edit(note i found it look at the last stuff)
edit5(https://www.weather.gov/oun/events-19550525-stormelectricity) A page for it from the Official NWS
Lets start off that there were 2 F5 on the ground from the same supercell
part of Edit 4
The first one however seems very alien like , a Tube shape Tornado , however having a bright light in its core , the Tornado appeared to be Floating off the ground by 40 Feet?. edit2(20 feet)
At times St. Elmo’s Fire came out of its strange floating gaping like hole of a base it had.
It also at times had a strange band 100 feet thick of glowing blue light but not vericale but more horozontal.
It also had strange bunch of ball lightning? orbiting it like a bunch of creepy UFO or a Ring
Overall look of this tornado.
Trying to find the original desc i remember seeing this , if i find it il post it
The Next F5 did some of the most severe damage
Numerous homes and businesses were destroyed, many of which were swept away. Vehicles were thrown hundreds of yards and mangled beyond recognition, including a pickup truck that was wrapped around a tree and stripped of everything but its frame and tires.
There were strange glowing lights seen in one of the 1974 April 4 Tornadoes
and one of the F5 that almost got a F6 rating in Birmingham.
Edit1(Found the original Description of it )
edit 3(a other found)