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 Station (STC000? are climate district, ST0000 state avg)

Precipitation Threshold (inch)

Include "trace" reports in the analysis?

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

This plot presents three precipitation metrics for a site of your choice. The upper plot displays the maximum period of days in between precip events of either greater than 0.01" (labelled no rain) and then of a threshold of your choice. The bottom plot provides the maximum 24 hour period precip as reported by the once daily observatons

3 Generated Chart

Based on recent timings, plot generation averages 2 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.

01 Jul 2025: Cedar Rapids below half inch
12 May 2023: Spencer Precip Streaks
16 Jul 2021: Streak below an inch
23 Dec 2019: Max Dry Stretch
19 Dec 2017: Period between Two Tenths
20 Oct 2015: 20 straight dry days
07 Oct 2010: Streaks without precipitation