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::

Geographical extent to plot:
Which metric to plot:
Start Date / Time (UTC, inclusive):
(YYYY/mm/dd HH24MI)
End Date / Time (UTC):
(YYYY/mm/dd HH24MI)
Local Storm Report Type Filter
Aggregate Option:
Color Ramp:
  Reverse Colormap?
Label values on map?
Image Pixel Size @100 DPI
Image Resolution (DPI) (50 to 500)
Select Output Format:

Plot Description:

This application generates a map displaying the number of LSRs issued between a period of your choice. These are the preliminary reports and not official totals of events.

For plots that compare against an "average" value, the period of record is used (since 2002).

NOTE: If you choose a period longer than one year, only the "count" metric is available. Sorry.

Caution while plotting by county: The raw NWS LSR product text only contains a free-text name and state. The IEM attempts to use some heuristics to associate those with an actual political boundary. This fails about one percent of the time.


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.