Analysis of Droughts in the Central Region of South Africa and Their Association with SST Anomalies

Table 3

Relative frequency of drought events at C52A quaternary catchment.

Drought category	SPEI-3	SPEI-6	SPEI-12
Extreme drought	2.55	2.88	2.68
Severe drought	11.90	12.68	10.71
Moderate drought	20.40	19.31	24.70
Mild drought	65.16	65.13	61.90