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fzus63 kmqt 210234
glfls 
552 

open lake forecast for lake superior
national weather service marquette mi
934 pm est wed jan 20 2021

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 29.1 inch low in ontario tracks southeast along the
northern shore of lake superior overnight while weakening to 29.2
inches. this low will continue moving east and remain north of 
lake superior wednesday night while weakening further to 29.2 
inches by thursday morning. by thursday night, the low shifts 
southeast across new england while weakening to 29.5 inches. 
ridging of 30.2 inches builds over lake superior on friday and 
strengthens to 30.4 inches on saturday as the ridge axis moves 
over lake superior. weak 30.1 inch troughing moves over lake 
superior on sunday followed by 30.2 inch ridging on monday. 

lsz162-211045-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
934 pm est wed jan 20 2021 /834 pm cst wed jan 20 2021/

...gale warning in effect through thursday evening...

.rest of tonight...west gales to 40 knots. waves 9 to 12 feet
occasionally to 15 feet subsiding to 6 to 9 feet occasionally to
11 feet. 
.thursday...west gales to 35 knots veering northwest. a slight
chance of snow showers in the morning. freezing spray in the
afternoon. waves subsiding to 4 to 7 feet occasionally to 9 feet.
.thursday night...northwest winds 20 to 30 knots diminishing to
15 to 25 knots late. freezing spray. a slight chance of snow
showers after midnight. waves subsiding to 3 to 5 feet
occasionally to 7 feet. 
.friday...northwest winds 10 to 20 knots. freezing spray in the 
morning. a chance of snow showers. waves subsiding to calm to 2 
feet. 
.friday night...northwest winds 5 to 15 knots backing west after
midnight. waves calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots becoming south 10 to
20 knots in the afternoon. waves calm to 2 feet. 
.saturday night...south winds 10 to 20 knots veering southwest
after midnight. a chance of snow. waves building to 1 to 3 feet. 
.sunday...west winds 5 to 15 knots becoming north 10 to 20 knots.
waves subsiding to calm to 2 feet. 
.monday...north winds 10 to 20 knots. waves building to 1 to
3 feet. 

$$
fzus63 kmqt 210234
glfls 

lsz263-211045-
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-
934 pm est wed jan 20 2021

...gale warning in effect through thursday evening...

.rest of tonight...west gales to 45 knots. waves 10 to 14 feet
occasionally to 18 feet building to 11 to 15 feet occasionally to
19 feet, then subsiding to 10 to 14 feet occasionally to 18 feet.
.thursday...west gales to 40 knots becoming northwest gales to 40
knots. a chance of snow showers. freezing spray in the afternoon.
waves subsiding to 5 to 8 feet occasionally to 10 feet. 
.thursday night...northwest gales to 35 knots diminishing to
20 to 30 knots by midnight. freezing spray. a chance of snow
showers. waves subsiding to 3 to 5 feet occasionally to 7 feet. 
.friday...northwest winds 15 to 25 knots diminishing to 10 to
20 knots in the afternoon. freezing spray in the morning. a
chance of snow showers. waves subsiding to 1 to 3 feet. 
.friday night...northwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a chance of snow showers. waves
subsiding to calm to 2 feet. 
.saturday...southwest winds 5 to 15 knots backing south in the
afternoon. waves calm to 2 feet. 
.saturday night...south winds 10 to 20 knots. a chance of snow.
waves building to 1 to 3 feet. 
.sunday...west winds 10 to 20 knots veering north. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.monday...north winds 10 to 20 knots. waves building to 2 to
4 feet. 

$$

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