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

Which variable to plot:

Threshold Direction:

Select State:

Plot Display Options:

Start Day (inclusive):

(mm/dd)

End Day (inclusive):

(mm/dd)

Threshold Value:

Limit search to years after (inclusive):

Limit search to years before (inclusive):

Color Ramp:

Reverse Colormap?

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

This autoplot generates a map of the frequency of having at least one day at-or-above or below a given threshold between an inclusive period of days.

If you set the start date to a date greater than the end date, the effect is to search the period including 1 January.

3 Generated Chart

Based on recent timings, plot generation averages 4 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.

17 Jul 2025: Mid-July Highs below 75
10 Apr 2024: Frequency of below 20