EDO Standardized Precipitation Index E-OBS, 3-month accumulation period (SPI-3) (version 2.0.0)

The 3-month Standardized Precipitation Index (SPI-3) is an indicator used to monitor meteorological drought based on precipitation anomalies over 3-month accumulation periods. SPI-3 serves as a proxy for medium-term impacts, such as reduced stream flow and reservoir storage. The input data for calculating the SPI-3 is E-OBS (ECA&D (European Climate Assessment & Dataset) observational dataset), version 30.0e.