Columbia University International Research Institute for Climate and Society (IRI), NOAA/National Weather Service/National Centers for Environmental Prediction/Climate Prediction Center (CPC), University of Maine
The International Research Institute (IRI) has worked in collaboration with the NOAA Climate Prediction Center (CPC) and the University of Maine to develop a tool that provides probabilistic forecasts of future Standardized Precipitation Index (SPI) as an indicator of drought for various accumulation periods for the globe. In addition to the SPI forecast tool, analyses of observed precipitation conditions using monthly SPI are provided, based upon monthly totals from the CPC's Gauge - OLR Blended (GOB) daily gridded precipitation analysis.
Global Drought Analysis Tool: This map shows values of the monthly Standardized Precipitation Index (SPI) for a user-selected accumulation period (3, 6, 9, or 12-month) for the globe, based upon observed monthly precipitation totals from the Climate Prediction Center's (CPC) Gauge - OLR Blended (GOB) daily precipitation analysis (combined retrospective and real-time, accumulated to monthly).
Global Drought Prediction Tool – NMME Multi-Model Ensemble SPI Forecast: This tool displays maps of probabilistic forecasts of the Standardized Precipitation Index (SPI, for 3, 6, 9, or 12-month accumulation periods) for the globe based on monthly precipitation predictions from 6 NMME models and the initial observed condition.