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Central PA Thread - Met. Winter 11-12 Obs/Disco


PennMan

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Clearly the 0z GFS deciding to hang onto a stronger primary is the reason this run results in a lousy solution... but the cold air damming is impressively evident. At 60 hours the 546 thickness line collapses all the way down into VA and neatly traces out the Apps. There would probably be freezing rain issues in a couple locations, specifically the north central. But hanging the 850 low west like it does allows for too much warm air intrusion aloft. I wouldn't get too bent out of shape about this yet.

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Ugh this thread is a mess. If the earlier guidance output, i.e NAM, low initial wet bulb temperatures will allow 2m temps to drop at or a tad above freezing. Given increasing precip. rates set snow can certainly accumulate at 33-34F. Northeasterly flow will allow confluence to flow into the Appalachians and to the east. The waning 1024mb anticyclone to the north is not ideal, but given low level flow should lock in CAA for typical areas. The potential is there for initial snow down to the Mason-Dixon line along and NW of rt22. The key will be the strength and positioning of multiple vortices. This 'well it is going to be rain' talk has no scientific basis and bluntly is annoying to read.

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Clearly the 0z GFS deciding to hang onto a stronger primary is the reason this run results in a lousy solution... but the cold air damming is impressively evident. At 60 hours the 546 thickness line collapses all the way down into VA and neatly traces out the Apps. There would probably be freezing rain issues in a couple locations, specifically the north central. But hanging the 850 low west like it does allows for too much warm air intrusion aloft. I wouldn't get too bent out of shape about this yet.

I have looked at past events like this and usually the secondary is the stronger low and models hold onto secondary too long. We shall see. Still got another day of model runs to play around with.

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You were saying highs of upper 30's I am showing hi res model that we are looking at overnight/early morning and temps in the lower 30's.

But I stated that the GFS run is what I believe the event should look like, synoptically speaking.

You posted a GFS clown plot and I posted a reply to that.

Neither posts had anything to do with a 60 hr NAM image which I (and prolly most) could give two farts about. Its a horrible model once out of its short range....which is like hr 24-36.

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But I stated that the GFS run is what I believe the event should look like, synoptically speaking.

You posted a GFS clown plot and I posted a reply to that.

Neither posts had anything to do with a 60 hr NAM image which I (and prolly most) could give two farts about. Its a horrible model once out of its short range....which is like hr 24-36.

GFS suck period. Almost in last place in verification. Only thing barely under it is the NOGAPS!!

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Ggem warmer....I agree with eastern..in this setup every flake is a blessing.

GGEM is another one of those models on the lower scoring end. Not putting stock in that. NAM/EURO are my two models to watch tonight and already seen what nam had. If Euro is worse then ya that hurts but if not then good we are still looking ok.

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