Automated Data Plotter

This application dynamically generates many types of graphs. These graphs are derived from processing of various data sources done by the IEM. Please feel free to use these generated graphics in whatever way you wish. Reset App. The IEM Explorer application offers a simplified frontend to some of these autoplots.

First, select a chart type::

Second, select specific chart options::

Select Date + Tornado Track to plot:
Color Ramp:
  Reverse Colormap?
Image Pixel Size @100 DPI
Image Resolution (DPI) (50 to 500)
Select Output Format:

Plot Description:

This autoplot combines NWS Damage Assessment Toolkit (DAT) tornado tracks (lines) with Tornado Warning (polygons) to provide along track estimates of lead time. This is all unofficial, of course, and makes assumptions about constant travel speed of the tornado along the track. The lead time is evaluated at 1 minute intervals and follows a method found in: Stumpf 2024: A Geospatial Verification Method for Severe Convective Weather Warnings: Implications for Current and Future Warning Methods. Points receiving a warning after observation are assigned a negative lead time. Points receiving no warning are assigned a no lead time and not considered in the lead time average.

The data download option will provide the discritized points along the tornado track with the lead time in minutes.

Based on a sampling of recent timings for this application, plot generation time has averaged 5 seconds. Hold on for the plot is generating now!

View Data (as csv)   Download as Excel  
If you notice plotting issues with the image above, please do let us know by providing 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.