fzus63 kmqt 152001
glfls 
expires:202606160800;;803711

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon jun 15 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 northern ontario this afternoon brings 29.7 
inch troughing over lake superior, with the troughing deepening to 
29.6 inches by this evening as the parent low continues towards 
james bay. the troughing deepens into a 29.5 inch low over northeast 
wisconsin and the u.p. on tuesday before slowly moving east-
northeast into ontario tuesday night into early wednesday morning. a 
low of 29.2 inches over the northern plains on wednesday morning 
then moves through lower michigan wednesday night before arriving 
into southern ontario early thursday morning. a 30.0 inch high then 
develops over the plains thursday night before diving into the mid-
mississippi valley friday night; this brings 29.9 inch ridging over 
lake superior by friday. the ridging strengthen slightly to around 
30.0 inches over lake superior by saturday as the parent high 
meanders into the ohio river valley. 




lsz162-160800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
401 pm edt mon jun 15 2026 /301 pm cdt mon jun 15 2026/

.late this afternoon...southwest winds 15 to 25 knots. a chance
of showers and a slight chance of thunderstorms. waves 2 to
4 feet. 
.tonight...southwest winds 5 to 15 knots veering west after
midnight, then veering north late. a slight chance of
thunderstorms through midnight. a chance of rain showers. waves
subsiding to calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots veering south in the
afternoon, then veering southwest late. a slight chance of rain
showers through early afternoon. waves calm to 2 feet. 
.tuesday night...south winds 5 to 15 knots becoming north less
than 10 knots after midnight, then veering east late. a slight
chance of rain showers after midnight. waves calm to 2 feet. 
.wednesday...east winds 10 to 20 knots increasing to 15 to
25 knots by mid afternoon. a slight chance of rain showers
through early afternoon, then rain showers likely by mid
afternoon. waves building to 2 to 4 feet. 
.wednesday night...northeast winds 15 to 25 knots becoming north
10 to 20 knots after midnight. a chance of rain showers. waves
subsiding to 1 to 3 feet, then building to 2 to 4 feet. 
.thursday...west winds 10 to 20 knots. waves subsiding to calm to
2 feet. 
.thursday night...west winds 10 to 20 knots veering northwest
after midnight. waves calm to 2 feet. 
.friday...west winds 10 to 20 knots diminishing to 5 to 15 knots.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 
.saturday...west winds 5 to 15 knots veering north. waves calm to
2 feet. 

$$

fzus63 kmqt 152001
glfls 
expires:202606160800;;803712

open lake forecast for lake superior
national weather service marquette mi
401 pm edt mon jun 15 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 northern ontario this afternoon brings 29.7 
inch troughing over lake superior, with the troughing deepening to 
29.6 inches by this evening as the parent low continues towards 
james bay. the troughing deepens into a 29.5 inch low over northeast 
wisconsin and the u.p. on tuesday before slowly moving east-
northeast into ontario tuesday night into early wednesday morning. a 
low of 29.2 inches over the northern plains on wednesday morning 
then moves through lower michigan wednesday night before arriving 
into southern ontario early thursday morning. a 30.0 inch high then 
develops over the plains thursday night before diving into the mid-
mississippi valley friday night; this brings 29.9 inch ridging over 
lake superior by friday. the ridging strengthen slightly to around 
30.0 inches over lake superior by saturday as the parent high 
meanders into the ohio river valley. 




lsz263-160800-
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 jun 15 2026

.late this afternoon...southwest winds 15 to 25 knots. a chance
of showers and a slight chance of thunderstorms. waves 3 to
5 feet occasionally to 7 feet subsiding to 2 to 4 feet. 
.tonight...southwest winds 5 to 15 knots veering north late. a
slight chance of thunderstorms through midnight. a chance of rain
showers. waves subsiding to calm to 2 feet. 
.tuesday...northeast winds 5 to 15 knots veering southwest late.
a slight chance of rain showers through early afternoon. waves
calm to 2 feet. 
.tuesday night...southwest winds 5 to 15 knots diminishing to
less than 10 knots after midnight, then backing south late. waves
calm to 2 feet. 
.wednesday...southeast winds 5 to 15 knots becoming east 10 to
20 knots by mid afternoon. a slight chance of rain showers
through early afternoon. rain showers likely by mid afternoon.
waves calm to 2 feet. 
.wednesday night...northeast winds 10 to 20 knots backing north
after midnight. a chance of rain showers. waves building to 2 to
4 feet, then subsiding to 1 to 3 feet. 
.thursday...west winds 5 to 15 knots increasing to 10 to 20 knots
by mid afternoon. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.thursday night...west winds 10 to 20 knots becoming northwest
5 to 15 knots after midnight. waves 1 to 3 feet. 
.friday...west winds 10 to 20 knots. waves subsiding to calm to
2 feet, then building to 2 to 4 feet. 
.saturday...west winds 5 to 15 knots. waves calm to 2 feet. 

$$