NOAA's National Centers for Environmental Information
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—July 2025. Animations of any set of monthly maps for any period desired can be viewed by selecting the beginning and ending dates of interest.
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This survey is designed to measure your level of satisfaction with the NCEI website. It consists of nine questions and should take approximately two to five minutes to complete. Please do not use this survey to provide comments on or responses to rules, notices, solicitations or other official agency actions. Any information you provide will be used to for the sole purpose of improving NOAA's digital products and services.