fzus63 kmqt 181401
glfls 
expires:202606182000;;958906

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu jun 18 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... 

29.2 inch low pressure currently over central lower michigan tracks 
into southern quebec by this afternoon. this low slowly fills on 
friday while a 30.0 inch high builds over the upper mississippi 
valley, persisting into saturday. moving into early next week, a 
30.0 inch high pressure over northern canada drops  south over lake 
superior on sunday, increasing to 30.2 inches by monday as the 
parent high strengthens to 30.3 inches as it moves into western 
hudson bay.




lsz162-182000-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1000 am edt thu jun 18 2026 /900 am cdt thu jun 18 2026/

.rest of today...west winds 10 to 20 knots. a slight chance of
showers and thunderstorms by mid afternoon. waves calm to 2 feet.
.tonight...west winds 10 to 20 knots diminishing to 5 to 15 knots
late. waves calm to 2 feet. 
.friday...west winds 5 to 15 knots backing southwest in the
afternoon. a slight chance of showers by mid afternoon. waves
calm to 2 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. a chance of rain showers. waves calm to 2 feet. 
.saturday...west winds 5 to 15 knots. a slight chance of rain
showers. waves calm to 2 feet. 
.saturday night...northwest winds 5 to 15 knots becoming north
less than 10 knots after midnight. waves calm to 2 feet. 
.sunday...east winds 5 to 15 knots becoming north less than
10 knots. waves calm to 2 feet. 
.monday...north winds less than 10 knots. waves calm to 2 feet. 

$$

fzus63 kmqt 181401
glfls 
expires:202606182000;;958907

open lake forecast for lake superior
national weather service marquette mi
1000 am edt thu jun 18 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... 

29.2 inch low pressure currently over central lower michigan tracks 
into southern quebec by this afternoon. this low slowly fills on 
friday while a 30.0 inch high builds over the upper mississippi 
valley, persisting into saturday. moving into early next week, a 
30.0 inch high pressure over northern canada drops  south over lake 
superior on sunday, increasing to 30.2 inches by monday as the 
parent high strengthens to 30.3 inches as it moves into western 
hudson bay.




lsz263-182000-
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 jun 18 2026

.rest of today...west winds 5 to 15 knots increasing to 10 to
20 knots in the afternoon. a slight chance of showers and
thunderstorms by mid afternoon. waves calm to 2 feet building to
1 to 3 feet. 
.tonight...west winds 10 to 20 knots becoming northwest 5 to
15 knots after midnight. waves subsiding to calm to 2 feet. 
.friday...west winds 5 to 15 knots becoming southwest 10 to
20 knots in the afternoon. waves building to 1 to 3 feet. 
.friday night...southwest winds 5 to 15 knots veering west after
midnight. a slight chance of rain showers. waves subsiding to
calm to 2 feet. 
.saturday...west winds 5 to 15 knots. a slight chance of rain
showers. 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...north winds less than 10 knots increasing to 5 to
15 knots. waves calm to 2 feet. 
.monday...north winds 5 to 15 knots backing west. waves calm to
2 feet. 

$$