Multi-Scale Standardized Precipitation Index Time Series Plots for Arizona and New Mexico

** Visit the Standardized Drought Index Viz Tool to generate custom plots!**

(Click here for all US States!)

The Standardized Precipitation Index (SPI) is a useful tool for monitoring drought at multiple timescales. Short-term drought conditions can impact agricultural activities while long-term drought can impact water resources. Given these different timescales, varying intensities of drought and even lack of drought can exist at the same time. The plots below are created by calculating the SPI value at all timescales between one and sixty months for each month using National Climatic Data Center climate division precipitation data. They are updated on the 12th of the month to incorporate the previous month's data (see NOAA NCEI release schedule). Click here for more information on how to interpret the plots. More SPI data plots can be found a the Western Regional Climate Center.
AZ Climate Division NM Climate Division

Arizona Plots

New Mexico Plots


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Plots for other states...
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Please contact Mike Crimmins with comments/questions

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Last Updated: 1/5/22 2022 The Arizona Board of Regents. All contents copyrighted. All rights reserved.