Severe Weather Threat - May 6, 2024

[Kds86z]

That's why I quoted your post.

Oh haha, I’m sorry. I’m out of it

 

[Maxis_s]

https://mesonet.agron.iastate.edu/wx/afos/p.php?pil=PNSTSA&e=202405171507
Barnsdall tornado now estimated at 170-180mph based on a home SW of town.

 

[Tomcats Forever!]

Barnsdale has been added to the DAT

Edit: the EF4 home according to DAT

https://services.dat.noaa.gov/arcgis/rest/services/nws_damageassessmenttoolkit/DamageViewer/FeatureServer/0/3991161/attachments/2404199

 

[Tomcats Forever!]

And a closeup of the foundation of the house southwest of town that got smeared

https://services.dat.noaa.gov/arcgis/rest/services/nws_damageassessmenttoolkit/DamageViewer/FeatureServer/0/3997289/attachments/2410622

 

[vanni9283]

And a closeup of the foundation of the house southwest of town that got smeared

https://services.dat.noaa.gov/arcgis/rest/services/nws_damageassessmenttoolkit/DamageViewer/FeatureServer/0/3997289/attachments/2410622

Don't know what to make of those nuts/bolts.

 

[TH2002]

Don't know what to make of those nuts/bolts.

The bolts and washers did their job of keeping the sill plates attached to the foundation. Based on the CAP aerial photo, the tornado essentially lifted the rest of the home off the foundation, resulting in it sliding and collapsing - partial failure of the concrete blocks underneath the home likely played a part as well. Not what one would call great construction, but there was presumably enough anchorage for a violent rating.

Just goes to show how thorough NWS Tulsa was with the survey. This tornado would have very likely achieved only a high-end EF3 rating if it happened in 'certain' NWS forecast areas.

 

[vanni9283]

The bolts and washers did their job of keeping the sill plates attached to the foundation. Based on the CAP aerial photo, the tornado essentially lifted the rest of the home off the foundation, resulting in it sliding and collapsing - partial failure of the concrete blocks underneath the home likely played a part as well. Not what one would call great construction, but there was presumably enough anchorage for a violent rating.

Just goes to show how thorough NWS Tulsa was with the survey. This tornado would have very likely achieved only a high-end EF3 rating if it happened in 'certain' NWS forecast areas.

Also a lot of cinderblocks, which take quite a bit of force to move.

 

[TH2002]

Also a lot of cinderblocks, which take quite a bit of force to move.

Depends on the scenario. If a home is an unanchored slider, the house starts to go, then the cinderblock foundation fails underneath and the structure essentially pancakes. Doesn't take a violent tornado to destroy an unanchored or poorly anchored home.

Now, if we're talking about the blocks themselves actually being thrown, then yes. Smithville and Mayfield went a step further and actually broke/granulated cinderblocks into small pieces, which is very impressive.

 

[Kds86z]

The bolts and washers did their job of keeping the sill plates attached to the foundation. Based on the CAP aerial photo, the tornado essentially lifted the rest of the home off the foundation, resulting in it sliding and collapsing - partial failure of the concrete blocks underneath the home likely played a part as well. Not what one would call great construction, but there was presumably enough anchorage for a violent rating.

Just goes to show how thorough NWS Tulsa was with the survey. This tornado would have very likely achieved only a high-end EF3 rating if it happened in 'certain' NWS forecast areas.

So true, in regards to the thorough ratings by Tulsa nws. I guess it depends where a violent tornado happens these days to get rated correctly.

 

[TH2002]

So true, in regards to the thorough ratings by Tulsa nws. I guess it depends where a violent tornado happens these days to get rated correctly.

Yep, as other users have pointed out on this site before, the accuracy of a tornado's rating these days is unfortunately entirely dependent on which WFO it happened in. Matador, for example, would have likely achieved at least a mid EF4 rating if it happened in NWS Jackson, Norman or Tulsa's WFO.

 

[vanni9283]

Yep, as other users have pointed out on this site before, the accuracy of a tornado's rating these days is unfortunately entirely dependent on which WFO it happened in. Matador, for example, would have likely achieved at least a mid EF4 rating if it happened in NWS Jackson, Norman or Tulsa's WFO.

Just no consistency with how the EF-scale is applied anymore nowadays.

 

[Kds86z]

Yep, as other users have pointed out on this site before, the accuracy of a tornado's rating these days is unfortunately entirely dependent on which WFO it happened in. Matador, for example, would have likely achieved at least a mid EF4 rating if it happened in NWS Jackson, Norman or Tulsa's WFO.

So true. Jackson is good also, and yes of course Norman.