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.

Reset App IEM Explorer (Simplified)

1 Select a Chart Type

Choose from available chart types:

2 Configure 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.

3 Generated Chart

Based on recent timings, plot generation averages 30 seconds. Please wait while your chart is being generated...

If you notice plotting issues with the image above, please contact us and provide 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.

25 Feb 2025: Thursday to Sunday
12 Aug 2024: Chilly August Weekend
23 Apr 2024: Past Weekend Minimum
24 Apr 2023: Chilly April Weekend