What is Going on Inside a Tornado?

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    Tornado
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Discussion Overview

The discussion revolves around the internal dynamics of tornadoes, exploring the nature of airflow, motion, and the physical principles involved. Participants express varying levels of understanding and seek clarification on the mechanisms at play within a tornado.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant proposes that a tornado is a column-shaped pocket of gas with low mass density, speculating on the role of centripetal force in maintaining its structure.
  • Another participant shares links to external resources that may provide additional information about tornadoes.
  • A participant references the film "Twister" as a visual representation of what a tornado looks like internally.
  • Questions arise about whether air from the ground is effectively draining upwards into the storm cloud, with some agreement on this notion.
  • There is a comparison made between the motion of water draining in a sink and the upward motion of air in a tornado, with the distinction that gravity drives water while warm air drives the upward motion in tornadoes.
  • Concerns are raised about the differences between the vortex in a sink and that of a tornado, particularly regarding the motion of the central portion and the surrounding air.
  • A participant questions whether there is an analogous boundary in a tornado similar to the distinct media in a sink vortex.

Areas of Agreement / Disagreement

Participants express uncertainty and differing interpretations regarding the internal mechanics of tornadoes. There is no consensus on the exact nature of the airflow and the comparison to sink vortices remains contested.

Contextual Notes

Participants acknowledge gaps in understanding and express the need for further clarification on the dynamics of tornadoes, particularly regarding the motion of air and the structure of the vortex.

dimensionless
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My best guess is that a tornado is a column shaped pocket of gas with a low mass density. Usually such a pocket would collapse in on itself, but in this case it is held open by centripetal force.

I'm just speculating about something I don't understand. Can anyone offer up a good explanation? What types of motion are involved? How well is all this understood?
 
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Here's a few sites that might be of help:

http://www.howstuffworks.com/tornado.htm

http://www.usatoday.com/weather/resources/basics/2003-05-05-basics-tornadoes_x.htm

http://www.nssl.noaa.gov/NWSTornado/
 
Didn't you see Twister?? That is what a tornado looks like on the inside.
 
I looked at the links but I'm still not to sure what's going on. Is air from the ground effectively draining upwards into the storm cloud?
 
dimensionless said:
I looked at the links but I'm still not to sure what's going on. Is air from the ground effectively draining upwards into the storm cloud?
Kinda, yeah.

It's the same effect that causes water in the sink to swirl as it goes down the drain. However, whereas gravity is the engine driving the water down the drain, in the case of a tornado, it is air warmed over land that is the engine driving the air upwards.
 
But in a sink the airy center of the vortex has no up or down motion. It's the water around it that moves. Judging from videos it appears that in a tornado the central portion flows upward and the air surrounding it is motionless. Is it merely the outside wall of the funnel cloud that moves upward?

Also the vortex in a sink has two very distinct medias. Can one draw an analogous boundary in a tornado?
 

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