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Yes @Calderon is absolutely correct! @PowellVolz that's not a TDS. That is lofted debris carried into the forward flank. Also a sign of a violent tornado. Sure enough OHX finds EF-4 damage. Though the lofted debris signature didn't last as long, it has similarities to the Kansas City tornado last May. Middle Tennessee tornado itself might have lasted longer than the KC one. Have to look back at all that. At any rate, this Tennessee tornado was historical.

European weekly charts are ugly for severe wx the next few weeks. Great Lakes Ridge with Gulf Coast underbelly is replaced with more traditional East Coast ridge. +AO and -PNA spell more Dixie Alley trouble. I'm not rooting for this. Rather postpone to May Plains.

Low CAPE high shear events happen. Wait! This was not exactly that... I'm watching KPAH get the hail treatment about 5pm Monday. Back of my mind I know it's westerly flow aloft over a boundary - but a little early in the season for that set-up. Text my buddy a boundary rider is going off on PAH, but don't think too much about it. Cell weakens, and I start gearing up for Big Monday college basketball on ESPN. Wake up Super Tuesday to Middle Tennessee super tragedy on the news. WTF? Going back to Monday afternoon shear was never in question. I've written here many times, look for westerly flow aloft instead of that SSW flow junk. Nearly 90 degrees of turning was noted. 850 was a little veered, but upstream was deep moisture - count it as backed in Dixie. 925 mb was straight south and both increased going overnight - all forecast ahead of time! Surface of course had the notorious boundary related SRH. CAPE and instability was more complicated. Steep mid-level lapse rates were in place, but low-level CAPE was close to zero. Forecast soundings had the latter improving; but, I'm such a skeptic of those. Normally early season other rain is falling, and it remains stable. Well no rain was falling south of the boundary. Surface chart in retrospect shows an unstable airmass advecting in unfettered. Sure enough it arrived at the boundary in Middle Tennessee. LLJ strengthened. Alas the 2% TOR area was under the gun. CAMs actually had robust storms, but not necessarily a boundary rider beast. Old fashioned meteorology could have provided a more obvious heads up before the evening news. However, credit some local TV Mets for sounding the alarm on the evening news. Still, it's tough to overcome a 1am long-track cyclical damaging tornado. Dixie Alley is just so awful. It's either busted chases, or much much worse. The human suffering down here is cruel. At least the Vols cheered up Tennessee. https://davieswx.blogspot.com/2020/03/march-3-2020-double-digit-death-toll.html excellent article from Davies.

Flash Drought, but still humid AF and AN temps. Yuck!

ERTAF has begun! Cue up, It's the Most Wonderful Time of Year! Agree with them though, it looks benign for a while. Just as well until after the Final Four. Japan satellite shows the two Kelvin waves (MJO pulses) well. Also got a trough trying to dig into central China. Probably get a ton of MJO interference though. Though both sets of weekly forecasts appear on fire with the West trough, devil is in the details. Soft underbelly Deep South hints split flow chaos.

Super Tuesday severe setup is now hampered by sharp divergence between the progressive GFS and slower Euro. Truth may end up in between, but mostly toward the Euro. As for north/south tracking, EC Op surface low is buried in the Deep South. However the vast majority of its EPS (Ensemble) members have surface lows farther north including the Midwest. That's more severe and more heavy rain here. No wind fields analysis since the whole thing is a cluster now. One can imagine the north members have better wind fields. South members are cool rain. Heck now we can't even pick out the day or the place. Tuesday Wednesday or Thursday anywhere from the Delta to the Carolinas; but, probably only one day where everything comes together for severe in just a couple states. Flooding rain is a different story in a different thread.

Last time the Euro won this battle. It's less flooding and less severe. This case I'll punt my love of severe and pray for lower QPF.

Oh the storm from The Day After Tomorrow sinking south - like the stock market! In sports, the WWE chair rematch is this weekend! KU at K-State is on CBS Saturday!

ECMWF backed off severe a touch, but seems to have shifted the highest QPF into the heart of TVA. Only good news is that high QPF isn't as high as shown 12 hours ago elsewhere. On the severe side, several EPS ensemble members are more like the previous runs. Low press into the Midwest and severe here. EC Op is frontal overrunning.

Euro weeklies just piled on for a bunch of rain next week. Just awful.

Euro retains at least 30 degrees of turning from 850 to 500 mb, and some runs it's close to 45 degrees. Speed shear is pretty much a given. If that directional shear verifies (tendency to get more uni-directional toward the day) and holds it could be a significant severe weather episode. Probably mostly Deep South though, not really our region. At least south of I-40. I was supposed to give up storm chasing for Lent, to keep me out of early season junk. Hmm, what else?

He's wrong. Looking for attention. I don't see anyone by that name with credentials on Linked In. Currently the Milankovitch Cycles approximately cancel out each other. That's why Climate Science can more reliably zero in on the solar cycle and Carbon. The divergence is startling. Sun is sleeping; temps and CO2 continue up; and previously, they had always all 3 been in lock step.

Tuesday 12Z Euro buys in for Day 8 Mid South. Winds turn enough with height, a new development, and dews are there. However it could fall apart the next 7 days. Either way I expect an active March. Trough in the west and Rockies.

Above agrees with consensus on the Solar Forecast too. But if the Contrarian verifies, we already had our minimum. Head over to the Climate Change threads.

AMS paper from U. Maryland has a contrarian view we may be heading into a major / active solar cycle. Hypothesis is solar storms dragged out cycle 23. This cycle 24 has been a little short in time duration and solar storms. Getting ready for 25 to roar out of the gates strong. Endless warm winters! Again it's just a contrarian hypothesis. But it would mesh with 2012 going into a warm 2012-13 winter. If anything can go wrong...

Cold core surprise is possible in the Mid South still. Lows are stacked, which is helpful for that type of deal. However cold core is not my wheelhouse. Wake me up in April. Hopefully after Kansas wins the NCAA Tourney in ATL.

Yes those charts are not bad for winter. I was whining about spring severe. That'd work next winter for me.

Hope that's wrong. Totally backwards vs severe favorable TNI.

Hopefully we can avoid Death Nina SER. Japan model isn’t too bad. Most of the cool is south of the Equator. Is the PDO trying to take a breather? Better be after spring cause warm off West Coast makes severe season bo-ring! Now, that look could be nice next winter if the central north-PAC keeps cooling.

Well that would suck the life out of severe. I place my order for cooler weather central tropical Pac. Keep warm east. TNI boom!

I'm ready to see that MDT Red on the SPC charts instead of the WPC charts. Can it just be April yet? 12Z QPF progs are not quite as bad East, but still there Mid-Tenn. Trouble there is double whammy of daytime rain and then the squall line.

We got almost an inch more overnight. Apparently it all ran off. @dwagner88 was I seeing things or the creek was almost up to the bridge by Food City Jenkins and EB Rd?

MRX rightly is/has been more concerned about flooding. SPC has caved, lol. OK seriously, they did not cave. Shorter Term data not available or reliable at Day 4 shows the problems with the set-up now as we move in to Day 2. It's too damn warm at the mid-levels. Oh this wind field would be amazing with April or even March surface temps. Winds with height turn almost 45 deg. Usually Dixie has about 30 deg. Rooted supercells would spin up in a hurry, but... CAPE is hard to come by. They talk about low-CAPE high shear events. This is almost NO CAPE. Looks like skinny cape above 700 mb and questionable if any below. Lack of low-level CAPE juxtaposed (vertically) with low-level turning is a deal breaker. So, I have zero interest in chasing. I'm not really even worried about severe at home. I will be peacefully relaxing and watching Kansas at West Virginia. Uh, actually I'll probably be barking at my TV, lol! Actually the ESPN crooks put it on + which I boycott. OK, hope for severe!

Rare High Risk and large Moderate Risk of flooding is quite significant for the South. Due to the high impact of this event, please share with your fiends on social media. Make sure the graphic comes up on the post. Date it and make it public too. (just change back to friends your next post.) I went through Thursday, though the High is through Tuesday. This is going to be bad from rivers down to streams and low areas.

Lookout Valley west of Chattanooga, flooding on I-24 per Covenant Transport Met. I-24 was closed as of 3pm Eastern Wednesday.