fzus63 kmqt 190801
glfls 
expires:202606192000;;004431

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jun 19 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... 

weak surface ridging this morning gives way to another 29.8 inch 
trough moving through northern wi this evening. ridging over the mid-
mississippi valley builds to 30.0 inches tonight into saturday, 
supporting weak 29.9 inches ridging over lake superior by saturday 
afternoon. ridging continues into monday, when it builds to 30.1 
inches and then 30.2 inches by tuesday morning. a weak 30.0 inch low 
moves through the great lakes wednesday. 




lsz162-192000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
400 am edt fri jun 19 2026 /300 am cdt fri jun 19 2026/

.early this morning...west winds 5 to 15 knots. waves calm to
2 feet. 
.today...west winds 5 to 15 knots backing southwest in the
afternoon. a chance of showers and a slight chance of
thunderstorms by mid afternoon. waves calm to 2 feet. 
.tonight...west winds 5 to 15 knots. a slight chance of rain
showers. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots backing southwest late. a
slight chance of showers through early afternoon. waves calm to
2 feet. 
.saturday night...west winds 5 to 15 knots becoming northwest
less than 10 knots after midnight. waves calm to 2 feet. 
.sunday...southwest winds less than 10 knots becoming east 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots diminishing to less
than 10 knots after midnight. waves calm to 2 feet. 
.monday...northeast winds 5 to 15 knots becoming north less than
10 knots. waves calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots. a chance of rain
showers. waves calm to 2 feet. 

$$

fzus63 kmqt 190801
glfls 
expires:202606192000;;004432

open lake forecast for lake superior
national weather service marquette mi
400 am edt fri jun 19 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... 

weak surface ridging this morning gives way to another 29.8 inch 
trough moving through northern wi this evening. ridging over the mid-
mississippi valley builds to 30.0 inches tonight into saturday, 
supporting weak 29.9 inches ridging over lake superior by saturday 
afternoon. ridging continues into monday, when it builds to 30.1 
inches and then 30.2 inches by tuesday morning. a weak 30.0 inch low 
moves through the great lakes wednesday. 




lsz263-192000-
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-
400 am edt fri jun 19 2026

.early this morning...west winds 5 to 15 knots. waves 1 to 3 feet
subsiding to calm to 2 feet. 
.today...west winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. waves building to 1 to 3 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then diminishing to less than 10 knots late. a slight
chance of rain showers. waves subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots backing southwest late. a
slight chance of rain showers. waves calm to 2 feet. 
.saturday night...west winds less than 10 knots. waves calm to
2 feet. 
.sunday...west winds less than 10 knots becoming northeast 5 to
15 knots by mid afternoon. waves calm to 2 feet. 
.sunday night...northeast winds 5 to 15 knots backing north after
midnight. waves calm to 2 feet. 
.monday...north winds 5 to 15 knots backing west. waves calm to
2 feet. 
.tuesday...northeast winds less than 10 knots becoming east 5 to
15 knots. waves calm to 2 feet. 

$$