Automated Data Plotter

This application dynamically generates many types of graphs derived from various IEM data sources. Feel free to use these generated graphics in whatever way you wish.

Reset App IEM Explorer (Simplified)

1 Select a Chart Type

Choose from available chart types:

2 Configure Chart Options

Evaluate change from this starting date:

(YYYY/mm/dd)

Evaluate change to this ending date:

(YYYY/mm/dd)

Compute SPI over how many trailing days

Select State:

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

This autoplot produces an infographic for a given state with some diagnostics on the weekly change in Standardized Precipitation Index (SPI) over a given day interval. The purpose is to show how a state's SPI values have changed over a seven day period. Changes in SPI drought classfication are colorized as green for improvements and red for degradations.

Caution, this chart does take a number of seconds to generate.

3 Generated Chart

Based on recent timings, plot generation averages 81 seconds. Please wait while your chart is being generated...

CSV Data Excel Download

If you notice plotting issues with the image above, please contact us and provide the URL address currently shown by your web browser.

IEM Daily Features using this plot

The IEM Daily Features found on this website often utilize plots found on this application. Here is a listing of features referencing this plot type.

28 Feb 2025: 60 Day SPI Update
12 Sep 2023: Change in 90 Day SPI
09 Jun 2023: Change in 60 Day SPI
08 Nov 2022: 90 Day SPI Changes
26 Oct 2022: 60 Day SPI Changes