Monitoring Drought

The Standardized Precipitation Index

2009 Archive SPI Maps

click on map for a suite of SPI maps
December
November
October
not available
September
August
July
June
May
April
March
February
January

Note: SPI maps are based on preliminary precipitation data and caution is necessary when analyzing. For a detailed look at the data source and methods used in incorporating the data into a final product, click here.

 

© 2006 National Drought Mitigation Center

 

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