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PHL JAN 20/21 Obs and Discussion Thread


tombo82685

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I saw Earthight posted the latest RUC maps in the NYC weenie thread. Looks decent for most of NJ going into extreme eastern PA. Smally delay but not denied.

Not really too concerned if it is 2 inches of 5 inches. I expect around 4 inches in Edison when all said and done..maybe around 3.5 inches

HRRR posted in the previous page says you'll get 3, with 3-4 at NYC. Big gradient NW of there.

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Looks to me like the greatest pressure falls are much further SE than what the models are showing. I would think this is a good sign.

You may be right. This thing's evolving to the extent the HiRes models are a bit herky jerky.

The latest run for me was discouraging, but some of us may be in for some wrinkles we didn't expect...

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One thing I'll definitely say is that the band that's trying to organize just north of DC will make or break this system... especially in areas that have yet to see a flake.

looking at that on the local radar down there it looks like the precip/virga is developing and expanding overhead down there, as opposed to simply moving thru from west to east (or sw to ne).

so is that going to expand north and engulf NJ or something far less encouraging?

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looking at that on the local radar down there it looks like the precip/virga is developing and expanding overhead down there, as opposed to simply moving thru from west to east (or sw to ne).

so is that going to expand north and engulf NJ or something far less encouraging?

Yeah it should expand north and east. Its a matter of how long it stays around and how intense it gets which will determine ultimate snowfall.

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One thing I'll definitely say is that the band that's trying to organize just north of DC will make or break this system... especially in areas that have yet to see a flake.

Definitely, though unless the radar fills in substantially, even that band isn't going to be a huge deal.

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it looks better with each new frame and is the only encouraging thing i've seen all night.

:popcorn:

This band is essentially what the NAM and GFS have been keying on with their higher QPF in central NJ and SE PA up to NYC. Its just a matter of whether it can really get its act together enough to produce like the earlier runs, or if it has trouble like the latest GFS and NAM suggest.

Just a note, so far this evening I've only expressed "concerns" about my forecast, I haven't actually altered anything ;) We'll just have to sit back and watch now...

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This band is essentially what the NAM and GFS have been keying on with their higher QPF in central NJ and SE PA up to NYC. Its just a matter of whether it can really get its act together enough to produce like the earlier runs, or if it has trouble like the latest GFS and NAM suggest.

Just a note, so far this evening I've only expressed "concerns" about my forecast, I haven't actually altered anything ;) We'll just have to sit back and watch now...

I happen to like when you express concerns and or updates as things move along...you where very good with that 2 events ago where we got 4-8. Its nice to have someone updating how things are going,,,and not just post preciep output from a short range model......snowgoose also does the same as you in the nyc thread...its def apprciated.

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