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fzus63 kmqt 290753
glfls 
expires:202303291600;;854315

open lake forecast for lake superior
national weather service marquette mi
353 am edt wed mar 29 2023

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...this morning, a 29.9 inch low is over northeast ontario 
while a 30.5 inch high is over north dakota. by this afternoon, the 
low will deepen to 29.7 inches over western quebec while the high 
will weaken to 30.4 inches over southern minnesota. overnight into 
thursday, the high will settle over lake michigan, further weakening 
to 30.3 inches. as the high drifts east thursday, a 29.3 inch 
colorado low forms. throughout the day friday, this low deepens to 
29.2 inches, reaching southern wisconsin friday night and lake huron 
saturday morning. 30.1 inch ridging then builds over lake superior 
saturday while a 29.4 inch alberta clipper low forms. this low will 
weaken to 29.6 inches as it treks east sunday, reaching lake 
superior monday morning. 


lsz162-291600-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
353 am edt wed mar 29 2023 /253 am cdt wed mar 29 2023/

...heavy freezing spray warning in effect until 2 pm edt /1 pm
cdt/ this afternoon...

.early this morning...northwest winds 20 to 30 knots. heavy
freezing spray. waves 3 to 6 feet occasionally to 8 feet. 
.today...northwest winds 15 to 25 knots backing west in the
afternoon. heavy freezing spray. waves subsiding to 2 to 4 feet. 
.tonight...west winds 15 to 25 knots. waves building to 3 to
5 feet occasionally to 7 feet, then subsiding to 2 to 4 feet. 
.thursday...southwest winds 10 to 20 knots. a slight chance of
snow by mid afternoon. waves subsiding to 1 to 3 feet. 
.thursday night...east winds 10 to 20 knots becoming northeast
15 to 25 knots after midnight. a chance of snow, possibly mixed
with sleet through midnight. a slight chance of rain. snow likely
after midnight. waves subsiding to calm to 2 feet, then building
to 3 to 6 feet occasionally to 8 feet. 
.friday...northeast winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a chance of snow. waves building to
7 to 10 feet occasionally to 13 feet. 
.friday night...northeast gales to 40 knots backing north after
midnight. freezing spray after midnight. waves building to 10 to
14 feet occasionally to 18 feet. 
.saturday...north winds 20 to 30 knots becoming south 10 to
20 knots. waves subsiding to calm to 2 feet, then building to
1 to 3 feet. 
.sunday...southeast winds 15 to 25 knots veering west. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 

$$
fzus63 kmqt 290753
glfls 
expires:202303291600;;854316

open lake forecast for lake superior
national weather service marquette mi
353 am edt wed mar 29 2023

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...this morning, a 29.9 inch low is over northeast ontario 
while a 30.5 inch high is over north dakota. by this afternoon, the 
low will deepen to 29.7 inches over western quebec while the high 
will weaken to 30.4 inches over southern minnesota. overnight into 
thursday, the high will settle over lake michigan, further weakening 
to 30.3 inches. as the high drifts east thursday, a 29.3 inch 
colorado low forms. throughout the day friday, this low deepens to 
29.2 inches, reaching southern wisconsin friday night and lake huron 
saturday morning. 30.1 inch ridging then builds over lake superior 
saturday while a 29.4 inch alberta clipper low forms. this low will 
weaken to 29.6 inches as it treks east sunday, reaching lake 
superior monday morning. 


lsz263-291600-
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-
353 am edt wed mar 29 2023

...heavy freezing spray warning in effect until 2 pm edt this
afternoon...

.early this morning...northwest winds 20 to 30 knots. freezing
spray. a slight chance of snow showers. waves 3 to 6 feet
occasionally to 8 feet. 
.today...northwest winds 20 to 30 knots backing west in the
afternoon, then diminishing to 15 to 25 knots late. heavy
freezing spray. waves building to 4 to 7 feet occasionally to
9 feet, then subsiding to 3 to 5 feet occasionally to 7 feet. 
.tonight...west winds 15 to 25 knots. a slight chance of snow
through midnight. freezing spray. waves building to 4 to 7 feet
occasionally to 9 feet. 
.thursday...west winds 15 to 25 knots backing southwest in the
afternoon. freezing spray through early afternoon. waves
subsiding to 2 to 4 feet. 
.thursday night...east winds 10 to 20 knots increasing to 15 to
25 knots after midnight. a chance of snow through midnight. a
slight chance of rain. snow likely after midnight. waves
subsiding to calm to 2 feet, then building to 1 to 3 feet. 
.friday...northeast winds 20 to 30 knots increasing to gales to
35 knots by mid afternoon. a chance of snow. waves building to
7 to 10 feet occasionally to 13 feet. 
.friday night...northeast gales to 45 knots becoming north storm
force winds to 55 knots after midnight. freezing spray after
midnight. waves building to 15 to 20 feet occasionally to
25 feet. 
.saturday...north gales to 45 knots becoming south 10 to
20 knots. freezing spray. waves subsiding to calm to 2 feet, then
building to 1 to 3 feet. 
.sunday...south winds 15 to 25 knots veering southwest. waves
building to 2 to 4 feet. 

$$
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