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.

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1 Select a Chart Type

Monthly Frequency of Present Weather Code in METAR Report (#170)

2 Configure Chart Options

[DSM] Des Moines [1928-01-01 till now]
 

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.

3 Generated Chart

Generated chart
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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.