The Short-Term Multi-Indicator Drought Index (MIDI) is an experimental blended product. It looks at current drought conditions across the U.S. by integrating several key short-term drought indices into one objective, computer-generated map. MIDI data were from Climate Engine were available in raster format.
This product is based on methodology from the NOAA National Weather Service’s Climate Prediction Center. The short-term and long-term MIDIs are created using the Climate Engine tool, and apply Climate Prediction Center weighting ratios to the high-resolution gridMET gridded research dataset. The data are updated every 5 days, with a delay of 4 to 5 days to allow for data collection and quality control.
The short-term MIDI combines the Palmer Drought Severity Index (PDSI), Palmer Z-Index, 1-month Standardized Precipitation Index (SPI), and 3-month SPI to approximate drought impacts from changes in precipitation and moisture over a short-term timeframe. This product is an example of current NIDIS-funded research. Learn more.