A pseudo-RHI of UMass X-Pol (a) uncalibrated equivalent reflectivity (in dBZe), (b) Doppler velocity (in m s-1), (c) Zdr (in dB), and (d) ρ ̃_hv (unitless) at an azimuthal angle of 13.0 degrees (clockwise from north; see Fig. 7), slicing through the Greensburg tornado during its mature phase at 0226-0228 UTC. Note the northward tilt of the WEC with height, the horizontal vortex / reflectivity curl in the echo overhang (dashed circle), debris signature near the bottom of the WEC, and relatively high reflectivity values near the surface on the far side of the vortex, where large drops are indicated by the presence of the Zdr arc.
A pseudo-RHI of UMass X-Pol (a) uncalibrated equivalent reflectivity (in dBZe), (b) Doppler velocity (in m s-1), (c) Zdr (in dB), and (d) ρ ̃_hv (unitless) at an azimuthal angle of 13.0 degrees (clockwise from north; see Fig. 7), slicing through the Greensburg tornado during its mature phase at 0226-0228 UTC. Note the northward tilt of the WEC with height, the horizontal vortex / reflectivity curl in the echo overhang (dashed circle), debris signature near the bottom of the WEC, and relatively high reflectivity values near the surface on the far side of the vortex, where large drops are indicated by the presence of the Zdr arc.