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:
Month Limiter
Inclusive Range of Years to Include (optional)
Threshold Direction:
Which variable
Temperature (F) / Pressure (mb) / Vis (mi) Threshold:
Secondary Temperature (F) / Pressure (mb) / Vis (mi) Threshold (for range queries)
Image Pixel Size @100 DPI
Image Resolution (DPI) (max 500)
Select Output Format:

Plot Description:

Based on hourly or better METAR reports, this plot displays the longest periods above or below a given temperature threshold. There are plenty of caveats to this plot, including missing data periods and data during the 1960s that only has reports every three hours. This plot also stops any computed streak when it encounters a data gap greater than three hours.

You can additionally set a secondary threshold which then makes this autoplot compute streaks within a range of values.

Updated 16 Jan 2024: The option to control the minimum number of hours was removed. This option did not add much value as folks generally wish to see the top 10 longest streaks.

Based on a sampling of recent timings for this application, plot generation time has averaged 13 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.