The most significant advancement in weather radars over the last two decades is polarization diversity, so much so, that the US National Weather Service is introducing this capability to its national network of Doppler radars. Introduction of dual-polarization brings new information that can be used for separating signals from noise. Classical approaches apply thresholds on estimated signal-to-noise ratio (SNR) and/or the magnitude of autocorrelation coefficient at lag one. Because the weather signals from the two orthogonally polarized electric fields are highly correlated this feature can...