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)

First Snowfall Threshold (T for trace)

Which Variable to Plot?

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

This chart displays either the first or last date of the winter season with a snowfall of a given intensity. The snowfall and snow depth data is not of great quality, so please be careful with this plot.

For a `Trace` snowfall event to count, the coincident low temperature needs to be below 40F. This is to help filter out hail events.

3 Generated Chart

Based on recent timings, plot generation averages 2 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.

21 Nov 2024: Season's First Trace
27 Oct 2023: Des Moines First Snowfall
07 Dec 2022: Cedar Rapids First Snowfall
19 Apr 2021: Last Measurable Snowfall
29 Oct 2019: First Trace of Snowfall
23 Apr 2019: Done with snowfall?
17 Oct 2018: First Snowfall of Season
13 Dec 2017: Waiting for first inch
11 Apr 2016: Last Trace
20 Nov 2015: First Measurable Snowfall
26 Oct 2015: First Inch Snowfall
03 Mar 2015: Last 1+ Inch of Snow