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fzus63 kmqt 202108
glfls 
expires:202001210515;;257558

open lake forecast for lake superior
national weather service marquette mi
408 pm est mon jan 20 2020

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 30.8 inch high over the northern plains will weaken
to 30.5 inches as it drifts southeast into the ohio valley 
tonight and tomorrow. a 29.4 inch low will transit across 
northern ontario, reaching hudson bay wednesday. this low will 
swing a weak 29.9 inch trough across lake superior wednesday 
evening into thursday. by early friday, a 30.5 inch high will 
build in across eastern ontario while extending a 30.3 inch ridge 
across the region.


lsz162-210515-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
408 pm est mon jan 20 2020 /308 pm cst mon jan 20 2020/

...heavy freezing spray warning in effect from 10 pm est /9 pm
cst/ this evening through tuesday afternoon...
...gale warning in effect from tuesday morning through wednesday
morning...

.late this afternoon...west winds 10 to 20 knots. waves calm to
2 feet. 
.tonight...west winds 10 to 20 knots increasing to 15 to 25 knots
by midnight, then becoming southwest 20 to 30 knots late. heavy
freezing spray. waves building to 7 to 10 feet occasionally to
13 feet. 
.tuesday...southwest gales to 35 knots. heavy freezing spray.
waves building to 8 to 11 feet occasionally to 14 feet. 
.tuesday night...southwest gales to 35 knots. freezing spray.
waves subsiding to 7 to 10 feet occasionally to 13 feet. 
.wednesday...southwest gales to 35 knots diminishing to 15 to
25 knots in the afternoon. a slight chance of freezing drizzle
and snow in the morning. a slight chance of drizzle. waves
subsiding to 6 to 9 feet occasionally to 11 feet. 
.wednesday night...southwest winds 5 to 15 knots backing south
after midnight. a chance of drizzle. waves subsiding to 5 to
8 feet occasionally to 10 feet. 
.thursday...northeast winds 10 to 20 knots veering east in the
afternoon. a chance of drizzle and snow. waves subsiding to 4 to
7 feet occasionally to 9 feet. 
.thursday night...east winds 10 to 20 knots. a chance of drizzle
in the evening. a chance of snow. waves 4 to 7 feet occasionally
to 9 feet. 
.friday...east winds 5 to 15 knots backing northeast. a chance of
snow. a chance of rain. waves subsiding to 3 to 6 feet
occasionally to 8 feet. 
.saturday...northeast winds less than 10 knots veering southwest.
waves subsiding to 3 to 5 feet occasionally to 7 feet. 

$$
fzus63 kmqt 202108
glfls 
expires:202001210515;;257559

open lake forecast for lake superior
national weather service marquette mi
408 pm est mon jan 20 2020

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 30.8 inch high over the northern plains will weaken
to 30.5 inches as it drifts southeast into the ohio valley 
tonight and tomorrow. a 29.4 inch low will transit across 
northern ontario, reaching hudson bay wednesday. this low will 
swing a weak 29.9 inch trough across lake superior wednesday 
evening into thursday. by early friday, a 30.5 inch high will 
build in across eastern ontario while extending a 30.3 inch ridge 
across the region.


lsz263-210515-
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-
408 pm est mon jan 20 2020

...heavy freezing spray warning in effect from 10 pm est this
evening through tuesday afternoon...
...gale warning in effect from 1 am est tuesday through wednesday
morning...

.late this afternoon...west winds 10 to 20 knots. waves 1 to
3 feet. 
.tonight...west winds 15 to 25 knots increasing to gales to
35 knots. freezing spray. waves building to 8 to 11 feet
occasionally to 14 feet. 
.tuesday...southwest gales to 40 knots. freezing spray. waves
building to 10 to 14 feet occasionally to 18 feet. 
.tuesday night...southwest gales to 40 knots. waves subsiding to
8 to 11 feet occasionally to 14 feet, then building to 9 to
12 feet occasionally to 15 feet. 
.wednesday...southwest gales to 35 knots diminishing to 15 to
25 knots in the afternoon. a slight chance of freezing drizzle in
the morning. a chance of snow and drizzle. waves subsiding to
3 to 6 feet occasionally to 8 feet. 
.wednesday night...southwest winds 10 to 20 knots diminishing to
5 to 15 knots after midnight. a chance of drizzle and snow. waves
subsiding to calm to 2 feet. 
.thursday...northeast winds 10 to 20 knots increasing to 15 to
25 knots in the afternoon. a chance of drizzle, snow and freezing
drizzle. waves building to 1 to 3 feet. 
.thursday night...northeast winds 15 to 25 knots veering east
after midnight. a chance of rain and drizzle in the evening. a
chance of snow. waves building to 2 to 4 feet. 
.friday...east winds 10 to 20 knots becoming northeast 5 to
15 knots. a chance of snow, possibly mixed with rain. waves
subsiding to calm to 2 feet. 
.saturday...northeast winds 5 to 15 knots backing north. waves
calm to 2 feet. 

$$

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