fzus63 kmqt 180751
glfls 
expires:202409181600;;784327

open lake forecast for lake superior
national weather service marquette mi
351 am edt wed sep 18 2024

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 30.1 inch high pressure ridge extending from new 
england back into the great lakes region today will reorient from
quebec into the great lakes region for thursday. meanwhile, a 
29.3 inch low pressure over eastern montana today will lift into 
southern manitoba on thursday with its associated 29.6 inch trough
pushing east into western minnesota. as the low continues to 
track northeast to hudson bay during friday, the associated trough
will weaken to 29.8 inches as it reaches western lake superior. 
this trough will then dissipate, allowing weak 30.0 inch ridging 
to setup over the upper great lakes by saturday morning. a new low
pressure of 29.7 inches over southern manitoba saturday morning 
will track into far northern ontario during saturday night with 
its associated 29.9 inch trough sweeping across lake superior. in 
its wake, 30.2 inch high pressure will build into the northern 
plains on sunday.


lsz162-181600-
lake superior west of a line from saxon harbor wi to grand
portage mn beyond 5nm-
351 am edt wed sep 18 2024 /251 am cdt wed sep 18 2024/

.early this morning...south winds 5 to 15 knots. waves calm to
2 feet. 
.today...south winds 5 to 15 knots becoming southeast 10 to
20 knots late. waves calm to 2 feet. 
.tonight...southeast winds 10 to 20 knots veering south after
midnight. a slight chance of showers and thunderstorms after
midnight. waves calm to 2 feet. 
.thursday...east winds 10 to 20 knots veering southeast in the
afternoon, then backing east late. a chance of showers and a
slight chance of thunderstorms. waves calm to 2 feet. 
.thursday night...south winds 10 to 20 knots veering southwest
after midnight. showers likely through midnight. a chance of
thunderstorms. a chance of showers after midnight. waves building
to 1 to 3 feet. 
.friday...southwest winds 10 to 20 knots. waves subsiding to calm
to 2 feet. 
.friday night...west winds 5 to 15 knots veering northwest after
midnight. waves calm to 2 feet. 
.saturday...south winds 5 to 15 knots becoming north 10 to
20 knots. a chance of showers. waves calm to 2 feet. 
.sunday...north winds 10 to 20 knots. a chance of showers. waves
building to 1 to 3 feet. 

$$