Probably lucky there were only single digit fatalities in this case, that thing is a beast.
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Significant Tornado Events - Global Edition
- Thread starter atrainguy
- Start date
Probably lucky there were only single digit fatalities in this case, that thing is a beast.
Central Ohio Wx
Member
Alright, I’ve been mapping out the Guarapuava F3 via image overlaying and geolocation and I will say that I am 100% sure it was stronger than the Rio tornado. Some things I’ve found:
- Evidence of debarked trees (can’t remember the name) that are reportedly stronger than Mesquite trees
- Significant cycloidal scouring in a field SW of Guarapuava
- Large metal object (combine-ish) crumpled and appears to have been possibly wrapped around a pole
- A triangular grove of trees S of Guarapuava was literally erased off the map, while the imagery isn’t sharp the grove disappeared between October 23 and November 12 imagery
- Scouring as the tornado moved into the Nova Geracao community
- Possible evidence of rapid intensification near the end of the tornado’s visible path, with a (separate from the above) grove of trees being destroyed in a flared-out fashion. Not 100% sure whether this is tornadic or not.
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Lake Martin EF4
Member
That first point...if that's accurate, I think a new unofficial F5 candidate just dropped.
Ivanthetornadoenthusiast
Member
Apparently there was a killer tornado in Jepara, Central Java on December 2nd, 1925
WeathermanLeprechaun
Member
Would the tree species be Ipe or Cumaru? They're both tree species that are stronger then mesquite, ranking high on the Janka hardness. If debarked/completely debarked, that is very impressive.
FelipeFreitas
Member
The tornado in Guarapuava has been updated to an F4 rating
Lake Martin EF4
Member
And just like that, 2025 is now the most violent year since...shudders...2011.
Central Ohio Wx
Member
2013, which had nine EF4s and one EF5.
Lake Martin EF4
Member
I forgot 2013 had that many violent tornadoes, holy excrement
Here’s some official survey information regarding the rating process and rationale for the two F4s in Brazil. Interestingly, PREVOTS consulted with NWS Norman, specifically Jim LaDue and Raven Vasquez, for guidance when it came to rating the tornadoes.
Rio Bonito do Iguacu:
The F4 rating came down the total destruction of numerous reinforced masonry structures, including multiple homes and businesses, a church, and a school. Surveyors noticed that reinforced concrete support columns were twisted and broken at some of the destroyed structures. In addition, violent tree damage occurred.
Guarapauva:
The F4 rating was apparently not based on structural damage. The rating largely came down to extreme tree damage and ground scouring. A massive swath of trees was mowed down in a dense forest, with debarking and root-balling observed. Severe ground scouring occurred, with removal of surface vegetation and soil noted. In addition, a large metal storage container was lofted, thrown 165 m, and mangled (this is likely the crumpled object found by @Central Ohio Wx in aerial imagery). The tornado also did cause major damage to masonry homes, but there’s no mention of any of the structural damage being rated F4.
Rio Bonito do Iguacu:
The F4 rating came down the total destruction of numerous reinforced masonry structures, including multiple homes and businesses, a church, and a school. Surveyors noticed that reinforced concrete support columns were twisted and broken at some of the destroyed structures. In addition, violent tree damage occurred.
Guarapauva:
The F4 rating was apparently not based on structural damage. The rating largely came down to extreme tree damage and ground scouring. A massive swath of trees was mowed down in a dense forest, with debarking and root-balling observed. Severe ground scouring occurred, with removal of surface vegetation and soil noted. In addition, a large metal storage container was lofted, thrown 165 m, and mangled (this is likely the crumpled object found by @Central Ohio Wx in aerial imagery). The tornado also did cause major damage to masonry homes, but there’s no mention of any of the structural damage being rated F4.
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Questions for @FelipeFreitas: PREVOTS has done a great job at mapping out and surveying the 11 tornadoes in Brazil, however, I am trying to find official documentation and information about the two tornadoes in Argentina, and the one tornado in Uruguay. Do you have any links or info on these three tornadoes that occurred outside of Brazil? Any details would be greatly appreciated.
Also correct me if I’m wrong, but it seems a total of 14 tornadoes were confirmed from this outbreak?
Central Ohio Wx
Member
I became aware of the metal container that was set aloft after I looked at a video from the Nova Geracao community (which is where it was resting, I didn't know the container was lofted and the damage doesn't look particularly intense which is why I never mentioned it); the object I'm referring to is in the same community but was green-ish and bulky. Almost looked like a combine getting crumpled inward. I'll see if I can find the video.
souda
Member
The tornado in Paraguay occured over a reservation and it was not surveyed.
Argentina had a tornado in Campo Grande/25 de Mayo, another in San Pedro, and the other one started in Bernardo de Irigoyen and ended in Brazil. Apart from latter, no information is available about the others.
About Guarapuava, the most severe damage was observed west of Serra do Cadeado. Serra do cadeado had masonry houses distroyed, but vegetation around them was not as severely damaged, raising questions about the quality of the buildings. Only exception was where the container became airborne, as shrubbes were denuded and ground scoured.
Interested to see the other object. Sounds like multiple heavy objects were thrown.
Great information and detail here. Just curious, were you involved in the survey at some capacity?
souda
Member
I'm a member of PREVOTS, and my colleagues went there to survey. We found more stuff today as the Guarapuava tornado made a b-line for a mansion that was extremely well built and was partially destroyed, together with the annihilation of a forest behind it. There will be a lot of work put into the final rating of these tornadoes.
Central Ohio Wx
Member
I'll have to find the video itself, but it's definitely existent somewhere.
Nevermind, found it:
The pole in the background is where I got the assumption they may have been in contact came from, although re-looking this is probably false (when I meant "wrapped", I didn't mean it had been completely wrapped around a pole, more than it came in contact and fell, which is my bad). No idea what this machine is used for or how bad the damage is.
Here's the container in the same video:
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Very cool to hear it directly from the source.
FelipeFreitas
Member
In Brazil, 11 tornadoes have been confirmed. I haven’t seen any research from neighboring countries, and I think they usually only report events when the tornado is very intense.
Central Ohio Wx
Member
Currently working on overlaying satellite from the Guarapuava tornado. I would have attached images, but TalkWeather keeps telling me that my single-image message is too long.