Monitoring Drought

The Standardized Precipitation Index

November 2001 SPI Maps

click on images for full-size maps
Interpretation of 1-month SPI
Interpretation of 3-month SPI
Interpretation of 6-month SPI
Interpretation of 9-month SPI
Interpretation of 12-month SPI
Year-to-date SPI

 

 

 

© 2005 National Drought Mitigation Center

 
Quick Link to Other Drought-related Sites Quick Link for Media Drought for Kids Publications Drought Photo Gallery Drought Network News Search the Site Site Map What's New Quick Link to NDMC's Drought Impact Reporter Link to US Drought Monitor Back to the NDMC Home Page Contact Information About the NDMC Mitigating Drought Understanding Your Risk Planning for Drought What is Drought?