Historical Palmer Drought Indices


Monthly maps of drought conditions in the contiguous U.S. as measured by the Palmer Drought Severity Index, Palmer Hydrological Drought Index, Palmer Modified Drought Index, and Palmer Z-Index (Palmer, 1965) are provided for January 1900—September 2015. Animations of any set of monthly maps for any period desired can be viewed by selecting the beginning and ending dates of interest.

NCEI added Alaska climate divisions to its nClimDiv dataset on Friday, March 6, 2015, coincident with the release of the February 2015 monthly monitoring report. For more information on this data, please visit the Alaska Climate Divisions FAQ.

Palmer Drought Severity Index
October 2014 - September 2015

October 2014 Palmer Drought Severity Index

Data File: Palmer Drought Severity Index Divisional Data