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I think Canada is pretty conservative on how they rate their tornadoes.
They've had that reputation for awhile, there was an article on Edmonton that mentioned that, some surveyors wanted to go with F5 but ultimately high-end F4 was decided. Similar to quite a bit of tornadoes in the U.S. under the EF scale, really.
 
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Not sure if you're familiar with these sites, but I recommend them, despite how they haven't been updated in years. Both have lots of hard to find photographs of tornado damage & extreme planet has interesting articles on the Tuscaloosa controversy and such:

1. https://extremeplanet.me/

2. https://stormstalker.wordpress.com/
Had the Greensburg tornado had happened on May 4, 2006 it barely would have gotten an F4 rating on the F-scale.
This discussion is interesting. Honestly, for modern-day tornadoes that are overrated I think Greensburg should've been given an EF4 rating instead of the EF5 it got, but who knows?
I doubt the Greensburg tornado would have gotten much more than an F4 rating on the F-scale had it of happened a year earlier. The EF5 rating is extremely minimal at best.
 

pohnpei

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Had the Greensburg tornado had happened on May 4, 2006 it barely would have gotten an F4 rating on the F-scale.
I doubt the Greensburg tornado would have gotten much more than an F4 rating on the F-scale had it of happened a year earlier. The EF5 rating is extremely minimal at best.
The rating map of Greensburg showed there were two places rated EF5 before it entered the town and the EF4 aera was also larger at this place. So there was a chance that the tornado peaked before it entered the town.
The house damage in town varied a lot from one house to another but the contexual damage especially the tree damage was quite outstanding overall.
16-04-57-057.png
 
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pohnpei

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These 2 links got some good information on it:

1. https://www.weather.gov/fsd/19920616-tornado-chandlerlakewilson

2. https://www.mnopedia.org/event/chandler-lake-wilson-tornado-1992

A few pics of note:

View attachment 3583

A vehicle stripped to it's frame and a house that more or less vanished on the edge of town. The tornado's lone fatality occurred here at this location:

View attachment 3582

Some possible ground scouring but I'm not sure. Quite a few pics of the damage have combine harvesters next to brown soil so it could be already plowed but not sure.

The only known video footage of it:


These house damage in NWS website almost certainly can't be rated EF5 nowadays but based on the tree damage, vehicle damage and potential ground souring, the potential was there.
 

pohnpei

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I was actually surprised when Moore was (correctly) rated EF5 after Chickasha and Goldsby. There hasn't really been a tornado of that magnitude (in terms of leaving EF5-hallmark DIs) in central Oklahoma since. Controversy aside, El Reno '13 just didn't hit enough, and unless I just haven't seen the pictures, didn't even really do a lot of classic "extreme-violent" contextual damage (ground scouring, debarking, vehicle mangling, etc). The TWISTEX Cobalt was probably the worst-damaged vehicle I've seen out of it, and even it was still recognizable as having once been a car.
 

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Yeah, 2013 El Reno isn't comparable to e.g. 2011 El Reno in terms of the contextual damage it caused. 2011 El Reno was an archetypal EF5: large trees completely debarked, grass scoured, vehicles stripped to the chassis. 2013 wasn't on that level.
 
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The rating map of Greensburg showed there were two places rated EF5 before it entered the town and the EF4 aera was also larger at this place. So there was a chance that the tornado peaked before it entered the town.
The house damage in town varied a lot from one house to another but the contexual damage especially the tree damage was quite outstanding overall.
View attachment 3584
I am not saying the Greensburg tornado didn't deserve an EF5 rating. I am just saying it was minimal in comparison to other historic F5 or EF5 tornadoes.
 

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Moore 2013 produced in my opinion, the most intense damage in a densely populated urban/suburban area I have ever seen. More intense than Joplin even. It was a slow-mover and obviously debris-loaded, but in some areas, it produced Jarrell-esque scouring. No joke.

The tree damage, vehicle damage, and debris granulation is also some of the most intense I have ever seen:
u6blGe6.jpg

bIHwIpN.jpg

V4YESMT.jpg

WJ1c6JA.jpg

FH8uero.jpg

EF5Moore2.jpg

mlnBFnf.png
 
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Moore 2013 produced in my opinion, the most intense damage in a densely populated urban/suburban area I have ever seen. More intense than Joplin even. It was a slow-mover and obviously debris-loaded, but in some areas, it produced Jarrell-esque scouring. No joke.

The tree damage, vehicle damage, and debris granulation is also some of the most intense I have ever seen:
u6blGe6.jpg

bIHwIpN.jpg

V4YESMT.jpg

WJ1c6JA.jpg

FH8uero.jpg

EF5Moore2.jpg

mlnBFnf.png
The trees were completely stripped naked of all their bark. It is comparable to a lot of historic tornadoes like Andover, Jarrell, Bridge Creek and a few others. The tree debarking your right it is probably amongst the most intense or the most intense. I heard accounts of trees being stripped to naked stumps from the Tri-state 1925 tornado. The scouring is also very impressive as well. Didn't it scour up to a foot in some areas?
 
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I believe the Moore, Oklahoma tornado on May 20, 2013 was actually rated at least an EF4 without even a damage survey being actually performed. Of course it was obvious though. Also was the Moore 2013 tornado at its widest when EF5 damage occured? It reached 1.3 miles--wide but can't remember seeing any pictures or vid of it being that wide. It looked like it was 3/4 of a mile-wide at most to me but I am probably low balling it.
 
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The trees were completely stripped naked of all their bark. It is comparable to a lot of historic tornadoes like Andover, Jarrell, Bridge Creek and a few others. The tree debarking your right it is probably amongst the most intense or the most intense. I heard accounts of trees being stripped to naked stumps from the Tri-state 1925 tornado. The scouring is also very impressive as well. Didn't it scour up to a foot in some areas?
I’m not sure of the specific measurements in terms of the depth of scouring, but judging by pic #3, it looks to be around a foot deep.
 
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I’m not sure of the specific measurements in terms of the depth of scouring, but judging by pic #3, it looks to be around a foot deep.
It amazes me that only 24 people were killed in this tornado. I remember seeing the damage that day and I thought to myself this tornado may have killed as many people as the Joplin tornado.
 

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I believe the Moore, Oklahoma tornado on May 20, 2013 was actually rated at least an EF4 without even a damage survey being actually performed. Of course it was obvious though. Also was the Moore 2013 tornado at its widest when EF5 damage occured? It reached 1.3 miles--wide but can't remember seeing any pictures or vid of it being that wide. It looked like it was 3/4 of a mile-wide at most to me but I am probably low balling it.
It reached its widest point right after its first two or three EF4 damage point
When it reached peak intensity, it was mainly a 3/4 mile-wide tornado.
 

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Another several pictures in Moore showed ground souring and some parts of vehicle. There was really no need for a collection of completely debarked trees or mangled cars images because it was everywhere. And before it enter the Moore community which may had a debris effect, it already completely debarked trees.
08-08-32-032.jpg08-08-18-018.jpg08-09-43-043.jpg08-08-05-005.jpg
 
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Another several pictures in Moore showed ground souring and some parts of vehicle. There was really no need for a collection of completely debarked trees or mangled cars images because it was everywhere. And before it enter the Moore community which may had a debris effect, it already completely debarked trees.
View attachment 3599View attachment 3600View attachment 3601View attachment 3602
Looks like vehicle damage from other F5/EF5 tornadoes. Such as Andover, Jarrell, Bridge Creek, Smithville, Vilonia, and Chapman. I know the lather two weren't rated EF5 but they are in my books.
 
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Georgia has never had an F-5/EF-5 either.
True, but it's another case of not officially. While it's not as clear cut of a case as Vilonia, at least a couple of meteorologists believed the Ringgold tornado on 4/27/11 was underrated, and should have been rated EF5. If it didn't reach EF5 strength, it certainly came extremely close, and was a very good candidate for the strongest EF4 tornado of the day (other contenders being the Cullman/Arab, Ohatchee, and Tuscaloosa tornadoes).
 
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