fzus63 kmqt 190201
glfls 
expires:202605190800;;798752

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon may 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... 

a 29.6 inch low lifting from the central plains this evening reaches 
lake superior by tuesday morning. afterwards, a 30.2 inch high over 
the northern plains builds to 30.4 inches tuesday night into 
wednesday as it tracks eastward into the upper great lakes. the high 
pressure shifts east on thursday while leaving lingering ridging of 
at least 30.2 inches over lake superior into friday. a 29.9 inch low 
lifts into the lower great lakes from the southern plains on 
saturday, but 30.1 inch ridging persists over lake superior.



lsz162-190800-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
1001 pm edt mon may 18 2026 /901 pm cdt mon may 18 2026/

.rest of tonight...northeast winds 15 to 25 knots backing north
late. patchy fog. a chance of rain showers by midnight. a chance
of thunderstorms. rain showers likely after midnight. waves 2 to
4 feet building to 3 to 6 feet occasionally to 8 feet. 
.tuesday...west winds 10 to 20 knots. a slight chance of rain
showers through early afternoon. waves subsiding to 1 to 3 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots backing south by mid
afternoon. waves calm to 2 feet. 
.wednesday night...southeast winds 5 to 15 knots becoming south
less than 10 knots after midnight. waves calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.thursday night...east winds 5 to 15 knots. waves calm to 2 feet.
.friday...east winds 10 to 20 knots backing northeast. a chance
of rain showers. waves building to 2 to 4 feet, then subsiding to
calm to 2 feet. 
.saturday...northeast winds 10 to 20 knots diminishing to 5 to
15 knots. a chance of rain showers. waves building to 1 to
3 feet, then subsiding to calm to 2 feet. 

$$

fzus63 kmqt 190201
glfls 
expires:202605190800;;798753

open lake forecast for lake superior
national weather service marquette mi
1001 pm edt mon may 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... 

a 29.6 inch low lifting from the central plains this evening reaches 
lake superior by tuesday morning. afterwards, a 30.2 inch high over 
the northern plains builds to 30.4 inches tuesday night into 
wednesday as it tracks eastward into the upper great lakes. the high 
pressure shifts east on thursday while leaving lingering ridging of 
at least 30.2 inches over lake superior into friday. a 29.9 inch low 
lifts into the lower great lakes from the southern plains on 
saturday, but 30.1 inch ridging persists over lake superior.



lsz263-190800-
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-
1001 pm edt mon may 18 2026

.rest of tonight...northeast winds 15 to 25 knots. patchy fog. a
chance of rain showers by midnight. a chance of thunderstorms.
rain showers after midnight. waves 2 to 4 feet building to 3 to
6 feet occasionally to 8 feet. 
.tuesday...north winds 10 to 20 knots backing west in the
afternoon. patchy fog through early afternoon. a chance of rain
showers through early afternoon. waves subsiding to 2 to 4 feet. 
.tuesday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. waves subsiding to calm to 2 feet. 
.wednesday...northwest winds 5 to 15 knots becoming south 10 to
20 knots by mid afternoon. waves building to 1 to 3 feet. 
.wednesday night...south winds 5 to 15 knots. waves subsiding to
calm to 2 feet. 
.thursday...south winds 5 to 15 knots backing east by mid
afternoon. waves calm to 2 feet. 
.thursday night...southeast winds 5 to 15 knots veering south
after midnight. waves calm to 2 feet. 
.friday...east winds 10 to 20 knots. waves building to 2 to
4 feet, then subsiding to calm to 2 feet. 
.saturday...east winds 5 to 15 knots. a chance of rain showers.
waves building to 1 to 3 feet, then subsiding to calm to 2 feet. 

$$