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Jan 25th Winter Weather Discussion Thread


Marion_NC_WX

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Will go ahead and post. Wanted to wait until 0z but anyway...current thoughts/forecast below.

 

Purple 1-3 inches of snow

Blue up to 1inch of snow

Pink...snowflakes to sleet...little to no accumuation

Red...freezing rain south-west in north GA...freezing drizzle concerns north-east for many

Orange...wild card for the heaviest precip to eek out something greater than the rest. 

Black...relative min. The possible virga never reaching the ground but possible nearby.

 

379266_395487700544230_1892756263_n.jpg

 

Wild card and virga sections both included...wow...

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Hmm that's strange it takes the vort on the 500 at 18z from se Wisconsin to northwest Ohio and into central pa and looks like it attempts to phase with the southern low off the jersey coast a little too late for the northeast but you can see where the difference is vs the 12z where it took the vort over Illinois and then swings it right through Virginia.

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Possibly. I am not sure. The WSW says accumulations from .1-.25" in the watch area.[/quote.

0.10" of modeled ZR isn't even showing up in the ATL-Athens corridor. No need for a watch there or south. 18z GFS agrees with recent less threatening trend.

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Possibly. I am not sure. The WSW says accumulations from .1-.25" in the watch area.[/quote.

0.10" of modeled ZR isn't even showing up in the ATL-Athens corridor. No need for a watch there or south. 18z GFS agrees with recent less threatening trend.

 

The 18Z RGEM Still unchanged, likes showing that area over NRN GA from 09-12Z and then 12-15Z....hard to say if its over ATL but it looks notably south of the NAM/GFS...this model is easily one of my favorites to use inside 36...its even picking up the sleet chances over NRN GA as some of the fcst soundings argue for.

 

gemreg18_PT.15.gif?t=1358979020

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Guess we can't get a good ice storm down in Gwinnett anymore. Seems like when I was a kid they happened all the time. Think that this trend started once the energy associated with the northern stream s/w started getting better sampled as it moved ashore. I think, unless something drastic changes we are going to have a hard time seeing the trends of further north and less QPF in the Atlanta/Athens area being reversed. Going to stink if we just get enough FZRA down here to make the roads a disaster driving into work.

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The 18Z RGEM Still unchanged, likes showing that area over NRN GA from 09-12Z and then 12-15Z....hard to say if its over ATL but it looks notably south of the NAM/GFS...this model is easily one of my favorites to use inside 36...its even picking up the sleet chances over NRN GA as some of the fcst soundings argue for.

gemreg18_PT.15.gif?t=1358979020

Snowgoose,

1) The southern part of that pink area in that 18z RGEM, indeed, does get down to Atlanta.

2) How much QPF is that? Also, how much ZR after 12z Friday on that run? It may not even be .10"+.

3) In this area, I've noticed a bias of the Canadian being too far south with wintry precip. areas. With it being further south than just about all other models and with the less threatening trend of the last four GFS runs, I personally see no reason to favor it. But even if it verified verbatim, I don't know that that ZR qpf is even at .10"+.

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The 18Z RGEM Still unchanged, likes showing that area over NRN GA from 09-12Z and then 12-15Z....hard to say if its over ATL but it looks notably south of the NAM/GFS...this model is easily one of my favorites to use inside 36...its even picking up the sleet chances over NRN GA as some of the fcst soundings argue for.

 

gemreg18_PT.15.gif?t=1358979020

Those HiRes models really have to be watched as we get closer.

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i was surprised to see the winter storm watches up when i got home and started checking things out. hopefully we will start to see the radar light up and move this way as the storm starts.  CADs are odd events sometimes in ne ga and the upstate, and once the cold air gets entrenched with freezing rain it can be hard to get it to go above freezing unless it starts just below adn then warms up quickly. since it has been so long since we have had a real cad event, its hard to remember the details at this point lol.  at least its more to watch than we had all last year.

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I've seen a lot of CAD events where the forecast says it will warm to 35 or 36 degrees,and they never make it past 31 or 32.the perfect scenario for those wanting winter precip in the upstate,would be for Thu night to be clear until about 5 or 6 am to allow max radiational cooling.then have cloud and moisture arrive about 8 or 9 am

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does anyone know why the northern mtns. as well as Buncombe county is not in on the wsw in NC?

 

QPF amounts are not as high.  Buncombe is notoriously drier on systems that move in from the west.  Again, to get any real snowfall here we need a Miller A from the south.  I expect a few flurries on Friday, followed by just a bit of frozen precip, but it shouldn't amount to much.

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I think its because precip is suppose to be more south,or won't be enough for wsw criteria up that way?

oh ok I didn't realize that the whole area wasn't getting some form of wintry weather and about the same amount.  I did see where there is a HWO posted for those counties in the central and northern mtns.

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