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Carvers Gap

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  1. Carvers Gap
    Kind of an interesting look at a144 that might have to be watched around 144 on both 0z Euro and 6z GFS. Due to the weekend storm pushing the cold boundary south, it sort of acts like a temporary block. Due to that, the storm on Monday right behind it was forced south on overnight runs. The frozen precip boundary is now along the TN/KY border for a bit, and then WAA kicks it out. The trend was well south from previous runs....needs to be watched because the trend is pushing that boundary south. Also, there is a HP over the top of that system. Looks like some energy will cut west of the Apps and mess-up the thermal profile...but that look overnight was new and might not be done. The GFS high on the 6z run even forced the low south of the Apps(barely). Need to keep an eye on that trend.
  2. Carvers Gap
    @nrgjeff, if this warm-up has duration...you need to sacrifice those lift tickets.
  3. Carvers Gap
    12z EPS implies that we "might"(famous last words) get some help from the Atlantic with AN heights showing up over Greenland. What is encouraging is that heights have lowered(not hugely) over the SE in response to that. Something to keep an eye on, and continues the odd trend of afternoon modeling being more conducive to winter than 0z.
  4. Carvers Gap
    Yeah, if the area of weak low pressure is going to hang that far back...might as well just slow down and come out as a Miller A. LOL. This time frame is the one where I thought there might have a shot at an overrunning even this week - just didn't pan out that way. That said, that HRRR map is very close to that, but the HP is just too weak. Now, let that energy hang back there about twelve more hours...nah, but fun to think about.
  5. Carvers Gap
    12z Euro is picking-up on some sleet/ZR in the higher elevations north of I-40 on Friday morning in SW VA(edit...sorry), NE TN and Plateau. Looks like it hangs on for several hours, especially in CAD prone valleys and western NC. Tnweathernut mentioned that high would not be easily moved if real. Looks like a good observation there. If the onset of rain is earlier, I wouldn't rule out some mischief in the valley. Not saying anything serious, but nuisance type stuff west of the Apps.
  6. Carvers Gap
    The 12z GEFS looks remarkably like the 0z EPS. Not that a cave means much in the LR...but that is pretty much that.
  7. Carvers Gap
    The Euro tends to really mess around with pieces of energy coming out of the southwest, and that messes up its solution in cases like these where the tail end of the front is lagging to the southwest. The GFS, which is usually more progressive, is more amped and thus has more accumulation. For west and middle TN, I think a blend of the two is probably a good idea. The faster this thing goes, the better it is for the eastern valley. IMHO, if all of this slows down, then the system just dissipates. Looks like a notable event for west and middle w/ the Plateau as well. I have slim hopes for NE TN. Just looks like the moisture zips out of here before meaningful cold arrives. I think west and middle might see 1-3" w the eastern valley seeing accums close to the Plaeau. Not sure this makes it to the eastern mountains though that seems counterintuitive.
  8. Carvers Gap
    Check that. GFS looks good in west TN. The NAM has backed off considerably. For middle and west TN, looks like a decent chance...models ranging from and inch or two...to warning criteria for some locals. I think for E TN...the further east one goes, tougher it gets. When it starts to get down to and inch or two of accumulation...that IMHO begins to get close to model tolerances - meaning it is just tough to be accurate as really one is just splitting hairs between a tenth of an inch of water.
  9. Carvers Gap
    Looks to me like the overall 12z suite, excluding the Canadian suite, has backed off somewhat. May just be simple ebb and flow OR that models are getting a better handle on things. Euro has backed-off quite a bit over several runs.
  10. Carvers Gap
    Just glancing at storm tracks for the next 2-3 weeks. Looks like we have the front Tuesday night. Then, this weekend looks like an slp from the GOM with a low in the Lakes. Then, it looks like cutters OR systems running along the OH river valley. I did read some stuff this AM about the PV tightening up for a time. I doubt that continues for long given the ENSO state. ...And I do hold loosely to the idea that winters tend to balance out in NA relative to the current state. The West has had some fantastic winters during the last five years. I think it likely that shifts this direction at some point. This winter? IDK. We are also due a winter where we get a broad North American tough that is cold coast-to-coast. That type of winter may be due around the time the AMO goes negative. Again, it is very rare that winters don't have some type of warm-up. It is also fairly normal for Nino winters to get going around mid-Jan or even late Jan.
  11. Carvers Gap
    The GEFS gives us some hope with its high latitude looks this AM in the LR. The EPS looks very warm during the d10-15 range and is locked-in it appears. Now, this week is a good example of something modeling missed. That said, JB mentioned that the EPS is doing very well for temps this week and likely next...meaning it has settled-in and has to be taken seriously. Let's see if the GEFS actually begins to roll that d14-16 look forward. If it doesn't, just a mirage. The actual warm pattern is now within ten days and approaching incrementally with each model run, meaning it's not being pushed back. How long will it be warm? I think a wide range is wise...my hope is that it is just a couple of weeks. My hunch(though not set in stone as these past few weeks have had much variability) is that we are looking a 3-5 weeks with the start date next week. So, maybe the cold returns consistently around mid-late January. Not saying that is the gospel...just what it looks like on modeling this AM. The GEFS would imply a temporary and shorter period of AN temps. The EPS would imply a locked-in, repeating western trough. Need to see the EPS begin to shake that look soon as what it is depicting will take time to actually break down. The convection in the eastern Indian Ocean combined with a recently positive SOI(daily)(*edit...dipped back to -4 today) is a strong signal for a western trough similar to last winter. Obviously this is not last winter and the convection is probably 2/3 of last year's event...So, looks like we will have to weather some December warmth which is expected, but I really don't like it coming mid-month. Likely means that warmth presses into January. We will see. Hopefully this will be just a winter of strong variability and no pattern locks-in.
  12. Carvers Gap
    ....and even the 12z Euro operational is cold with very little sign of warmth. So, definitely some conflicting signals. The 12z Euro is quite cold around d10.
  13. Carvers Gap
    The 18z GFS has a textbook winter pattern with blocking in both oceans. I don't like the ensembles...they get better at this time of the year. But the operational run cannot be discounted due to its recent ability to sniff out blocking...
  14. Carvers Gap
    Of particular intrigue just tagging onto my most current post(besides this one), the 18z GFS looks nothing like the 18zGEFS for days 10-15. They could not be more different over the Western Hemisphere. Also, as noted above, the operational runs have often (IMHO) been out-doing the ensembles in the d10-15 range. So interesting test coming up as the operational has not really agreed with the ensemble at 12z and 18z of the GEFS. That said, the MJO might be about to get more active as evidenced by a more active eastern Indian Ocean. That might be something to watch as an MJO which is in the COD...might work its way around.
  15. Carvers Gap
    Glad to see you posting!
  16. Carvers Gap
    Looks like the timeframe for the far eastern valley is between 3AM and 9AM...that sound about right?
  17. Carvers Gap
    Just looking at the 18z GEFS and 12z EPS and 12z GEPS...that is a significant pattern change being advertised. As Bob Chill mentioned(and I also alluded to this earlier today), that is warm pattern. Hopefully, models whittle this down to nothing as they have done with this upcoming week's. But what is depicted doesn't look like a passing ridge in the East...it locks in. If this "warm up" fizzles...have to think that any warm air forecasted for winter in the LR has to be viewed suspiciously. Stinks that is over the holidays, but the tendency so far is for those long term patterns to fizzle. Man, I hopes so...cause that is an ugly, ugly look and if it verifies...a pattern that is very stubborn to uproot. Maybe the strat split comes to pass and bails us out. I could happen. That said, what is being shown is pretty much torch city. Need that look to go away fairly soon. Either way, need this week's storm to perform...might be the last for a decent bit IF the ensembles are true. I suspect they are correct this time...they have been trying to flip for about two weeks on LR modeling. Sometimes, models just get ahead of themselves or sometimes they constantly portray a change that never comes like last year. I lean warm...
  18. Carvers Gap
    Guessing that you are an LSU Tiger due to your handle...since they have had such a great year, you probably need to post in each winter thread so some of that good mojo can rub off.
  19. Carvers Gap
    What do you all think about firing up a thread for the Tuesday event? I don't mind discussing it here either. Just thinking that it might be thread worthy at this point.
  20. Carvers Gap
    ...and I said cold chasing rain? I am batting .1000 today!
  21. Carvers Gap
    No problems with a cold source on those maps. I have been kicking this around...how many of you feel like the operational have been sniffing out cold in the LR compared to ensembles. The GFS operational was the first operational to catch the flip from extreme heat to record cold during the four week progression of October to November. The CMC was next if I remember correctly. Do you have the actually surface temps for the CMC(not just the departures)?
  22. Carvers Gap
    Man, I am about out of memory on my account. Tropical Tidbits has it. If you don't have access...let me know and I will post it here. It is almost post worthy anyway. That was extreme stuff.
  23. Carvers Gap
    If you all get a chance, take a look at the surface temps on the last few frames of the CMC. -45F air coming down the Plains. GFS has that to some extent as well. May or may not verify, but that type of cold never ceases to amaze me.
  24. Carvers Gap
    12z GFS and CMC very poised to unleash bitterly, bitterly cold air around d10. 4 hours ago...I warned about a warm-up. You can thank me later - like washing my car in the middle of a drought. LOL. We will see what the ensembles say...but I think the operationals since October have actually led the way in finding cold after d10. The ensembles in that range have been playing catch-up for about two months.
  25. Carvers Gap
    12 NAM snowfall amounts are true statistical outliers compared to other guidance. Either it scores an VERY unlikely coup or is just further evidence that it amps systems up far too much. I have seen it amped...but this is even a bit much in relation to itself. We will need to tread carefully with that model this season.
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