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:
Which Variable
Threshold Direction:
Threshold (F or % or MPH):
Date Limiter
Inclusive Start Day of Year (when Date Limiter is custom): (mm/dd)
Inclusive End Day of Year (when Date Limiter is custom): (mm/dd)
Year to Highlight
Image Pixel Size @100 DPI
Image Resolution (DPI) (max 500)
Select Output Format:

Plot Description:

Based on available hourly observation reports by METAR stations, this application presents the frequency of number of hours for a given month or season at a given threshold.

If you pick a custom day of the year period that crosses 1 January, the year of the start date is used within the plot.

Updated 18 Sep 2018:Plotting tool was updated to consider dates prior to 1973 and to shade years that have more than 20% missing data. The hourly averages are based on years with sufficient data coverage.

Based on a sampling of recent timings for this application, plot generation time has averaged 6 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.