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::

Start Timestamp (UTC):
(YYYY/mm/dd HH24MI)
End Timestamp [inclusive] (UTC), interval must be less than 4 days
(YYYY/mm/dd HH24MI)
Which statistic to compute
Select state/sector
Plotting mode (user defined color-ramp or freezing)
Color Ramp:
  Reverse Colormap?
Image Pixel Size @100 DPI
Image Resolution (DPI) (50 to 500)
Select Output Format:

Plot Description:

NCEP's Real-Time Mesoscale Analysis (RTMA) provides a fine scale hourly or in the case of the RTMA Rapid-Update (RTMA-RU), 15 minute interval analysis of a number of atmospheric variables. The IEM archives a few grids for various purposes and this app allows the generation of a plot with either the max or min air temperature over some period of your choice.

Caution: The max/min values are based on hourly or 15 minute interval samples, so these will not fully capture the actual high nor low temperature. When the 15 minute data is available, it should certainly do a better job than the hourly.


Based on a sampling of recent timings for this application, plot generation time has averaged 29 seconds. Hold on for the plot is generating now!


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.