fzus63 kmqt 270630
glfls 
expires:202607271430;;677496

open lake forecast for lake superior
national weather service marquette mi
230 am edt mon jul 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... 

troughing around 29.8 inches over lake superior deepens to 29.7 
inches by tonight. a 29.6 to 29.7 inch clipper low then moves into 
the upper great lakes or upper midwest by monday before departing 
east towards the mid-atlantic on tuesday. behind the clipper, weak 
ridging of 29.9 to 30.0 inches returns to lake superior tuesday into 
thursday.


lsz162-271430-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
230 am edt mon jul 27 2026 /130 am cdt mon jul 27 2026/

...dense fog advisory in effect until noon edt /11 am cdt/
today...
...severe thunderstorm watch 518 in effect until 10 am edt /9 am
cdt/ this morning...

.rest of tonight...southwest winds 5 to 15 knots veering west
after midnight, then veering northeast late. patchy dense fog and
smoke. a chance of showers and a slight chance of thunderstorms.
some thunderstorms may be severe. waves calm to 2 feet. 
.monday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots in the afternoon. a chance of showers and a slight
chance of thunderstorms through early afternoon. patchy dense fog
early. some thunderstorms may be severe. waves calm to 2 feet. 
.monday night...north winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.tuesday...north winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...northeast winds 5 to 15 knots becoming north
less than 10 knots after midnight. waves calm to 2 feet. 
.wednesday...east winds less than 10 knots increasing to 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.wednesday night...northeast winds 5 to 15 knots diminishing to
less than 10 knots after midnight. waves calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering north. a chance
of showers. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots veering north. waves calm to
2 feet. 

$$

fzus63 kmqt 270630
glfls 
expires:202607271430;;677497

open lake forecast for lake superior
national weather service marquette mi
230 am edt mon jul 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... 

troughing around 29.8 inches over lake superior deepens to 29.7 
inches by tonight. a 29.6 to 29.7 inch clipper low then moves into 
the upper great lakes or upper midwest by monday before departing 
east towards the mid-atlantic on tuesday. behind the clipper, weak 
ridging of 29.9 to 30.0 inches returns to lake superior tuesday into 
thursday.


lsz263-271430-
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-
230 am edt mon jul 27 2026

...dense fog advisory in effect until noon edt today...
...severe thunderstorm watch 518 in effect until 10 am edt this
morning...

.rest of tonight...west winds 5 to 15 knots veering northeast
after midnight. patchy dense fog. patchy smoke after midnight. a 
slight chance of showers and thunderstorms. some thunderstorms may
be severe. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. a slight chance of showers through
early afternoon. patchy dense fog early. waves calm to 2 feet. 
.monday night...north winds 5 to 15 knots backing northwest after
midnight, then becoming north less than 10 knots late. waves calm
to 2 feet. 
.tuesday...northeast winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.tuesday night...east winds less than 10 knots veering southeast
after midnight. waves calm to 2 feet. 
.wednesday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.thursday...southwest winds 5 to 15 knots veering north. a chance
of showers. waves calm to 2 feet. 
.friday...northwest winds 5 to 15 knots backing west. waves calm
to 2 feet. 

$$