Severe WX March 23-25th, 2023

[Timhsv]

Here's another key ingredient to the formation of supercells. Look at those 500mb height falls coming into Arkansas .....120 meters ,and already 60 meters across N.
Mississippi.

 

[ColdFront]

Are those the buffer like things that were the reason Joplin got rated EF5?

I think that, the manhole covers, and maybe the medical center?

What’s crazy is I believe Joplin ripped one of the Parking stops out of the parking lot and it was found so many meters away.

 

[locomusic01]

I think that, the manhole covers, and maybe the medical center?

What’s crazy is I believe Joplin ripped one of the Parking stops out of the parking lot and it was found so many meters away.

Tim Marshall & Co assigned an EF5 rating to 22 houses in Joplin. And yeah, a ton of parking stops were twisted off their anchors and tossed all around the area. I don't wanna go off-topic with photos here but I think I made a post about it somewhere in the Significant Tornadoes thread.

I dunno about this particular case, but in many cases the stops aren't actually anchored. In Joplin most of them were secured with anchors that are basically like lag bolts made out of half-inch rebar, and you could see where the anchors had been twisted in opposite directions as the stops were torn away.

 

[ColdFront]

Tim Marshall & Co assigned an EF5 rating to 22 houses in Joplin. And yeah, a ton of parking stops were twisted off their anchors and tossed all around the area. I don't wanna go off-topic with photos here but I think I made a post about it somewhere in the Significant Tornadoes thread.

I dunno about this particular case, but in many cases the stops aren't actually anchored. In Joplin most of them were secured with anchors that are basically like lag bolts made out of half-inch rebar, and you could see where the anchors had been twisted in opposite directions as the stops were torn away.

That absolutely blows my mind that they found 22 homes to meet their strict criteria, I always kind of looked at those “well built homes” as unicorns. I’ll do some research on that.

 

[locomusic01]

That absolutely blows my mind that they found 22 homes to meet their strict criteria, I always kind of looked at those “well built homes” as unicorns. I’ll do some research on that.

Here's the paper on their survey. Worth noting that this was 22 homes out of 7,200 in total that were surveyed, so still rather selective lol. They mention some of the other contextual indicators of extreme winds very near the surface but officially didn't assign EF5 to any other DIs besides those houses.

 

[Brice]

Here's the paper on their survey. Worth noting that this was 22 homes out of 7,200 in total that were surveyed, so still rather selective lol. They mention some of the other contextual indicators of extreme winds very near the surface but officially didn't assign EF5 to any other DIs besides those houses.

Thought y’all were talking about rolling fork, until I saw it was about Joplin, almost made me pass out.

 

[akt1985]

Just like with Mayfield, the Rolling Fork EF4 was not in a PDS Tornado Watch. Why is the SPC cutting back on issuing PDS watches?

 

[tornado examiner]

The evidence that several concrete sidebars was moved in rolling fork.
View attachment 19210View attachment 19211

We’re they anchored? Or just loose?

 

[ColdFront]

Just like with Mayfield, the Rolling Fork EF4 was not in a PDS Tornado Watch. Why is the SPC cutting back on issuing PDS watches?

Someone posted an excellent tweet from someone at the NWS basically talking about how they’re a little hesitant on high risks and only want to put them out when a high end outbreak is not only possible, but probable as to not desensitize the Public.

On the matter of PDS, I don’t think the probabilities met the criteria for it. They issued TOREs in excellent time though. There was some debate that Paducah/NWS was late on the Mayfield TORE. I would put more stock in the fact they were on top of it, even when the rolling fork cell was a bit of distance away from the radar and got the warnings out right away.

 

[tornado examiner]

I’m surprised there haven’t been any new additions to the dat for march 24th. Why do they post a few points and then just don’t update it for a full day or so?

 

[JBishopwx]

I’m surprised there haven’t been any new additions to the dat for march 24th. Why do they post a point points and then just don’t update it for a full day or so?

My guess is they haven't gotten around to it today, especially since we had another severe event.

 

[tornado examiner]

Also does anyone know where Wikipedia is getting these stats from for this tornado? As far as I know nws Jackson hasn’t made an update and nobody else has mentioned it. These stats have been up for some time too

 

[JBishopwx]

Also does anyone know where Wikipedia is getting these stats from for this tornado? As far as I know nws Jackson hasn’t made an update and nobody else has mentioned it. These stats have been up for some time too

Jackson made a tweet, and I saw someone posted it here yesterday. Also, it's available online at https://www.weather.gov/jan/2023tornadoinfo

 

[tornado examiner]

Jackson made a tweet, and I saw someone posted it here yesterday. Also, it's available online at https://www.weather.gov/jan/2023tornadoinfo

Oh okay.

 

[TH2002]

Planet has released aerial imagery of Rolling Fork. Definitely some structures (duplex, beauty supply store, salon and a few homes) swept off their foundations along with some moderate wind rowing on the northeastern edge of town. While I don't think this tornado is an EF5 candidate, I believe it probably had EF5 winds at some point.

(Click for full resolution)

 

[tornado examiner]

Planet has released aerial imagery of Rolling Fork. Definitely some structures (duplex, beauty supply store, salon and a few homes) swept off their foundations along with some moderate wind rowing on the northeastern edge of town. While I don't think this tornado is an EF5 candidate, I believe it probably had EF5 winds at some point.

(Click for full resolution)

Agreed. This was no ef5 in the terms that is can be rated such. But it is definitely a solid low to mid range ef4

 

[pohnpei]

Planet has released aerial imagery of Rolling Fork. Definitely some structures (duplex, beauty supply store, salon and a few homes) swept off their foundations along with some moderate wind rowing on the northeastern edge of town. While I don't think this tornado is an EF5 candidate, I believe it probably had EF5 winds at some point.

(Click for full resolution)

yeah, other than north portion area of the town. The damage in Indian bayou area also strong.
Other than very severe debarking, the amount of vehicles tossed and carried out here was also impressive.


Also severe damage outside of the town to northeast position.

 

[tornado examiner]

An ef0 polygon for the armory tornado was uploaded to the dat and is now removed. That’s not uncommon but it’s still weird to me

 

[KevinH]

Right next door

 

[tornado examiner]

The amory tornado is up on the dat. The track is at least