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Wintry Feb. 19-20

I am not familiar with this. Is this just NW flow that breaks containment? I never remember the upstate getting in on NW flow, it usually dries us out and clears us off. Also; 11z would be what, 6am?
Somebody smarter than me would have to tell you why it's convective like that. But I believe in a general sense it's developing b/c of the lee-side troughing effect from the surface wind trajectory of the CAA around each side of the higher mountain peaks which leads to rising air in the low levels.

We've also got some energy and moisture swinging through with the 700-750mb level trough at the same time that plays a part in it.

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There does look to be some back filling on the radar. I'm still getting moderate snow. Be nice to finish with 4" tonight (not far off now) and then get another positive surprise tomorrow morning. **I'm allowed to wish...
my guess is we are going til 7ish in the NE Durham/Falls Lake area. my flakes are still huge and the rate is moderate
 
Somebody smarter than me would have to tell you why it's convective like that. But I believe in a general sense it's developing b/c of the lee-side troughing effect from the surface wind trajectory of the CAA around each side of the higher mountain peaks which leads to rising air in the low levels.

We've also got some energy and moisture swinging through with the 700-750mb level trough at the same time that plays a part in it.

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