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February Mid/Long Range Discussion


George BM

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8 hours ago, gymengineer said:

Sarcasm, right? 3/25/13 was the best real spring (after solstice) snowstorm in my lifetime. It stuck on roads even down in lower elevations of DC predawn and was a nice 3-5” in Montgomery County. 

I had 6” from that storm I think and it was all melted by lunch.

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1 hour ago, WxUSAF said:

I had 6” from that storm I think and it was all melted by lunch.

That was 14 inches I think at timberline, stayed the night at the Canaan hotel and had first chair at t line that day..... about as good as it gets for this side of the Mississippi. That was on top of already a 20"+ snowpack they had there too. Absolutely unreal day

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2 hours ago, C.A.P.E. said:

6z GEFS has a pretty sweet h5 look in the LR. Getting there..

woot.thumb.png.7a97605cd8032cd75090a6c374f6590e.png

When I actually got time to look at the spaghetti plots it appeared to me that out towards day 15 what was going on was a cluster that didn't have much blocking and thus a monster eastern ridge was both muting the high lat blocking on the mean and over doing the ridge look over us. If those outliers continue to drop away each day we will see the ridging up top trend stronger and the cold response under improve. That's a big if though. A compromise could happen too. But there is a camp in there that shows what we want. 

If that happens we would start to see some response on the snow mean soon also as things really are just starting to get favorable at the end. As what is now day 15-20 starts to come into range if the better look is winning I would expect some jump to start there.  

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It's at long range, but that's four consecutive Euro runs that have given mby snow around the 17th.  The GEFS still has a signal for a storm around then, and the signal on the GEPS is growing.  Still more misses than hits, but not bad for something 7 days out.

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I do think there is a lag for the models to understand the possible implications, but I will state that of course if the Pac messes things up we may not get to experience the full/best potential of the  SSW in terms of sensible weather here.  I see the AO forecast has a ensemble target of minus 2 standard deviations negative,  but you can see from there some take it back up, others still downward. I like seeing the PNA forecasted to go positive. I still feel these forecasts are going to play catch up to the strat event. Could be wrong of course, but interesting see hoe things unfold.  

 

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