Standardized Precipitation Index

Name: Diccionario Meteorológico y Climático
Author: José Miguel Viñas
ISBN: 979-13-7009-067-8

Standardized index used in Climatology mainly as a drought indicator, which for a given location expresses the probability of a certain amount of rainfall occurring, based on the climatology of that meteorological variable. It is known internationally by the acronym SPI (Standardized Precipitation Index).