Documental sources and categorization techniques were used to construct a s
eries of the annual hail intensity in Mendoza area (Argentina). When the te
mporal series by means of Singular Spectrum Analysis (SSA) and the Maximum
Entropy Method (MEM) was analyzed, we found interdecadal oscillations of pe
riods of about 20 years and interannual oscillations of about 4 and 9 years
. In addition when detrented-data were used a low frequency oscillation of
about 72 years also appears.