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September Discobs 2020


George BM
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29 minutes ago, Maestrobjwa said:

Uh...am I just imagining things, or are we seeing a bit of that wildfire haze all the way over here? I mean I glanced up at the sun a few minutes ago and it did seem a little hazy...

Welcome to the last 48hrs of conversation! 

It’s not just a little either. Aerosol optical depths around 1.

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18 minutes ago, midatlanticweather said:

42 for a low!! Maybe it can get colder, but wow! 

 

It seems like it flipped to fall fast here.. I remember many hot and humid Septembers.  This is a gift!! Early snow in Denver.. frost in Garret County.  It seems like it is getting an early start!

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Fascinating smoke effect on temps today,  as discussed by Mount Holly in the near term update:  

NEAR TERM /UNTIL 6 PM THIS EVENING/...
Smoke from the western wildfires continues to have an impact on
the region and is expected to remain over the forecast area
today. The SO2 GOES RGB product highlights the thickest
concentration generally from around central PA/NJ northwards.
With the lack of in person observers overnight many of the
ASOS`s are now indicating clear skies but expect that to change
with day break. In coordination with surrounding offices, we`ve
increased the forecast sky cover to reflect that conditions this
afternoon will be rather hazy although not "cloudy". The net
effect on the weather will be that temperature will not warm
quite as much as they would under typical clear sky days. So
I`ve undercut temperature guidance by around 3-5 degrees
suggesting highs this afternoon should be around 70. Normal for
mid September should have highs in the mid to upper 70s so with
the smoke aloft we`ll be below normal with relative ease even
under southerly warm air advection.

 

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