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Wintry January 3rd-6th, 2018 Winter Storm The ARCC/Xtreme Weather Special

Wow, writing off winter before we even get in Jan? Interesting. I mean I’m playing with house money as I have already gone beyond my average annual snowfall, but I’m greedy!
Reasonably speaking, I have never seen a winter in which we get a large storm and then an even larger one. The only exception is maybe 2010 and 2011.
 
Alright, bear with me as I put this togethed but unbelievable similarities with this setup with Dec 1989.

For time saving sake I will post only the reanalysis maps..
Dec 23rd 1989, 6z
1989122306.gif


Look familiar in the progged setup vs Dec 1989. Although I will believe that our current setup favors more neutral tilt based on today's modeling at 12z...(hopefully we will get a more favorable low placement).

12z 12/23/17
1989122312.gif

Low is ariund 75°W but at 500mb, understandable with a still slightly positively tilted trough. The 12z suite jas it going neutral around AL/MS today. The 1989 event was LATER in the tilt.

Now we head to 12/24/89..
Closer to neutral but still thumped Eastern Carolinas, East GA and NE FL as well as eventually SE VA then out to sea.
1989122400.gif


Our current 12z guidance setup argues for a bit closer tug to our surface low with a quicker phase and bombing of the SLP pressure system .. once all the convective feedback mayhem settles.
 
We would have to have a complete failure of the Euro on the 500MB level and a different setup for a sudden shift like that. 0.00001% chance that happens. I say next winter! We're done here in N GA for large storms this year.
Jesus Christ, really man? It’s NYE for God’s sake
 
My goodness if the Euro had the phasing energy more consolidated on the map Webb posted earlier that would have been a monster....WOOF
I could see this legitimately trending as far west as Charlotte or Greensboro in NC but west of there I wouldn't given this much credence atm
So I take it you’re liking RDUs chance with the nw trend. I’m trying to temper my excitement.. for now
 
THANK YOU for giving reason here. That should end the wishcasting for us up here and over here in AL, N GA, and Upstate SC as well as W NC. It's dry completely between the DGZ and surface, so everything should evaporate.
The piece of energy have been phasing sooner and west each of the model runs.That's before even the sampling of the energy,which will be sampled tomorrow morning.I believe that Northern Georgia,Most of Alabama,central and Upstate South Carolina and maybe even Western North Carolina still have a shot .We are still 78-84 hours away from the system and systems trend west as we get closer.
 
I may be wrong in this statement, but I think that it actually snowed in places like Panama City and Pensacola, FL in 1989 before South Georgia/Coastal Carolinas got clobbered. It doesn't appear that such a thing will transpire in this situation unless this system really blossoms to the west.
 
Also as the 1989 event trough went NEG tilt, look what happened at the SFC low ...
1989122412.gif


Absolutely started deepening rapidly and retrograded a bit as the occlusion started taking place by then..
 
We would have to have a complete failure of the Euro on the 500MB level and a different setup for a sudden shift like that. 0.00001% chance that happens. I say next winter! We're done here in N GA for large storms this year.


I'm not real sure of that maybe after the first 10 days of Feb. that may be correct:rolleyes:
 
So I take it you’re liking RDUs chance with the nw trend. I’m trying to temper my excitement.. for now
I like the potential of the players we have on the field but like you I am trying to keep expectations in check. It would be just as easy to see 2-4 inches of snow as it would full sun with a stratus deck on the eastern horizon
 
I could see this legitimately trending as far west as Charlotte or Greensboro in NC but west of there I wouldn't given this much credence atm
The realistic best case scenario for this imo would be a flizzard to maybe a dusting in CLT-GSO with increasing amounts as you go east to the coastal plain. I'm not holding out much hope for this storm for my backyard but it's still fun tracking it.
 
Also as the 1989 event trough went NEG tilt, look what happened at the SFC low ...
1989122412.gif


Absolutely started deepening rapidly and retrograded a bit as the occlusion started taking place by then..
Storm...We'd need a phase to occur around Arkansas or Miss to help the interior portions of SC ,correct? I can't wait till our wave enters the US and we can get better model samples.
 
I may be wrong in this statement, but I think that it actually snowed in places like Panama City and Pensacola, FL in 1989 before South Georgia/Coastal Carolinas got clobbered. It doesn't appear that such a thing will transpire in this situation unless this system really blossoms to the west.
I believe the system could trend west enough to the point where the coast get nothing besides rain and maybe flurries on the backside.This system is becoming much more like January of 2000 and 1940 then December of 1989 by seeing the recent trends with the energy and storm track.
 
I may be wrong in this statement, but I think that it actually snowed in places like Panama City and Pensacola, FL in 1989 before South Georgia/Coastal Carolinas got clobbered. It doesn't appear that such a thing will transpire in this situation unless this system really blossoms to the west.

It did. We had a couple of precursor events as well much like Thursday night's light ice event and potential for later today/tonight.

My reanalysis comparisons above to our setup now makes me believe more are in the game this time compared to 1989
 
The one positive that anyone outside of the coastal areas has it that situations like this usually tend to trend NW and the models have been adopting this trend over the past few runs, but I'm honestly starting to think that it may not be enough for everyone to cash in. I would feel better the further east that I resided in the region, but nothing is set in stone at the current moment. However, this has the potential to be an event where locations in Georgia get more snow than places of a similar latitude in Alabama/Mississippi.
 
**IF that does indeed happen, probably have to look at a readjustment in the Miami low closer off Central FL coast which of course, follows more closely with the GS ... plus historically that's prime SFC low positions for significant Eastern Carolinas and SE GA snowfalls.
I agree!
 
GaWX or anyone else with an extensive storm history knowledge, has there ever been an event historically similar to the one that occurred in December 1989? I've looked before, but have never found anything remotely similar to the final snowfall maps or weather conditions that prompted the storm.
 
It did. We had a couple of precursor events as well much like Thursday night's light ice event and potential for later today/tonight.

My reanalysis comparisons above to our setup now makes me believe more are in the game this time compared to 1989
I have no recollection of the event at all due to being only two, but the snow in Georgia stopped thirty miles south of my location and my father told me on numerous occasions that the only thing that anyone was calling for was just intense cold to occur. With this situation, I completely agree that the QPF field would possibly be more north.
 
GaWX or anyone else with an extensive storm history knowledge, has there ever been an event historically similar to the one that occurred in December 1989? I've looked before, but have never found anything remotely similar to the final snowfall maps or weather conditions that prompted the storm.

I think Dec 1989 is the closest we have compared to everything else. Practically all our other hits are from s/w entering California
 
I would say if your NW of MCN to CAE to CLT to GSO and points South and East **IF** it keeps trending better we are in shot for sure. As of NOW** I would say RDU to inbtwn CAE and CHS to Valdosta has the best shot if it only trends a little better.
**I do think if it gets super better, maybe Southern MS and southern AL and NOLA **COULD** have a shot if we can pop the low in the GOM
 
I cant emphasize this enough, but exactly where that low forms off of OR exits the east coast of Florida , will determine where the precip line ends up getting cut off at. It will be a sharp one to no doubt.
Right now it's south Florida, a couple hours earlier on the phase and it will adjust north, hopefully sitting off atleast the central coast of Florida. My preferable is Jax, but that would be some serious wish casting and most likely not attainable.
Stormsfury map shows you the 1989 scenerio, I remeber wilmington getting a foot while I sat in Nash County and saw 5 mins of flurries. Painful. I ALSO REMEBER Jan 2000 and if you look back our sfc low popped off Jax. So their is a good metric or geographic pin the tail on the donkey target to keep in mind and root for. I'll settle for .10 making it to the surface here with 15 to 1 ratios and call it a win.

Webb makes a good point. I've just come in from outside and temp is 25 with thick clouds. I can't even see my breathe it's so dry.
 
Except...we're a few days away from go time. This would have reason if we were 5 days away but we're 3 days away and everything involved with this is going to be sampled pretty good soon. I think this can get further west but not too much further.
 
I have no recollection of the event at all due to being only two, but the snow in Georgia stopped thirty miles south of my location and my father told me on numerous occasions that the only thing that anyone was calling for was just intense cold to occur. With this situation, I completely agree that the QPF field would possibly be more north.

That Friday nothing was in the forecast. It clouded up here in my area (just NW of North Charleston)... then a couple of hours before sleet started ay 6pm that night in the 22nd, quickly changing to snow 630pm. Forecast 1" .. then 1-3" ... every cycle forecasted more as the event kept intensifying. It was catch up forecasts throughout the event
 
It did. We had a couple of precursor events as well much like Thursday night's light ice event and potential for later today/tonight.

My reanalysis comparisons above to our setup now makes me believe more are in the game this time compared to 1989


The recent trends with the Phase occurring faster and further west(before the energy is even sampled) could actually take the coast of South Carolina and North Carolina out of the game for snow. I could actually see Most of Alabama,most of Georgia,most of South Carolina actually getting snow with this system.This mid week system is looking more like January of 2000 and 1940 then December of 1989.
 
That Friday nothing was in the forecast. It clouded up here in my area (just NW of North Charleston)... then a couple of hours before sleet started ay 6pm that night in the 22nd, quickly changing to snow 630pm. Forecast 1" .. then 1-3" ... every cycle forecasted more as the event kept intensifying. It was catch up forecasts throughout the event
Much the same down here; sleet, freezing rain, a good glaze and then it snowed from very early AM until late mid-afternoon; ended up with about an inch and a half of frozen water with snow on top. It never showed on any TV or newspaper forecast (internet was infant then) and during the event our local NWS, radio and TV were clueless ...
 
The recent trends with the Phase occurring faster and further west(before the energy is even sampled) could actually take the coast of South Carolina and North Carolina out of the game for snow. I could actually see Most of Alabama,most of Georgia,most of South Carolina actually getting snow with this system.This mid week system is looking more like January of 2000 and 1940 then December of 1989.

I can't see that happening at all. Best case is as Chris said, would be a small stripe of light snow across far southern LA,MS,AL before it intensifies around Valdosta, GA. Obviously I would love for your setup to happen, but it's less than 1% chance realisticly.
 
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We do also realize that if a Carolina Crusher scenario actually does by some way occur, it still doesn't necessarily mean that areas further west are going to get snow, right? If so it'd be an East Georgia and eastward scenario.
 
Except...we're a few days away from go time. This would have reason if we were 5 days away but we're 3 days away and everything involved with this is going to be sampled pretty good soon. I think this can get further west but not too much further.
Three days away is still a lot of time.There have been systems that have trend well west before within the three day range and with the phasing concurring earlier and further west, could give most of Alabama,Northern Georgia,Upstate South Carolina and Western North Carolina a snow event.We have seen many systems tend much further northwest as we get closer and I see no reason this would be different.
 
hmmm, decided to compare this recent CMC run with the last one that really gave interior Georgia and South Carolina anything and if anything were to happen at all, the trailer really needs to be more diggy and it's likely too late for that...
 
Food for thought. Last January we tracked a storm that showed sig snow in the coastal areas on Wednesday morning January 4th. By the model runs on Thursday the 5th RDU was dealing with mixing issues. And the final outcome was GSO getting clobbered when just two days before it showed an inch for them. It is still early
 
Three days away is still a lot of time.There have been systems that have trend well west before within the three day range and with the phasing concurring earlier and further west, could give most of Alabama,Northern Georgia,Upstate South Carolina and Western North Carolina a snow event.We have seen many systems tend much further northwest as we get closer and I see no reason this would be different.
True we do see NW trends at times but that energy is gonna have to keep on driving big jumps west ever run and keep that interaction with secondary wave to be able to get a low on the west coast of G
FL going across to given anyone outside of SC, NC, and extreme east GA a punches chance its a lot to ask but hey that why we watch and wishcast
 
I think Dec 1989 is the closest we have compared to everything else. Practically all our other hits are from s/w entering California

The biggest issue I have with the December 1989 comparisons is as I mentioned a day or so ago, the trough axis was positively tilted across the SE US which suppressed the low offshore, this time we have a trough that's negatively tilted and the surface high is weaker over the midwest
 
I think Dec 1989 is the closest we have compared to everything else. Practically all our other hits are from s/w entering California

Here's what NARR shows from PSU e-wall. Sure the overall evolution is similar, but the tilting of the longwave trough and surface high intensity over the midwest are a few important wrinkles that could dynamically adjust this event further NW... Our trough is already going to be neutrally tilted by the time it passes the lower MS valley, the December 1989 event was positively tilted all the way to the SE US coastline which again shoves the low pressure track well offshore. There's a lot more room for this to move NW in this case relative to Dec 1989.

ecmwf_z500a_us_4.png

122318.png.gif
 
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