The 24-month Standardized Precipitation Index (SPI-24) is a meteorological drought indicator to monitor precipitation anomalies over 24-month accumulation periods and is a proxy indicator for long-term impacts, for example reduced reservoir and groundwater rec...

The 3-month Standardized Precipitation Index (SPI-3) is a meteorological drought indicator to monitor precipitation anomalies over 3-month accumulation periods and is a proxy indicator for immediate impacts of droughts, such as reduced soil moisture, snowpack,...

The 48-month Standardized Precipitation Index (SPI-48) is a meteorological drought indicator to monitor precipitation anomalies over 48-month accumulation periods and is a proxy indicator for long-term impacts, for example reduced reservoir and groundwater rec...

The 6-month Standardized Precipitation Index (SPI-6) is a meteorological drought indicator to monitor precipitation anomalies over 6-month accumulation periods and is a proxy indicator for medium-term impacts, for example reduced stream flow and reservoir stor...

The 9-month Standardized Precipitation Index (SPI-9) is a meteorological drought indicator to monitor precipitation anomalies over 9-month accumulation periods and is a proxy indicator for medium-term impacts, for example reduced stream flow and reservoir stor...

The indicator provides robust forecasts of the occurrence of on unusual dry or wet precipitation conditions over the next 3 months. It is computed based on the forecasted Standardized Precipitation Index (SPI-3), derived from the long-range (i.e. seasonal) for...

The indicator provides robust forecasts of the occurrence of on unusual dry or wet precipitation conditions over the next month. It is computed based on the forecasted Standardized Precipitation Index (SPI-1), derived from the long-range (i.e. seasonal) foreca...

The indicator provides robust forecasts of the occurrence of on unusual dry or wet precipitation conditions over the next 6 months. It is computed based on the forecasted Standardized Precipitation Index (SPI-6), derived from the long-range (i.e. seasonal) for...

The 1-month Standardized Precipitation Index (SPI-1) is a meteorological drought indicator to monitor precipitation anomalies over 1-month accumulation periods and is a proxy indicator for immediate impacts of droughts such as reduced soil moisture, snowpack, ...