TVS

T ornadic V ortex S ignature. Doppler radar signature in the radial velocity field indicating intense, concentrated rotation - more so than a mesocyclone . Like the mesocyclone, specific criteria involving strength, vertical depth, and time continuity must be met in order for a signature to become a TVS. Existence of a TVS strongly increases the probability of tornado occurrence, but does not guarantee it. A TVS is not a visually observable