the funnels in my kitchen are also nested

I wrote a while ago about tornados with nested funnels, but a few days ago I found this lovely example on Bluesky.

This seems to be the same storm filmed by a different chaser. The video is four-plus hours long. Starting around 2:23:00, there are three different interacting vapor funnels: a large "hollow" funnel, and two smaller funnels within it, stretching to meet each other like a stalagmite reaching for its stalactite.

I still don't know what's happening with these things. A comment at the video calls it a "deposition-driven tornado":

@k.chriscaldwell4141
2 months ago
This is a deposition driven tornado. Watch at 02:27:21 to 02:27:54. Its engine is shifting higher into a lower pressure, and colder altitude, in its meso. Hence its shape narrows. Its deposition driven engine then continues to oscillate down and up in its meso, thickening and then thinning as it does so.

The rope stage of tornados takes place very high in the meso. Strange how this one goes rogue and runs off to the SW. possibly the tornado’s side-updraft feeder significantly weakened allowing its engine to wander free as it sputtered to an end. Very bizarre.

An awesome and scientifically significant video. Thank you.

[...]

@k.chriscaldwell4141
1 month ago
It’s not shedding. Its outer tornado’s engine is losing strength. It’s at least [two?] tornados, a complex tornado, in one: A lower (outer) broad, tube-shaped cold-freezing one, and a higher (inner) rope-shaped freezing-zone one. At 02:27:31 thru 02:27:38 you can see the inner tornado was already present inside the other.

Deposition is the direct change of water vapor to ice, skipping the water stage. Cone, stovepipe, tube, and rope-shaped tornados are driven primarily by deposition. Wedge-shaped tornados are driven primarily by condensation. The latent heat released in both processes is what drives tornados.