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Carvers Gap

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  1. Carvers Gap
    The LR ensembles are are pretty much terrible if one likes snow. Now, the SOI tanking needs to be watched....that usually means something is afoot. I do think we are in a new pattern with a trough in the West and ridge in the East for an undetermined amount of time. The SOI was positive last year. I wonder if the models start feeling that SOI if it continues to tank...it will really not want a trough in the West as that is Nina territory and that is not what the SOI is showing. But if one just took the models from today(and didn't look at the SOI or anything else)...that pattern probably doesn't break until mid to late January if that. The SOI today is -14. If it dips further...just toss the LR maps.
  2. Carvers Gap
    At this point, one could make a great argument that the pattern has already changed...TRI is +1.7. TYS is 2.5. CHA is +2.8. Indeed, it can and does snow during warm patterns. Looks to me like all three E TN locations will very likely finish AN or much AN regarding temps...and all three have received measurable snow. I do think the pattern becomes quite hostile to snow after this weekend. The 12z GFS has already backed-off the weekend system event...we will see if the Euro continues with the suppressed look. I noticed that highs in the 70s could reach as far as Memphis with highs in the mid 60s in middle and west TN during Christmas week on the 12z GF. I do think the cold returns in January. I have mixed thoughts as to when it returns. I have said that beginning tomorrow, we likely will have a 3-5 week window of warm weather. I still lean around three weeks, but could easily see a path towards this warm weather lasting well into the third week of January(or even longer) as we are in a new pattern that is more warm than cold...but not absent of cold. I think the next two weeks will see building warmth over ares of the GC, especially Florida. We really need to see the EPS ensemble break ranks at some point from its previous runs as it seems locked-in now to a warm pattern and when it sniffs out a warm pattern....that dog usually hunts. And the pattern the EPS is depicting is not easily broken down. I have little to no confidence in the GFS as it is pushing the MJO into cold phases and the satellite date in the eastern Indian Ocean seems to indicate that the MJO would likely at some point move the MJO at least temporarily into warm phases - big edge to the EPS. Lastly, it is indeed remarkable how similar the temp anomalies are to last year. Cool November...warm-up in December...Nina like conditions in the eastern Pacific. That said...I think the QBO will likely give us a shot at blocking in the Atlantic. I have no idea when the Pacific comes back on line. When we lost it last winter...it did not come back. I am still banking on the Nino card and falling SOI to bring back cold after the New Year, but that is less certain than it was a few days ago. Warm Decembers are calling cards for Ninos...so no surprise. What does concern me is that the warm got started a bit late, and likely means it gets very close to the heart of winter. Time will tell. Hoping for a flip.
  3. Carvers Gap
    JB had a brief, but good post this AM. How the EPS and GEFS are handling the MJO are worlds apart. EPS is headed(crawling) towards 6 while the GEFS is headed for 8. I give very little weight to the GEFS as hit has settled back into whiffing as we hit winter. This is the time of year that I don't like being in the same boat as the GEFS. As for seasonal change, I am leaning towards the western trough becoming the new and stable pattern for the next 3-5 weeks as mentioned earlier. JB did mention that the SOI is now in negative double digit land. If one wanted to find a glimmer of hope, the SOI tanked in November right before the big cold snap. We really need models to begin changing the look over AK and the NW...the Pacific is about as bad as it can look. If we lose blocking over Greenland, it is going to get very warm. What I don't like is that a warm EC is now becoming more and more prevalent on modeling, but things can and will change. That doesn't mean wall-to-wall warmth, more like a 65/35 combo as mentioned earlier. Maybe our biggest hope is that ensembles have been fairly bad after d10, but this hostile Pacific look just seems like it may have staying power...and I could easily be wrong. edit: Make sure to know these comments reference the pattern after 150.
  4. Carvers Gap
    OTH, the Euro and GEM barely even have that storm. The EPS with yet another warm 0z overnight run. What I am seeing is modeling having trouble getting rid of the warm pattern now which is not surprising. That setup over AK and the eastern Pacific is a pain to break down and will take some time to do so. The biggest problem will be the scouring of cold air from NA. Definitely not a look one wants to see mid-winter. The EPS is not moving up in time the return to an eastern trough. Pretty much stuck at d15-16 and even that looks is pretty dicey. Most operational models and their ensembles look warm after next Saturday - 65% AN and 35% BN type look. . The warm looks are no longer being pushed back and the cold looks are quickly becoming less numerous after d7.
  5. Carvers Gap
    I do think the system at 150 on the GFS probably needs to be watched. The GFS is progressive which means that storm may get more wound-up. It is an outside shot, but has some characteristics of a major snow storm. I think places like NE TN and SW VA would have the best shot due to their prxomity to the Atlantic.
  6. Carvers Gap
    But I think we connect a couple of times (on the low road systems) this winter as it gets colder. I will take Nino climatology for the win...mid Jan to mid Feb.
  7. Carvers Gap
    Seems like we have had some cutters well West along with a combo of lows taking the low road(but little cold air to support snow). I think those storm tracks continue but with Pacific air as the source region.
  8. Carvers Gap
    The 6z GEFS and 0z EPS are worlds apart....maybe light years. They eventually get to the same point...but those roads diverge mightily before reconverting in the LR. I think their handling of the MJO is crucial. While I like the GEFS in finding cold, when the EPS gets inside of d10 it outperforms the GEFS. One models is going to be left looking pretty bad after this bout...If one can scrounge up some commonalities: 1. EPO ridge returns late in each run. NAO weakens quickly just like last time. I do wonder if it eventually fires once Nino climatology is a little less hostile. 2. Ridge comes east with wildly different depictions of its duration(I lean longer than the GEFS...) 3. Lots of rain and Pacific air. Lots of sloppy whether which is a hallmark of El Ninos in this area. 4. Lots of whiplash with a wide range of outcomes possible even during the mid-range.
  9. Carvers Gap
    Yeah, agree. Just the look in the eastern Indian Ocean...plenty of convection. I think the IOD index had been falling as of yesterday. That said, the actual satellite photo is pretty steam in that area. That is part of the reason that I think we get consistent(winter type stuff) during the just prior to mid-January.
  10. Carvers Gap
    If is crazy how the overnight run of the EPS is warm and the 12z is cold. This oddity has been going on for weeks. Looked like the NAO might be lost but the EPO reforms. I think we have seen this movie before. The run wasn't cold, but if it continues to correct...even normal temps in late December are formidable as Jeff noted. EPS and GEFS look good at 12z. I wonder how many times I have typed that during December...only to type that the overnight ensembles took a step back. LOL.
  11. Carvers Gap
    Does not appear this is going to be one of those winters where we a bored...lots to figure out. Also, seems to be one of those winters where events can sneak up on us...especially cold fronts. Great discussion by everyone. And I do think we get a nice period of winter weather eventuall. Lots of cold running around and poor model verification after about d8, even with generalities.
  12. Carvers Gap
    Just now getting caught up on model runs since 12z yesterday...been painting most of the week. The GEFS and EPS are worlds apart regarding the ridge placement and duration in the East in the LR. Just when I think they have their act together...the 0z suite happens. A couple of folks have asked what the scientific argument for warm would be(not saying this will happen), but here they are: 1. Ninos have clusters of warm Decembers. 2. The MJO on the JAMSTEC yesterday showed rain in the MJO regions of 4, 5, and 6 in the LR. 3. The Pacific(if the modeling is correct) is about to be less than favorable for at least ten days - hostile is an appropriate word. For the NAO to really work its magic and produce a memorable pattern, those two need to be in sync. 4. The PV might(if the models are correct) indeed tighten up after this minor/moderate PV split. Those four aforementioned reasons are solid reasons. Reasons to think that the LR pattern will be good(wintry)... 1. November...was a great month in terms of weather patterns. What happens in November, the winter will remember. 2. Blocking is showing up on global ensembles. The GEFS and GEPS this morning do indeed depict a workable eastern pattern. The EPS shows how the pattern could go poorly, even with Atlantic blocking - the EPS has played catch-up since October when blocking begins to show-up. 3. The NAO is turning suddenly negative. That often happens. Many have noted on various sub-forums that the NAO doesn't give a lot of notice when it flips negative. It is likely models don't have this worked out yet if real. That said, modeling showed a great -NAO just a few weeks ago that looked golden...and lasted less than a week. 4. The QBO is dropping which should enhance blocking. 6. The pattern should turn colder due to climatology during January/February. Wild Cards... 1. IOD...dropping sharply but will it maintain that? 2. The SOI has been flirting with positive at times. A few very negative days back in November are keeping the 30 day average more negative than it probably is. The big cold snap during November coincided with a sharp drop in the SOI. 3. Storm track. Hate to say waisted...but we have indeed waisted a great storm track of SLPs from the GOM that have been rainers. Will that great storm track continue? Have to think if it does continue...one of those big cold highs will be money. The frequency of precip events will definitely help our odds of snow. 4. Does the GEFS stay on its hot streak of finding cold...or does its remarkable cold bias make it unusable during all but early and late winter? 5. What in the world has happened to LR/seasonal modeling during the past couple of years? Seems like they used to be much more accurate. I am sure there is a statistic that say they are accurate....but the Weeklies are a shadow of their former selves IMHO. Will they improve as the season settles down? Where do we go from here? TRI sits at +1.2F for the month. With a sixty degree high forecast for next week, have to think that holds strong. I think December finishes AN for temps. It is an outside possibility that TRI could get in the mix for the storm around the 22nd. Right now looks like a Miller B. I have noticed over the years, that when DC gets that set-up, often TRI is where the snow axis begins. Right now, just looks too warm. I still feel that beginning Monday, the pattern is 3-5 weeks weeks from getting into a true winter pattern that is both cold and snowy. Again, it can and does snow during a warm pattern. I probably lean towards the three week end of that window. I think the GEFS is likely correct this morning, but just too fast. So, late in the first week of January or second week of January would be a guess as to when we see the a true winter time pattern - not that this week was a bad one. And that is worth stating again, the weather pattern has been decent. Definitely looking forward to see how modeling works out things during the next couple of weeks.
  13. Carvers Gap
    Had a post on in the queue about how warm the models looked this morning. Got busy and forgot to post it! It would have looked something like this about now.
  14. Carvers Gap
    For NE TN folks...I think this is not a huge event, but any ZR is a pain in the neck so heads up. Modeling has hinted at this on an off for several days. Special Weather Statement National Weather Service Morristown TN 358 AM EST Thu Dec 12 2019 TNZ015>018-042>047-VAZ001-002-005-006-008-122115- Hancock-Hawkins-Sullivan-Johnson-Northwest Greene- Southeast Greene-Washington-Unicoi-Northwest Carter- Southeast Carter-Lee-Wise-Scott-Russell- Including the cities of Evanston, Sneedville, Treadway, Kyles Ford, Mooresburg, Kingsport, Bristol TN, South Holston Dam, Doeville, Mountain City, Neva, Shady Valley, Trade, Laurel Bloomery, Greeneville, Cedar Creek, Johnson City, Erwin, Unicoi, Limestone Cove, Elizabethton, Hampton, Rose Hill, Big Stone Gap, Norton, Wise, Coeburn, Appalachia, Pardee, Hiltons, Hansonville, Lebanon, Dye, Castlewood, Honaker, Rosedale, Benhams, Bristol VA, and Abingdon 358 AM EST Thu Dec 12 2019 ...BRIEF PERIOD OF FREEZING RAIN POSSIBLE LATE TONIGHT ACROSS SOUTHWEST VIRGINIA AND PARTS OF NORTHEAST TENNESSEE... Rainfall will spread north across northeastern Tennessee and southwest Virginia beginning around midnight tonight. As it begins, temperatures are expected to be around or slightly below freezing, but will rise slowly through the night as rain persists. This will result in a four to six hour window of freezing rain or a mix of rain and freezing rain. Ice accumulations are expected to be light, generally only a hundredth or two. But travel conditions could become hazardous a brief time, especially across elevated surfaces like bridges and overpasses, as well as secondary roads. The highest impacts will likely be in southwest Virginia where freezing temperatures will persist the longest. Temperatures should quickly rise above freezing around daybreak, ending any threat of freezing rain and quickly improving travel conditions.
  15. Carvers Gap
    One of these days I am going to go in there when everyone gets a universal dusting and plug-in 13" of snow...
  16. Carvers Gap
    Looks like I had around ~.75" of snow. Could have been a hair more or less than that. Tough to tell. Great to see folks getting in some early season snow. I though the models handled the precip pattern pretty well. No model was overly enthused about amounts over NE TN, and indeed, amounts were fairly light IMBY. Models definitely favored a good thump for those to my west, and indeed, that worked out fairly well. I will add that the roads started getting a little icy around 7:30, but better now. It was great to see all of the reports and pics. It was also great to see all of the new folks and forum participation for this. Another fun event!
  17. Carvers Gap
    To really grasp how much models have moved this AM in the d10-15, look at the BN height change over Alaska in the GEPS and EPS. The GEPS is back to a favorable pattern already, and one might imagine that the EPS wasn't far behind it. So, two really strong biases that are making LR ideas difficult to formulate: 1. The GEFS is too cold in the LR, but it seems to spot cold shots...just have to remember they won't be as cold as modeled - usually. In some cases, the GFS has nailed big highs from way out during the past few months. 2. The EPS is nearly blind to cold shots after d10, and just tough to believe any warm-up that actually occurs in that time frame. A warm-up will happen, but a broken clock is right twice a day(meaning if it stays warm in that time frame...at some point it will be right). Right now, I do believe once inside d10, the Euro/EPS is the better model. So right now, my combo would by the Euro/EPS suite inside of d10 and the GFS/GEFS(with cold bias accounted for) after d10. @jaxjagman, so is modeling today showing a SPV disturbance(edit...I must be just waking up as well!)in today's modeling? I haven't looked. I know yesterday folks were talking about potential records.
  18. Carvers Gap
    I should clarify...the SPV. The PV in the troposphere(TPV) does play a part in our winter weather.
  19. Carvers Gap
    Biggest thing is that there are a lot of mixed signals in the LR. If one wanted to look for hope, the EPS broke a bit with continuity last night. Now, the look is not much better than before. However, the run-to-run trend and the actually 500 portrayal lifts the ridge out into Greenland. What that would do is allow a trough to reform in the East underneath it. In the LR, nothing much is gospel. However, if a model breaks once...not an unexpected blip. If it starts to waffle around, then changes are afoot which would be a good thing given its big ridge look from the past several days. As for the PV, it is tough to really know what it is going to do. Most winters it is a minor factor. With this being a Nino winter and warmth being transported poleward in a cyclical nature(not now), I wouldn't be surprised to see it get jostled more.
  20. Carvers Gap
    And another monster high w big storm showing up on the 18z GFS. Wonder if that finally works out at some point. While the GFS has whiffed of late on big highs, it does spot them before the Euro does in general.
  21. Carvers Gap
    Switched over now in Kingsport. Great sight!
  22. Carvers Gap
    It probably should go in banter...but that 1050 high at day 10 and that storm out of the GOM on the 12z GFS. LOL...that is just pretty much impressive. Wow. Man, I have seen a lot of storms on the LR, but that might be in the top 3 ever.
  23. Carvers Gap
    With it falling at night, that is also a plus for those of us trying to eek out an inch or two of snow in the eastern valley. Interesting for sure. Will also be interesting to see how the system at 144 evolves over the next few days.
  24. Carvers Gap
    If you look on models like the RGEM, NAM, and ARW....they all show several little ripples riding up that boundary. Very difficult to model. If the eastern valley scores on this, it will be one of those "micro-bursts"(man, no idea what to call those) moving from southwest to northeast. Again, we are probably talking the difference between one tenth of moisture. Not sure the models are precise enough for that...yet. One day they will likely be. So, I think the reason for the models "waffling" is we are talking about small amounts of precip making the difference between nothing and and inch or two of snow.
  25. Carvers Gap
    The 6z Euro has beefed up just a bit.
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