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 Station:
Year to Highlight:
Present Weather Option:
How to aggregate the data:
Image Pixel Size @100 DPI
Image Resolution (DPI) (max 500)
Select Output Format:

Plot Description:

This chart totals the number of distinct calendar days or hours per month that a given present weather condition is reported within the METAR data feed. The calendar day is computed for the local time zone of the reporting station.

The reporting of present weather codes within METARs has changed over the years and there is some non-standard nomenclature used by some sites. The thunder (TS) reports are delineated into three categories here to hopefully allow more accurate statistics.

  • All Thunder Reports (TS) includes any TS mention in any present weather code
  • Thunder in Vicinity (VCTS) includes any VCTS mention in any present weather code, for example, VCTSRA would match.
  • Thunder Reports (excluding VCTS) includes most TS mentions, but not any including VC

This autoplot considers both routine and special hourly reports.

Based on a sampling of recent timings for this application, plot generation time has averaged 12 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.