Abstract
The article compares several methods for the detection of hail with single-polarization radars. First, information about hailfalls from the ground stations in the Czech Republic is briefly summarized.
Afterwards, five selected methods (55 dBZ, Auer, HailProb, VIL density and POSH) were tested in two well documented hail events in the Czech Republic, which occurred on 23 July 2003 and on 9 June 2009. Data from the two Czech weather radars Brdy and Skalky were used.
It is concluded that all five tested methods are able to detect hail. Generally, all methods performed well with both studied hail events.
The hail on 9 June 2009, which occurred in the night, was well reflected by radar criteria. The detection algorithms exceeded the threshold over the hail area on 23 July 2003 with hail occurrence during the day.
However, the hail was also identified out of the sub region, where we have no evidence about hail occurrence.