April 27, 2011 Super Outbreak Overview and Radar Analysis

welcome this is an overview of the april 27 2011 super outbreak um this is kind of a uh an update i made a video a little while ago doing pretty much the same thing but i i changed up a couple things and i want to make an improvement on that so on april 27 2011 we had what was called a super outbreak or a generational tornado outbreak um which is somewhat a one in forty one and thirty type year of uh one in thirty year type event um and uh this was our generational tornado outbreak you can see the storm prediction center day one issued a high risk over portions of eastern mississippi northern alabama and far southeastern and south central tennessee in their afternoon update they issued that 45 uh tornado probability so that's 45 of a tornado touching down within 25 miles of any given point within that 45 percent and they also um issued that hatched region uh all the way up into central kentucky uh and all the way down into southern alabama and southern mississippi this was the probabilistic damaging wind graphic and you can see they also issued a hatched region over um much of northern alabama eastern mississippi central tennessee and kentucky and here's their hail graphic and you can see significant hail was also issued over a large portion of that region [Music] they did say in their wording a major tornado outbreak was expected and that's pretty much exactly what we got here's a look at our storm reports for april 27 2011 and you can see over 292 tornado reports uh 438 wind reports and 207 hail reports so a total of 937 reports and you can see this large swath right here all the way up into new york we had uh tornado reports so this was a very very large scale event taking a look at our mesoscale stuff here's a look at our um mid-level wins this is at 500 millibars this is our storm system that we were dealing with on that day you can see this large this is our low and as it pushes off it begins to deepen and this is around i believe uh 4 p.m in the afternoon and you can see there's our low over southeastern missouri and this is where we're getting our storms firing up on that southeastern edge of that that dip in the jet stream or that trough and by the peak of the event you can see that jet streak just gained even more strength over that region and that is what provided that lift and that volatile atmosphere um as it sucked moisture out of the gulf and we had a very unstable atmosphere in here we had about three thousand to four thousand joules per kilogram of energy um or cape in this region which is an extremely juicy atmosphere here's a look at our storm relative helicity zero to three kilometer and you really only need about 250 to get strong tornadoes but on this day you can see we had values up to 1200 in this area but mainly around 600 to 700 where those strong tornadoes were touching down but that's just extreme spin and vorticity in the atmosphere now look at our composite index this is our significant tornado parameter and we're just seeing numbers off the charts you can see around 13 i believe 12 or 13 in that area that's where initiation happened out there in western tennessee and central tennessee as we go off into alabama you can see it maintains numbers just off the charts as we go off to the east and uh yeah it just maintains its strength all the way through here's a look at our storm tracks and this is mainly just over alabama for some reason it doesn't include mississippi but alabama and georgia and if we zoom in and take a look so you can see these are all the tracks of these tornadoes you had several tornadoes that tracked over 50 miles there's another tornado track here's another one this is the one that went through tuscaloosa this is the one that went through centerville and you can see these are all individual tornadoes and we had even more over here in uh mississippi and even just all of these are just individual supercell tracks and um we had four ef-5s and 11 ef4s on this day now keep in mind most years we only have typically under five violent tornadoes which is that those ef4s and those ef5s on this day we had 15 15 and that's usually triple the amount you get in a single year and this was just on a single day so that really puts into perspective how volatile and how deadly this day was and the atmosphere was just absolutely incredible everything came together perfectly so now i want to push off into uh the radar analysis but first i actually want to see if we can take a look at the tornado watch uh because i forgot to add that in there so let's go ahead and take a look at the tornado watch i believe here it is and here was a tornado watch issued on that day you can see we have our parameters and our likelihoods all maxed out here um high for every category so they were really anticipating a major major event so a great call by the storm prediction center you can see it was over that large area here's where the initiation happened that was our boundary and storms just formed off of it looks like you also had a prefrontal boundary as well and destructive tornadoes large hail to four inches in diameter which is very very large hail uh was anticipated a classic tornado outbreak situation is developing across alabama as discrete tornadic supercells form a strong low level and deep layer vertical shear combined with the moist and moderately unstable air will pose a dangerous risk for strong and potentially violent long-track tornadoes let's take a look at our probabilities here and you can see every category has above a 95 chance um and actually last week we got uh we got this same tornado uh probabilities that was only the third time in history and i i believe it was only the third time in history and you can just see everything is maxed out with these probabilities so just an absolutely incredible day um let's take a look at our first this was in the morning hours so we had a morning squall line a morning line of thunderstorms that produced plenty of violent or not violent strong strong tornadoes along this line and we'll take a look at this so this is in the morning hours we had a couple confirmed tornadoes out here in northwest alabama and western mississippi even out in central mississippi but we're really going to take a look at these storms that come into tuscaloosa county and you can see if we take a look at our velocity right out here north of elrod and north of let's see this is north of u.s highway 82 east of gordo you can see this was a strong rotation beginning to develop as it moved up towards samantha and this was north of tuscaloosa tuscaloosa the tuscaloosa county just got nailed by these tornadoes that day and you can see this was a magnitude of three so an f3 tornado an ef-3 and at peak winds of 140 miles an hour according to the national weather service's damage survey and you can see this thing continued to push off to the north and east and this went through samantha as well as it crossed over state route 13 right in town and this continued to push off to the northeast we also had another tornado touched down in barrie and barry got hit twice this day the town of berry this was an ef-1 with peak wind speeds of 100 miles an hour because as you can see from that storm report um relatively broad rotation but definitely probably had some meso vortices under that and then as we go on you can see another strong tornado begins to develop and this is north of the tuscaloosa area and this is developing out near gorgas and this was a strong rotation and even if we get a storm track on this and get that storm relative velocity if we take a look at this that is where it develops right along state route 69 as it goes up to the northeast near gorgeous it continues to get stronger and stronger this might have been the peak velocity scan and we can see around 108 knots delta velocity this is uh 58 on top of 67 so probably roughly around 125 mile an hour gate to gate sheer with this storm and this was just with the morning uh the morning storm here's our storm report they said an ef-3 possibly higher so they the storm or the national weather service was indicating that they think this may have been a violent tornado just with this morning storm it was 300 yards wide which is more than a football field wide in diameter and at peak winds of 140 miles an hour this also went up into the oakman parish cordova area which got slammed by an ef4 later that day um so it just i think there was a parallel path it kind of paralleled where the cordova tornado touched down later in the day i think it may have actually went right over the track because downtown cordova took a hit later in the day but here's that velocity scan once again and if we take a look at our base reflectivity there it is and you can you can visually see where that tornado is that is our actual debris ball right here and it was probably eating trees unfortunately we don't have the product correlation coefficient at this time we got it later on down the line in 2013 but it would have been a very nice product to have during this event again these storms continue to track off we have more meso meso vortices forming along this line you can see they issued a huge uh tornado warning for that birmingham area and uh just an incredible line of storms went through in the morning hours there's some more embedded rotations as we push off um again it looks like another tornado developed uh near warrior so we're gonna pull up the next scans here we are yep and there is that latest scan for that warrior storm and there's that rotation near warrior i believe this did put down a tornado in warrior correct yeah so this was an ef2 tornado that went through warrior alabama the track was 3.2 miles long 200 yards wide so that's that's the size of a football field in diameter and you had between 125 and 135 mile an hour winds with this we also had another ef-2 touchdown in catawba heights our cahaba heights this is north of the birmingham area very populated area and there is our area of rotation right there if we take it to reflectivity the tornado would be embedded right in this area this is east of vestivia hills i this this area got hit pretty hard i remember seeing damage photos and this torrent this vortice continued to move off to the northeast off towards leeds and we also had some more tornadoes i believe up near the good hope area i know holly pond also took a direct hit as well with these morning round of storms and that's holly pond right there yeah so there was that tornado in holly pond as it strengthened there's our velocity couplet and that is where that tornado touched down in holly pond we also had a tornado touchdown near bran or branchville this was an ef2 so if i actually look right here that is our tornado near branchville and odenville in the morning taking a look uh up to 125 or 120 mile an hour winds also 200 yards wide so these were some wide tornadoes this was the size of a football field as well and a 3.9 mile long path as we go on you can see some more tornadoes touched down in the northern part of the state near guntersville hard to see from here but it looks like we can also see the rotation right in there and if we just take a look at this we'll just do a little loop of these storms as they moved off and just very impressive storms and they cleared out and there's another little round uh didn't produce much i don't i think it may have had a tornado or two and then the atmosphere cleared for the afternoon rounds so we're going to take a look at the afternoon rounds except to find it and here's the afternoon round so this is our supercellular mode um this was the afternoon round of supercells this was the deadliest part of the outbreak the morning hours were very very significant you had more strong tornadoes than you see in most events with that with that morning mcs or um mesoscale convective system or sorry that qlcs quasi linear convective system and um here's the supercell this was the first one of the day um and this was the one that produced in coleman and here it is on reflectivity we'll go ahead and show you that as it moves up towards coleman this is where that rotation really begins to develop southwest of the city and this was this was really really well known because james spann had that tower cam on it as it came through the city of coleman you see as it gets through that city to the city of col coleman we have that beewer and that donut hole beginning to form and that's very indicative of an extremely strong updraft on a storm and typically it's associated with tornadoes as well as it enters the city of coleman and it's about to cross over the u.s highway 278 and i-65 in downtown coleman this went directly through downtown you can definitely see as it goes through downtown it has that extreme hook echo on it right there and all of these storms during this day had extreme hook out goes on it as well and you can see it's definitely exhibiting an impressive signature and this was this was kind of these pre-frontal round cells and again as it pushed off towards arab that is where it did ef4 damage over here in arab in downtown coleman we had ef-3 high-end ef-3 damage but it did not produce ef4 damage until it pushed off towards arab and uh again we had some more cells these were the other cells that developed out in phil campbell and uh smithville um and we'll go over those here in a second but we're gonna take a look at the velocity signature for this cell out here in coleman as it moved off taking a look we're going to get some we're going to get the storm relative velocity on this and that's when that rotation really begins to develop um and you can see it here it is this is when it was southwest of the city and i believe it was just dancing around out there in those trees but there's our rotation as it moved off towards coleman you can see this thing is really starting to get developed west of good hope and southwest of the city as it goes off this is where our tornado touched down this is where it first touched down and really started doing incredible damage this was just southwest of downtown coleman and that is your couplet and i'm going to try and make this as detailed as possible so i actually want to show you a 3d image of this storm and you can you can barely see it but this is our tornado right here on 3d and this storm was a very very impressive storm it was it was not a large tornado this coleman 20 was a multi-vortex uh kind of almost like a drill bit um and it was it was a long tracker as well um and as it goes right into the city you can see those velocity couplets really really tighten up or the velocity coupling i'm sorry really tightens up right as it about to track over i-65 into downtown coleman let's hit the downtown comb or the coleman courthouse the city courthouse down there in coleman and the velocity as it went over the city got really contaminated but they were very very strong as it pushes off towards the arab area there is that rotation once again and it does track off towards fairview and baileyton again there is our really impressive rotation right there over fairview um i believe it was still at high end ef3 damage at this point there's a look at it on the base velocity the storm relative velocity really gives us an idea of what we're looking at and again it continues to strengthen as it goes off in the arab and as it reached arab you can see this inflow really started to ramp up and this thing turned into a wedge tornado just west of the city of arab and here's where it kind of goes out of radar range and we have to go and look back new cells start to develop and these eventually produce violent tornadoes as well and look at the echo tops you can see all these high top supercells they were all reaching about let's see yeah about 50 000 feet in the air with their top so higher than where planes normally fly so these things were reaching really really high and this is the point when the cell near gordo and reform this was the air or this was the um the berry oakman parish cordova ef4 and this is where it touched down you can see a long track tornado started northeast of pickensville this was a half a mile wide swath of ef-3 damage noted in downtown cordova and i'm not sure exactly where the ef-4 indicator was but there was a couple and i think this tracked about 70 miles if i remember correctly so we'll go ahead and take a look at the next scans there's that rotation as it's going into reform right in here and what we're going to do is we're actually going to take a look at the base reflectivity as this moves off and you can see that hook echo begins to develop and there is when our visible debris ball shows up on radar west of moore's bridge and this moves off towards barry and you can see this is following a very similar path to what that storm in the morning followed as it went through samantha this area got absolutely slammed and this is about as textbook as a supercell as you'll ever see just an extreme hook echo right there very very clear and this was a wide tornado as well and as we continue to go off towards cordova this thing continues to strengthen and this went through downtown parish i believe as well south of oakman and there's our debris ball uh forming right back up there on uh radar or on reflectivity i'm sorry and that's very indicative of a strong tornado especially when you see something like this now let's take a look at this and one thing we can really really see and i really love about this uh 3d image product is we can actually take a look at the 3d image of the storm and see the tornado right there which is really really cool thing we can do with this product and if we take that forward again you can still see that tornado on the ground it starts to fade a little bit but i think we can see it on the ground for a scan earlier as well yeah and there's an even better look at it so right there we're taking a look and there is our tornado so a really really cool look into the 3d action of that storm now as we go continue to go off towards cordova this thing looks like it weakens a bit and then it re-strengthens as it goes towards sipsy and arkadelphia this thing makes a northern turn and heads right towards arkadelphia and i believe it lifts right around there and if we go back off to the west we're going to take a look actually let's take a look at our velocities real quick with this storm for those of you who are interested and this is where that velocity really began to ramp up near moore's bridge as we go off this is this is right around where it begins to really intensify near berry and this is north of samantha where that morning storm went through so we push off actually let's go ahead and take a gate to gate here so around 218 knots delta velocity so that's 120 on top of 132 so 252 gate to mile an hour gate to gate sheer so very impressive as it moved off towards oakman and this was as it was reaching oakman and parish you can see again still a very very impressive velocity signature and this is where it widened out a bit as it moved towards the cordova area and it was just a large tornado at this point there's your velocities again and you can see it intensified once more right as it went over downtown cordova and this pretty much engulfed the city of cordova as it went off towards sipsy again you can still see the velocities are very strong and this is in its dying stages this is where it begins to weaken or not weaken but this is where it begins to uh a wrap itself up but you can see it is still incredibly intense just east of the town of sipsi and as it goes into arkadelphia and then it lifts after that somewhat 70 mile i believe it was above 70 mile and over 70 miles that it tracked now taking a look this is this is a look at our the most infamous cell i'd say and this was the tuscaloosa cell again james spann covered this absolutely incredible coverage and if you haven't watched this coverage already go ahead and check it out on youtube just look up april 27 2011 coverage and it'll come up abc 3340 he did an amazing job and you could literally see this thing track right over downtown tuscaloosa this is a look at our reflectivity you see this cell begins to start to exhibit that hook echo right as it comes into downtown tuscaloosa and i believe it touched down right around here right before it entered the city if you look at our road map you can see this is just an incredibly incredibly populated area down there in downtown tuscaloosa right as it goes into the city you can see that debris balls start to develop on this cell now if we take a look at um 3d we might be able to actually see inside this cell and see that tornado and there it is there it is on 3d you can see that large tornado right over tuscaloosa and that's actually pretty accurate as to what it looked like in real life now if you go on another scan that is when it becomes a wedge and there is our wedge tornado as depicted on this 3d model as we continue to go off it it becomes a little less clear but there's a look at our 3d and you can see that debris ball really really deepens as it goes after it goes through downtown tuscaloosa and it's just tearing up homes now this thing was rated a high-end effort at 190 miles an hour but it actually did do ef5 damage to an apartment they just deemed it inconclusive see that debris ball continues to deepen as it tracks off towards the downtown birmingham area and let's go ahead and take a look at this velocity as it tracks into tuscaloosa that's right as it's touching down and as it enters tuscaloosa this velocity really really intensifies and as we go off to the next scan this is when it's its deepest or when it's it's most impressive and this is actually one of the most impressive uh velocity scans you'll get out of any tornado you'll ever witness you can see a hundred and or 249 uh not delta velocity negative 161 on top of 126 so that's almost 290 mile an hour gate to gate shear on this tornado definitely one of the most intense tornadoes of the decade and there's no doubt about it this thing continues to track off to the northeast as it goes into north john's you can see it re-intensifies and it continues to go and at this point it's very very rain wrapped as it heads into a huey town and it also did uh ef4 damage in pleasant grove which we'll see here in a second i'm going to take us back on over there we go and this is where it is in pleasant grove um and it did high in dfor damage there continues to track off and what i'm actually going to do is double panel this now and we can see our tornado this goes into fultondale as well still on the ground this was still doing high-end ef3 damage goes right through fultondale where we had that tornado earlier this year and then it diminishes now if we look back to our west here is that tornado and this one touched down a near forkland and traveled along swearville this traveled along a very similar path as the one that we had last week north of greensboro you can see let's go ahead and actually what i'm going to do for this one is take this off and get that storm relative velocity the hook echo begins to deepen as this travels off and this i believe goes right through centerville um or maybe northwest of centerville still very very deep but we take the storm motion from marker we can see this on storm relative velocity that gives us a much better look into that storm and very very intense velocity signature with this thing as it moves off to the east towards eel line and you can see it continues to deepen here's a here's a gate to gate shear we have 152 knots uh of delta velocity that's 90 on top of uh 86 so around 160 mile an hour gate to gate shear i believe or 170 mile an hour gate to gate shear my bad and this continues to go off and this was a long tracker as well you see this thing is still on the ground and strong as it goes off towards the west blockton area and this is where it begins to sort of die out you can see it's still intense as it moves off towards marvel and that is where it really really weakens and a look up here that is where this tuscaloosa cell begins to cycle and this put down an ef4 north of ragland and see this is our velocity over here and this is our reflectivity there's that debris ball as it shows up this is north of a hatchet this is similar this also took a similar track uh to one of those cells uh we had last week on thursday this went into glencoe and this was at this point i believe it was where it was producing ef4 damage north of wellington and glencoe there's our debris ball and reflectivity if we take a 3d of this image we might actually be able to see this tornado yep there it is there is our tornado there's there's that ef4 and um just a very very impressive looking see most of these had such clear debris balls and such clear tornadoes on 3d because of how classic supercellular they were and again there is a look at that velocity we actually take a gate to gate uh 153 not delta velocity that's 79 on top of 97 so around 160 miles an hour gate to gate shear but still a very intense tornado as it moved off towards the piedmont area and again it intensified and i believe this is where it did its most intense damage is north of piedmont and this is where it goes out of range of the radar but you can see it still continues off towards forney and this is where our cells begin to develop down here and another ef4 is in the making go ahead and pull up our there we are and so this is where the um the next effort you can see another round of cells begins to develop out here we also have another tornado develop i believe near vincent and harpersville yeah there we go an ef1 so one of the rather weaker tornadoes of the day up in that area but this is our lake martin ef4 you can see another classic supercell look to this storm let's go ahead and bring that into double panel as well and here we go another scan and this thing really intensifies again another hook echo beginning to form in a strong velocity this was only rated 170 mile an hour so it was a low end ef4 but still another ef-4 on this day there's our debris ball on uh reflectivity and i believe this is where it inflicted its most impressive damage and we go off again there it is again we can try and take a look at the 3d and see if we can see the tornado on this and again yeah look at that and it's not very visible so we'll continue to go off and as it goes off towards daddyville there's that there's that signature that velocity signature and that deepening debris ball and it continues to track off and again it's still very very intense as we can see from that debris ball on reflectivity and this thing tracked a long ways as well this is a very wide tornado we take a look at this nine people died from this it moved through dexter producing ef2 damage intensified to ef3 as moved through a mobile home park and it then intensified to an ef4 eventually and then these storms moved off into georgia producing more intense tornadoes now that was the last of the intense tornadoes in alabama that day so now we're going to take a look um now this was back over here we're going to take a look at this storm near philadelphia and this was an ef5 this was the first uh i believe this was the first ef5 of the day this is where these cells began to form and you can see this thing really puts puts off that beam that being shaped to it and as we go off we can get that storm motion from marker and there's that storm relative velocity and this is where it goes tornado emergency the tornado has not touched down yet but this moves right through philadelphia and this is known for actually um digging a two meter trench into the ground and ripping up asphalt out of the ground so this was a really really intense tornado and reed timber was actually on this and it's it's shown in his um storm chasers episode of this day and this is where this velocity really you can see this huge velocity couplet beginning to develop this huge mesocyclone and this is where it really really begins to intensify yeah and there's a look at our velocity as it goes through philadelphia i believe it is on the ground at this point this is where it touches down [Music] and the next scan is really where it deepens um i'm not sure why it's at an ef4 with this because this was actually an ef5 um but yeah this was actually an ef5 the storm report says efforts for some reason but then again there's there's another look there's our hook echo as we go off there is that velocity signature so we'll just take a look at it uh right now it only shows about 130 not delta velocity but it was much stronger than that on the ground and then we start to see this cell go off towards the making mississippi area and this put down another intense tornado i believe it was an ef3 in macon and here's another cell to the south that when tornado emergency as it went into dekalb and there's a look at that velocity very very intense as these cells track off and the more intense ones are up to the north uh again here's a look at this storm there was a tornado near vaden as well 10 homes damage this one was one of the weaker ones of the day and then we take a look back south and there's some more cells beginning to develop you can just see cell after cell blowing up off of this boundary and continues to produce strong tornadoes throughout the day and we watch this thing tighten up and i believe this is an ef2 if i'm not mistaken yeah an ef2 with 115 mile an hour winds there's our velocity coupler although small this thing on the ground was rather impressive and you can see that hook echo right there as well located with that and this cell produces plenty of strong tornadoes throughout the day and we're going to go off to our next one there we are and looking at this this is where this dekalb storm really develops a viewer or a beewer as it moves into decalb are they called yeah there we go there's a look at it and i believe this thing dropped an ef-3 tornado maybe as it went through scuba um and we'll really get a better look at that whenever we look at this radar here in a minute but going back off down here this is a look at our ef2 tornado i will continue to track this one and this thing goes through a little while without producing a tornado some more cells begin to develop and i believe these are the ones responsible for the centerville ef3 yeah those are the cells that blow up and produce that centerville storm but look as this thing passes the radar you really start to see hook hook echo develop and this looks like another classic supercell and there is when it really tightens up and puts down this is an ef-3 this add um let's see doesn't tell us the wind speed oh 130 mile an hour wind speeds with this thing there's that velocity couplet right there and now we see a defined hook echo associated with that um with that velocity and we'll actually take a look see if we can do this thing in 3d and see the tornado yeah there we go you can literally see a rope tornado on the ground with this thing and that's actually one of the more impressive 3d images i've ever seen on on this thing and literally clear as day there is your tornado coming out of the storm via 3d an incredible incredible look at that we'll continue to show you that pant panning around that last game you can start to see it come out of the sky and with that new scan boom it's on the ground and there it is it looks like it's still there as we go off to the next scan now let's take you off again and see it's still deep right there still impressive as we go on uh we also have a new cell developed out there to the southwest and this is where that storm begins to kick up again now we'll take you over to again the next scans look at the next scan it's out there near newton and here's that new velocity signature let's go ahead and get that storm relative velocity real quick for you guys and let's take this dual panel as well and now looking at this um by the way this was an another ef-3 this one was almost an ef-4 this 145 mile an hour winds on this thing there's that donut hole that classic donut hill that's indicative of a strong updraft once again this moves off to the east and there's a there's our velocity signature very very impressive velocity signature located west of hickory and you can see several houses were damaged and significant tree damage was associated with this as well as this goes off you can see our cells to the south are beginning to intensify as well and that cell weakens and this is where another ef4 tornado touched down 175 mile an hour winds six fatalities and 35 injuries with this thing uh well-built homes were completely demolished there's our velocity signature with this thing as we go forth you can see this really intensifies with that latest scan i put that dot over you can see right where that is there's our velocities associated and again it intensifies once more as this moves towards montrose and you can really really see why this was an ef4 really intense couplet now if i take if i take a slice in this 3d we might be able to see this yeah very very clear as day so there is our tornado right there this is our ef4 as we track off it's still very visible right there that is our tornado and again once more we track off and it's still down and that is where it turns again it looks like maybe a wedge beginning to form but as we go off to the newest scan that is where we see our clear as day debris ball this is where i believe it was at its most intense right over montrose 136 not delta velocity that's 61 mile an hour on top of 95 so around 150 not our mile per hour gate to gate shear so incredible incredible stuff again you can see this thing is still on the ground this was the storm moving off towards enterprise and you can see it continues off there's still impressive velocity signature with that and it continues off and continues off and it lifts and it briefly lifts and then begins to intensify as it moves through enterprise now we had another ef4 go through enterprise so this thing recycled again there's your classic donut hole and there are those velocities over there in enterprise you can see these things really really ramp up newest scan and this is where it's really intense and this thing was another wedge 145 not delta velocity that's 54 on top of 82 um so around 140 knot gate to gate shear keep in mind this is very far from the radar so it's not picking up every every ounce of velocity you can still very evident that's where your tornado is on reflectivity this thing continues to go off and this is where we really lose track of it but i believe it went out through snell you see another cell begins to develop out south there now taking a look let's go up the here to uh here we go now this is where we had two efi's we had our ania 5 and phil campbell and hackleberg as well as in smithville so we'll take this two panel take this storm relative velocity and this is where we have our cells really really start to blow up you can see cell after cell producing intense rotation out here here's some intense rotation over there near springville another cell develops out south and there's one up here north as well these things are really really incredible as they track off and if we were if this was today's radar you can see this radar um we'll actually smooth this one out to make it look a little bit better um you can see a strong tornado develops south west of sherman there's our velocity couplet right there a classic bean shape to it you can see some cells are going up to the north and there's your velocity coupled in sherman surprising this was this was only an ef-0 tornado but you can see a very intense velocity coupler associated with this thing and this is where uh an intense tornado touched down near houston you can see seven fatal 150 mile an hour winds with this thing there is your tornado you can see that clear debris ball on reflectivity now we might actually if we take this thing and we get a storm relative velocity on this we might actually be able to see this on um yeah yeah let's let's take a look at this we might actually be able to see this on 3d as it gets that debris ball so taking a look at 3d and there we are there's our tornado clear as day you can see it down here extending from the clouds to the ground there's the top of our storms up here and let's see if this thing continues to go off to the east again yep there's our tornado very very obvious cone and then let's go on back to our radar see this thing continues to intensify as it's off towards egypt there's our velocity couplet very very intense rotation associated with this thing uh as it moves off towards ocalona this thing was a wedge i believe as well tornado on the ground yep south right there continues to intensify near bigby four fatal four fatalities reported right there with that and this is when it begins to lift and put down the smithville ef5 first let's go ahead and check on this phil campbell storm in hackleberg there's a look at that um just incredible view of this storm and that is where it went through downtown hackleberg and you can literally see that debris ball clear as day let's take this into 3d and there's your large large tornado right there and um i believe as this tracks off we can still see it yeah there it is again as it goes off towards phil campbell one more scan you can still see it over there let's take this off and go on up and as it goes off this is northeast of phil campbell this is when we really get to see the velocities this thing had a i believe 150 mile an hour or 150 mile track there is still our tornado you can see it on reflectivity that dot right there that is our tornado and if we look out here this is when our smithville ef5 begins to develop we have 14 fatalities and this thing was known for being some people refer to it as the most intense ef5 of all time or the most intense tornado of all time because this thing literally in 25 seconds it was it was producing ef5 a tornado an ef5 tornado this thing went from literally touching down to an efi tornado in a matter of seconds we take a look back at this thing let's go dual panel so let's go ahead and look at this this is when it went through smithville and this is when it's at ef5 intensity you can see that velocity coupler is really really intense if we take a look at our gate to gate shear this thing won't really tell you how intense this was on the ground as a wedge but 88 mile an hour are 80 88 knot delta velocity which is really not this one was a 205 mile an hour wedge so that's really not indicative of what it looked like but let's get a let's get a storm load of velocity on this thing so we can show you that 3d yeah there we go there's a look at those velocities and let's take a 3d cut of this thing and you can see there is your tornado clear as day on that 3d and this was a really really cool feature that this program offers this is gr2 analyst and you can see that tornado is still on the ground as it moves off to the east this thing continues and continues that phil campbell storm still on the ground up there and we'll actually get a better look at that whenever we go off to another radar site there's a look at that other tornado as this thing goes off to the east we have another intense tornado touched down near beaverton this is an ef-3 and there is that debris ball and that rotation associated with it you can see right there and there's that debris ball now we can actually try and pull this one into this with this thing i believe went through downtown haleyville um you can see still very impressive let's see if we can find that thing on 3d yep there is that wedge shape to it you can see that wedge wedge tornado right there and as we go off to the east still very very much there uh and we continue off there went through downtown haleyville and produced high-end ef-3 damage and that is the last of that one now let's go ahead and take a look at some more intense tornadoes so this was earlier on in the day this is a look at the morning storms and this thing went through the trenton area i believe let's go ahead and dual panel this again and this is a really in-depth um breakdown of these storms so uh this thing may go on for a while we're already at 50 minutes but this is real this is really trying to be in depth and this thing goes out towards the lookout mountain area and we did have a tornado associated with that i believe and this touchdown i went just east of the chattanooga area or a funnel cloud was reported this is where we had reported tornadoes in the morning with those rain showers uh trying to report it on the ground but i'm not sure if that actually got reported now on this radar we can take a look at this is the coleman cell as well but we're going to see what it looked like as it went into arab so here's a look at coleman cell this is when it was doing ef4 damage northwest of arab you see that real intense velocity couplet right there and there is that debris ball on reflectivity we can get a gate to gate shear this thing um 153 not delta velocity that's 77 mile per hour on top of a hundred so 177 gate to gate shear this thing was a wedge as well uh we'll take a 3d cut of this again see if we can see that on 3d and yep clear as day again you can pretty much see everything on 3d during this day there is that tornado northwest of arab this is where i was doing ef4 damage again next scan and it's not as clear let's take this thing off to the northeast also on this radar we're able to really see what this thing this phil campbell storm and that was as it was going through phil campbell and you can see that velocity couplet really maxes out over that area this it did ef5 damage to hackleberg and phil campbell and this thing will come more into radar range where it was a long tracker as well um so let's go ahead and pull up the next little spurt there we go and this is where the storm begins to recycle and this thing this cell will put down another intense tornado this thing puts down an ef4 let's get that storm relative velocity and this is when it comes out of okay so this is the phil campbell storm let's let's take a look at this real quick because i want to go over this um and this is as it came out of phil campbell and headed off towards hatton and this thing was still producing ef5 damage at this point there's a look at that velocity signature as it moves off towards hillsboro i believe it was producing ef5 and ef4 damage at this point as well very intense velocity couplet still associated with this thing again you can see it's still very much there as it goes off towards hillsboro and um this one off towards trinity and tanner it was still producing high-end effort damage this thing was a very very massive tornado we can try and see if we'll see it in 3d i'm not quite sure if we will be able to though um not very evident right there yeah still not very evident so it's not really showing up on 3d but you can see red tvs and that extreme hook echo and there is that debris ball on reflectivity that hooking echo as well pushes off to the northeast towards the tanner area and this thing is still on the ground after tracking over 100 miles this moves off towards the harvest area still producing ef4 damage there's that debris ball as it moves towards the harvest area you see this thing was reported in downtown harvest there is that debris ball still with those strong velocity with that strong velocity couplet see this thing is still on the ground there's that debris ball on reflectivity we put that there they align perfectly that is your tornado right here and right here again still on the ground as it moves off towards hazel grove or hazel green and that is when it eventually lifts but it does put down another tornado in tennessee right here near huntland um you can see that tornado was on the ground and this is where that veloci or that radar actually cuts out and we can no longer see what's going on and this would this radar would have been really helpful to have because there's multiple ef4s that touched down later that day in this radar hole but let's take a look at that that coleman storm out there near arab so as this thing recycled uh another intense tornado would go on to touch down near scottsboro you can see this area of convergence is beginning to come together that's that inflow really really ramping in you can see this cell actually to the south is sucked in to the inflow it actually intensifies this thing as we look this is near pig saw this is where it does ef4 damage i believe and in flat rock not what i meant to do and you can see there it is with this next scan completely intensifies and produces one of the nastier debris signatures of the day and the nastier velocity signatures there's that tornado on reflectivity you can see that debris ball and that debris being lofted right there and here's that velocity couplet very intense just north of pig saw and here we go that velocity signature and that debris ball are still very much evident um you can see it continues off towards flat rock now if i go back here and i try and get a gate to gate shear let's just go ahead and take that and that so 192 not delta velocity that's 121 mile an hour over 99 so we're at we're at over 200 so like around 210 a gate to gate a mile an hour gate to gate sheer as this thing moves off towards flat rock you can see it's still very much intense 197 not delta velocity out here so that's 137 on top of 89 so around the same but very very intense and this thing moves off towards trenton still on the ground you see that the bree ball is still very much there as it crosses over into georgia near trenton it continues continues to produce and there's there's that debris ball still very much evident right there and it aligns with that velocity as we as we continue to go over and still very much on the ground as it goes through chattanooga valley ef3 damage was located here nothing was on the ground for a while unfortunately this thing goes out but you can see more rotation begin to develop near uttowa and this is where it cuts out but this thing actually did produce an ef4 tornado north i believe in the city of cleveland cleveland tennessee this thing goes on to produce another ef4 it cuts out again if we look out here towards the stevenson area in the bridgeport area this thing you can see there is that velocity that last velocity we get rotation there and there's that hook echo beginning to develop now this thing actually did produce an ef4 as well in bridgeport but this thing cuts out right as we go and get to see what this thing produces so it cuts out so we're actually going to go ahead and take a look at the next batch we have and this is going to be our storms out there in the atlanta area uh or this is south of the atlanta area my bad so this was this was the cells that tracked south of birmingham in the aft in the afternoon and these went on to produce some even more intense tornadoes are not even more intense but some more intense tornadoes in georgia central georgia so we see an ef1 tornado touches down right here let's get a storm uh storm out of velocity on this thing and there we go there's that tornado and so this thing moved up towards corinth and there's your velocity right there there's your velocity couplet and it's hard to see on reflectivity but there's a tornado there so these cells really begin to mature as they push off to the north and east that cell begins to again it looks like probably go over some trees or some homes and there is our debris ball on reflectivity you can see those purple values that's debris being lofted by this tornado and you can literally see the velocity and the debris ball they very much align now this storm down here really begins to intensify once more you can see that that rotation intensifies and an ef-2 tornado does touch down here that is our rotation and that is our debris ball on radar um and so you can really see that presentation um let's see a path length of seven miles so we'll continue to go off you can still see it's very much there there's that velocity again this tracked right on over i 185. and these storms began to really intensify this northern cell did not do much but this storm intensifies and you see this storm to the south is beginning to intensify as well you can see that mesocyclone really begins to develop out there south of whitesville georgia and that beer really becomes dominant that strong updraft that donut hole right here and this thing i believe produces in the next scan out here near hamilton are the next two scans yeah so this is where the tornado uh begins to touch down your mountain valley and this thing i believe this thing was an ef2 i'm probably likely much stronger and you can see that velocity intensifies right there and here's where it's at its most intense i believe in its life stage as it moved up towards warm springs uh so let's see there's 157 knot delta velocity um so 72 mile an hour on top of 108 that's almost 200 uh that's almost 200 mile uh gate to gate shear i believe that's around 180 so probably into the violent range i would assume let's take a 3d on this thing see if we can take a look at the tornado i can't really see it not very evident there a next scan though uh there is your tornado you can see it's this is depicting a wedge a wedge-shaped tornado right there there it is boom boom and let's go ahead and take this back on over to the radar yep there we go and this is still very much intense inflow is continuing to shoot into this thing and it tracks off to the east over towards north of manchester still very intense velocity couplet right there this thing still very much has a debris ball on the reflectivity as well and that is where it begins to lift now if i take you back on up we had another intense tornado develop up here and there is that hook echo that classic hook echo on this and i mean we saw this all too much during this day um east of uh elevation georgia and there is that velocity very very intense um right there and you can just see that hooking shape to it again there's that debris ball starting to pop up right there you see this thing was given an ef3 140 mile an hour winds on this thing uh given by the national weather service um and we can take a gate to gate shear on this thing 135 four mile an hour uh our 134 not delta velocity that's 61 mile an hour on top of 92 so around 150 mile an hour gate to gate shear on this tornado as this moved up towards sunnyside you can see that debris wall really really deep and that is your tornado so actually i'm going to see if i can see this thing on 3d why not and there we are there it actually is on 3d so if we go ahead and outline that there is our tornado touching down looks like a wedge shape via the 3d mode again let's move on you can see really as it goes over to sunny side um just incredible let's take another 3d and you can see right over sunny side huge tornado depicted on 3d looks like a wedge and you can see that debris ball on reflectivity right there we'll smooth that out that is all your debris being lofted that those those purples right as it goes over sunny side on us 19. tracks off and that is where it begins to lift now down here to the south another intense tornado begins to develop out here near barnesville and this is uh let's let's go ahead and we have to pull up our here we go and this is as intensifies and now this is widely believed to be in the violent range it just didn't hit much to get that rating but this is widely believed to be an ef4 maybe even ef5 tornado as it went through barnesville now if we take a look at this two panel look once again so we can get that that dual look at it if we take a place place a marker and get that storm relative velocity real quick there we go so you can see this thing really intensifies over piedmont this is 140 mile an hour ef-3 this killed two people out there near barnesville and as it went right through barnesville you can see this velocity really intensifies and there is your debris ball on radar another classic hook echo with the debris ball and this keep in mind this was in the nighttime hours so these things were not visible at all to the human eye unless there was lightning now if we take a quick look we're going to do a 3d and a gate to gate shear on this thing so you can see around 176 uh not delta velocity that's 104 mile an hour on top of 199 so around 200 mile an hour delta velocity that would be very indicative of a violent tornado now if we take a look at this thing on 3d and there we go there is our tornado near barnesville this thing looks like a wedge on here as it goes off again see there again is extremely strong on that velocity with the new velocity let's take a look again 171 167 so 171 mile an hour delta velocity that's 86 on top of 111 so that's well that's well over 200 mile an hour a gate to gate shear on this thing continues to track off towards flavilla you can see that thing is still deep as it goes off and there's that velocity signature there's a look at the last one as i skipped over that a little quick still going off and eventually i mean it's still a debris ball right there but eventually this thing does uh lift and then as we continue to track on up here near madison another tornado touches down i believe this one a couple buildings were destroyed and it touches gown yet again maybe no it doesn't so that was it for the night on these on this those eastern storms now for the last look at the day we're going to take you on over to these storms so this right here this is a look at one of our ef4s now here it does not look like much but when we take it to this scan right here and this this is all we have to look at for this one we take this scan right here it's very very hard to tell because it looks like a a decently put together supercell but nothing too impressive this right here right on the end of this right there and right there this was actually an ef4 tornado a high-end ef4 almost nearing the ef5 range and you wouldn't really believe it by looking at that but again there's the rotation so that was a look at that that was a high-end ef4 um now taking this off we have another uh look at uh some strong tornadoes up here in tennessee and this thing was a widespread event uh this thing uh was over multiple states we again as you saw in the beginning this expanded up all the way up into new york but here's a look at this up near enough you can see a tornado touched down out here near hot springs but this thing as it goes off to the northeast begins to really really intensify you can actually see this thing really develops right here this is where that couplet intensifies i believe this was an ef-3 five fatal doesn't tell the rating but this was a five fatality uh tornado that is a really intense velocity coupler just south of tusculum this was out in camping ground area i believe as we go off another scan this thing continues to track off to the northeast but with this last game i'll actually see if we can see anything on 3d i doubt we will be able to yeah nothing really visible on 3d as i expected here's that couplet again as it tracked over state route 351 and this thing actually recycled and produced an ef-3 tornado i believe out here so there's a look at that it really continues to intensify there's our velocity couplet and with this next scan we get that tornado report i believe an ef2 two fatal yeah this is a fake a fatal ef2 with 120 mile an hour winds as you go off these storms are really um not all too impressive and that is a look at the event overview at the end of the day we had over 300 fatalities unfortunately just an incredible incredible weather event and my heart goes out to all the families that suffered all the homes lost all the lives lost anyone who lost a family member my heart really goes out to them this was a very historic day um and one last time i will pull up the storm reports after looking at that you can see these storms really really tracked over a large large area and uh just a very historic day and unfortunate uh unfortunately we will probably have a day like that day sometime in the next 20 years um and uh hopefully it's it's a long long way away we don't have to deal with something like this ever again um uh but this was this was the generational tornado outbreak the super outbreak 427.11 and that was our complete overview and detailed analysis um of this event uh consider giving me a like and a subscribe if you did enjoy this video we do live severe weather coverage as well we do in-depth coverage live whenever events are going on share this video with your friends if you did enjoy anyone who enjoys meteorology i'm sure will love this in-depth this in-depth video and i'm glad i could do it with you this is the most in-depth one you'll find on youtube so consider consider sharing liking and subscribing and thank you guys all for being here if you were here on the stream with us and for those of you who are watching this on a video i hope you enjoyed and

Channel: TornadoJakeStudios

Views: 7,789

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Id: Dgyog6X_KmQ

Length: 69min 25sec (4165 seconds)

Published: Thu Apr 01 2021