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

Select Year (1893-)

1 Day Precipitation Threshold [inch]

Over Period of Trailing Days

Trailing Day Precipitation Threshold [inch]

For State

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

This is a complex plot to describe! For each 24 hour period (roughly ending 7 AM), the IEM computes a gridded precipitation estimate. This chart displays the daily coverage of a specified intensity for that day. The chart also compares this coverage against the portion of the state that was below a second given threshold over X number of days. This provides some insight into if the precipitation fell over locations that needed it.

3 Generated Chart

Based on recent timings, plot generation averages 5 seconds. Please wait while your chart is being generated...

CSV Data Excel Download

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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.

05 Jun 2025: Another Look at Precip Effectiveness
18 Sep 2023: Biggest Rainfall in February
26 Oct 2021: Widespread Half Inch Plus
27 Mar 2020: Widespread Rain events of 2019
07 May 2018: First Widespread Half Inch
10 Jun 2016: 2016 Precip Ineffectiveness
28 Jul 2015: Precip Effectiveness