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October Discussion


TalcottWx

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what's the mechanism for all the heavy rain?  The closed low in Western PA?

 

That closed low helps with some synoptic forcing with a jet streak underneath us placing us in the left exit region. You also get a nice low level jet to develop on most of the models out of the east which aids in moisture transport and low level convergence. 

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FWIW, the weeklies look to carry that pattern into the 4th week with some signs of extending the lower anomalies east into the GOA. It also has a pretty favorable look to Siberia and the snow cover IMO. If I were to guess...I would say the SCE/SAI would be favorable for us. I say that without having a ton of experience looking at previous patterns...but I don't see how that's a bad look, to both those metrics.

The only thing that worries me a little about the SCE / SAI is that there has already been decent snowfall gains (similar to last year). It should be noted most of this snow extent spans areas north of 60 degrees N, so they aren't as of as much importance (depending on metric). 

 

Hopefully the weeklies have a good read on the upcoming pattern

 

 

 

post-144-0-97257600-1412115455_thumb.gif

 

post-144-0-36118500-1412115488_thumb.png

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