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fzus63 kmqt 201945
glfls 
756 

open lake forecast for lake superior
national weather service marquette mi
345 pm edt sun oct 20 2019

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 29.9 inch ridge over the upper great lakes this 
evening will give way to a an approaching 29.4 inch low over 
the plains. the low will deepen to 29.2 inches monday night 
through tuesday as it crosses western lake superior. the low 
will then weaken late tuesday into wednesday to 29.3 inches as 
it moves northward toward hudson bay. a weak 29.9 inch area of 
low pressure will then cross lake michigan early thursday. a 
30.5 inch high pressure will then move southeast out of the 
canadian rockies into the central plains, extending a 30.1 
inch ridge over the upper great lakes late thursday through 
the early part of the weekend. 

lsz162-210345-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
345 pm edt sun oct 20 2019 /245 pm cdt sun oct 20 2019/

...gale warning in effect from monday afternoon through monday
evening...

.late this afternoon...east winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots increasing to 10 to 20 knots
after midnight. a chance of showers. waves building to 3 to
5 feet occasionally to 7 feet. 
.monday...east winds 20 to 30 knots increasing to gales to
40 knots in the afternoon. a chance of showers through early
afternoon, then showers and a slight chance of thunderstorms by
mid afternoon. waves building to 10 to 14 feet occasionally to
18 feet. 
.monday night...east gales to 40 knots becoming southeast 15 to
25 knots after midnight, then becoming south 10 to 20 knots late.
showers likely through midnight, then a chance of showers after
midnight. waves building to 11 to 15 feet occasionally to
19 feet, then subsiding to 3 to 6 feet occasionally to 8 feet. 
.tuesday...west winds 15 to 25 knots increasing to 20 to 30 knots
by mid afternoon. showers. waves subsiding to 2 to 4 feet, then
building to 4 to 7 feet occasionally to 9 feet. 
.tuesday night...west winds 20 to 30 knots. a chance of rain
showers. waves subsiding to 3 to 6 feet occasionally to 8 feet. 
.wednesday...west winds 15 to 25 knots. waves subsiding to 3 to
5 feet occasionally to 7 feet. 
.wednesday night...northwest winds 10 to 20 knots. waves
subsiding to 1 to 3 feet. 
.thursday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 2 to 4 feet, then subsiding to calm
to 2 feet. 
.friday...west winds 10 to 20 knots becoming southwest 5 to
15 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 2 to 4 feet. 

$$
fzus63 kmqt 201945
glfls 

lsz263-210345-
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-
345 pm edt sun oct 20 2019

...gale warning in effect from monday afternoon through monday
evening...

.late this afternoon...south winds 5 to 15 knots. waves calm to
2 feet. 
.tonight...east winds 5 to 15 knots. sprinkles after midnight.
waves building to 1 to 3 feet. 
.monday...east winds 15 to 25 knots increasing to gales to
45 knots in the afternoon. a chance of showers through early
afternoon, then showers and a slight chance of thunderstorms by
mid afternoon. waves building to 11 to 15 feet occasionally to
19 feet. 
.monday night...east gales to 45 knots becoming south gales to
35 knots after midnight, then diminishing to 15 to 25 knots late.
a chance of showers. waves building to 15 to 20 feet occasionally
to 25 feet, then subsiding to 5 to 8 feet occasionally to
10 feet. 
.tuesday...south winds 10 to 20 knots becoming west 20 to
30 knots by mid afternoon. showers. waves subsiding to 2 to
4 feet, then building to 4 to 7 feet occasionally to 9 feet. 
.tuesday night...west winds 20 to 30 knots. rain showers likely
through midnight, then a chance of rain showers after midnight.
waves building to 6 to 9 feet occasionally to 11 feet. 
.wednesday...west winds 20 to 30 knots. waves subsiding to 3 to
6 feet occasionally to 8 feet. 
.wednesday night...northwest winds 15 to 25 knots diminishing to
10 to 20 knots after midnight. waves subsiding to 2 to 4 feet. 
.thursday...northwest winds 10 to 20 knots diminishing to 5 to
15 knots. waves building to 3 to 5 feet occasionally to 7 feet,
then subsiding to 1 to 3 feet. 
.friday...west winds 10 to 20 knots backing southwest. waves
building to 3 to 5 feet occasionally to 7 feet. 

$$

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