Observations of hail cores of tornadic thunderstorms with three polarimetric radars
Polarimetric characteristics of hail cores obtained at three radar wavelengths are compared. Differences in differential reflectivities, the differential phases, and correlation coefficients are discussed. It is shown that the differential phase upon scattering can be used for hail indication at X band.
The differential Doppler velocities (DDV) defined as the difference of velocities measured at horizontal and vertical polarizations is also discussed. Images of DDV from these thunderstorms show that this parameter can be used for identifying areas of the main inflows. The inflow areas can be identified even in cases where the main inflow is orthogonal to the radar beam so that the Doppler velocity cannot be used to recognize it.