Historical Palmer Drought Indices

Maps

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—November 2018. Animations of any set of monthly maps for any period desired can be viewed by selecting the beginning and ending dates of interest.



Palmer Hydrological Drought Index
May 2013

Dwell
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May 2013 Palmer Hydrological Drought Index

Data File: Palmer Hydrological Drought Index Divisional Data