Amalgamation of Vorticity from Inflow Horizontal Wind Shear

Inflow jet influenced by Coriolis force Inflow jet with localized roll up
Inflow jet influenced by Coriolis force Inflow jet with localized roll up
Start of amalgamation process Organized center of vorticity
Start of amalgamation process Organized center of vorticity

Potential Acoustic Radiation Mechanisms from Tornadoes

Radial vibration Co-rotating vortices
Radial vibration Co-rotating vortices
Boundary layer turbulence "Organ pipe" resonance
Boundary layer turbulence "Organ pipe" resonance

Conceptual View of One Possible Process for Tornado Formation

Center of vorticity carried into convective region Vertical advection of circulation
Center of vorticity carried into convective region Vertical advection of circulation
Downdraft evolves Vortex stretching and concentration of angular momentum
Downdraft evolves Vortex stretching and concentration of angular momentum