fzus63 kmqt 161401
glfls 
expires:202604162000;;466719

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu apr 16 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 ridging of around 29.8 inches persists over lake superior today 
and tonight, then expect height falls into friday morning before 
troughing averaging 29.5 inches moves across the lake friday evening 
and saturday morning. ridging builds over lake superior the 
remainder of saturday and throughout sunday, reaching about 30.3 
inches monday morning. this gives way quickly to troughing monday 
evening as a low swings southeast through ontario toward james bay, 
decreasing to around 29.6 by monday evening.



lsz263-162000-
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-
1000 am edt thu apr 16 2026

...dense fog advisory in effect until 8 pm edt this evening...

.rest of today...southwest winds less than 10 knots increasing to
5 to 15 knots in the afternoon, then backing east late. areas of
dense fog. waves calm to 2 feet. 
.tonight...east winds 5 to 15 knots. patchy fog. a slight chance
of rain showers after midnight. waves building to 1 to 3 feet. 
.friday...east winds 10 to 20 knots becoming south 15 to 25 knots
late. patchy fog through early afternoon. a chance of showers and
thunderstorms by mid afternoon. waves building to 3 to 5 feet
occasionally to 7 feet. 
.friday night...west winds 20 to 30 knots. rain showers likely
and a slight chance of thunderstorms through midnight, then a
slight chance of rain showers, snow showers and sleet after
midnight. waves building to 5 to 8 feet occasionally to 10 feet. 
.saturday...west winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. waves building to 7 to 10 feet
occasionally to 13 feet. 
.saturday night...northwest gales to 35 knots. waves subsiding to
4 to 7 feet occasionally to 9 feet. 
.sunday...northwest winds 20 to 30 knots diminishing to 10 to
20 knots. waves subsiding to calm to 2 feet. 
.monday...south winds 10 to 20 knots increasing to 15 to
25 knots. waves building to 3 to 6 feet occasionally to 8 feet. 

$$

fzus63 kmqt 161401
glfls 
expires:202604162000;;466718

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu apr 16 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 ridging of around 29.8 inches persists over lake superior today 
and tonight, then expect height falls into friday morning before 
troughing averaging 29.5 inches moves across the lake friday evening 
and saturday morning. ridging builds over lake superior the 
remainder of saturday and throughout sunday, reaching about 30.3 
inches monday morning. this gives way quickly to troughing monday 
evening as a low swings southeast through ontario toward james bay, 
decreasing to around 29.6 by monday evening.



lsz162-162000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt thu apr 16 2026 /900 am cdt thu apr 16 2026/

...dense fog advisory in effect until 8 pm edt /7 pm cdt/ this
evening...

.rest of today...southwest winds 5 to 15 knots backing east late.
areas of dense fog by late morning, then patchy fog by mid
afternoon. waves calm to 2 feet. 
.tonight...northeast winds 10 to 20 knots. patchy fog. a slight
chance of rain and snow showers after midnight. waves building to
1 to 3 feet. 
.friday...east winds 10 to 20 knots backing northeast in the
afternoon, then backing northwest late. patchy fog through early
afternoon. rain showers and a chance of thunderstorms by mid
afternoon. waves 1 to 3 feet. 
.friday night...west winds 15 to 25 knots increasing to 20 to
30 knots after midnight. a chance of rain showers, possibly mixed
with snow and thunderstorms through midnight. waves building to
3 to 5 feet occasionally to 7 feet. 
.saturday...west winds 20 to 30 knots. waves building to 3 to
6 feet occasionally to 8 feet. 
.saturday night...northwest winds 15 to 25 knots. waves subsiding
to 1 to 3 feet. 
.sunday...northwest winds 10 to 20 knots becoming north 5 to
15 knots. waves subsiding to calm to 2 feet. 
.monday...south winds 5 to 15 knots becoming west 10 to 20 knots.
waves building to 2 to 4 feet, then subsiding to 1 to 3 feet. 

$$