.sunday night...east winds 10 to 20 knots becoming southeast 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.monday...east winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. a chance of showers. waves building to 2 to
4 feet. 
.monday night...southeast winds 5 to 15 knots. showers likely and
a chance of thunderstorms. waves subsiding to 1 to 3 feet. 
.tuesday...northeast winds 5 to 15 knots veering east. waves
subsiding to calm to 2 feet. 
.wednesday...east winds 5 to 15 knots veering southeast. a chance
of showers. waves building to 1 to 3 feet. 

$$