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Visualize Standardized Precipitation Index (SPI) since 1961 in a monthly step (results since 2015 are provisional).

  1. Select indicator, accumulation period, and month.
  2. Click on a location on the map to display a regional time series graph of the chosen indicator
  3. By clicking on a point on the time series graph you can move the map to a different month.
  4. To focus the graph on certain period, draw a box around the dates you want to focus on in the sub-graph.

An extension of SPI is Standardized Precipitation Evapotranspiration Index (SPEI), available in a separate application

Visit the UK Droughts home page to read more about the data used in this application.

Application by Centre for Ecology and Hydrology.

GeoSearch and backdrop layers use public sector information licensed under the Open Government Licence v3.0.