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Late December Discussion and Christmas um Event


Cold Rain

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Guys, we're still 5/6 days away. If there is strong enough confluence in the right place, and there might be, we may indeed start seeing a high modeled in that region. I wouldn't sweat that just yet. If we're 2/3 days out and not seeing one, then ok. I would not be surprised to see this trend colder. Of course, I wouldn't be surprised to see it turn into an Apps runner either. In any event, I'll take my chances with that track.

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  On 12/24/2012 at 11:46 PM, CaseyWXwatcher said:

18z gfs ensemble looks pretty good. Has a low coming from the gulf coast . 850s look a little colder than the OP

If only that meso-low wasn't over Tri-Cities, I would say WNC is in the midst of a winter weather event.

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  On 12/24/2012 at 11:52 PM, Marion_NC_WX said:

If only that meso-low wasn't over Tri-Cities, I would say WNC is in the midst of a winter weather event.

Agreed. The euro ensembles didn't have it there so I'm not too worried about it yet. Interestingly even with that feature there 850s are still colder than the OP

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  On 12/24/2012 at 11:58 PM, WilkesboroDude said:

Since its not way out in long range...if it does not trend better within a few days...it will be time to put the nail in the coffin outside of the mountains.

Well the 18z ensemble is most likely a snow event for the mtns and foothills. 850s are actually cold enough
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  On 12/24/2012 at 2:10 PM, nchighcountrywx said:

The NAM is way overdone but it is likely some snow will fall with a risk of ice in NW NC

I think that is more than overdone. Something is wrong with the map. NAM snow depth is accounting for ice and cold rain it looks like.

It is highlighting the eastern escarpment of the mountains...they are the main areas to watch for ice in CAD situations...not a foot of snow+ while other mountain areas receive nothing.

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  On 12/25/2012 at 1:20 AM, WilkesboroDude said:

I think that is more than overdone. Something is wrong with the map. NAM snow depth is accounting for ice and cold rain it looks like.

It is highlighting the eastern escarpment of the mountains...they are the main areas to watch for ice in CAD situations...not a foot of snow+ while other mountain areas receive nothing.

Have you seen the 18z? Not overdone anymore!

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  On 12/25/2012 at 3:06 AM, packbacker said:

Everyone should go read Wes's right up on the Dec 29/30th potential, I don't remember the last time he sounded upbeat on an event, of course cold air won't be a problem for the MA it will be for the piedmont.

And where would you find this,do tell...

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  On 12/25/2012 at 4:14 AM, packbacker said:

Not sure why its showing 2 SLP's, which is one reason why it's warmer....

I talked about this yesterday. The 12z and 18z looked better because it didn't show the 2nd slp but I did notice it on the ensembles. As long as that low is up around KY or WV, we arent' going to be cold enough. Not only are we not going to be cold enough, NC will miss out on a lot of the moisture as the two slp's transfer to the coast.

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  On 12/25/2012 at 4:32 AM, Marion_NC_WX said:

Guess what...Day 7 looks interesting. Where have we heard that before?

It is a no go for the SE. The dry WNW 500 mb flow keeps the precip. from making it there and then it warms up anyway.

Edit: Later, a new piece of energy latches onto the moisture and brings it in, but it never quite meets up with the cold in the SE.

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Ukie has a good track not sure about temps. GGEM has what looks to be some type light wintry precip north of 40 in NC 540 is near that area tough to tell with that map though. That's a big change from that model it had a cutter at 12z I think.

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  On 12/25/2012 at 6:30 AM, Southern Snow said:

good to see the models trend colder with every run. not sure how to read the map as to what we should be looking for to get the cold in place? did the euro show a high pressure that the gfs hasnt been?

Well for one the EURO shows a stronger system and a more optimal track with no Low pressure west of the Apps.

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