Why do tornadoes form condensation funnels?

[Raymond Mason]

Hey guys, I have been wondering, why do tornadoes form codensation funnels? I don't know the physics or science behind it but I just don't get it. I know not all tornadoes have condensation funnels but more often then not there is one.

I mean tornadoes are just wind, straight line winds and hurricanes don't form condensation around their winds. What makes a tornado have that condensation even when rain wrapped?

 

[JF Massicotte]

T think that the lower pressure as you get closer to the center of the tornado brings the air inside it to condensation (the air gets adiabatic elevation as pressure drops). Whether or not it will produce condensation will mostly depend on the T/Td of the air entering the tornado and the pressure inside the tornado itself.