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

Geographical extent to plot:

Which metric to plot:

Start Date / Time (UTC, inclusive):

(YYYY/mm/dd HH24MI)

End Date / Time (UTC):

(YYYY/mm/dd HH24MI)

Local Storm Report Type Filter

Aggregate Option:

Color Ramp:

Reverse Colormap?

Label values on map?

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

This application generates a map displaying the number of LSRs issued between a period of your choice. These are the preliminary reports and not official totals of events.

For plots that compare against an "average" value, the period of record is used (since 2002).

NOTE: If you choose a period longer than one year, only the "count" metric is available. Sorry.

Caution while plotting by county: The raw NWS LSR product text only contains a free-text name and state. The IEM attempts to use some heuristics to associate those with an actual political boundary. This fails about one percent of the time.

3 Generated Chart

CSV Data Excel Download

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.

02 Dec 2024: Snow Local Storm Reports
05 Sep 2022: 2022 LSR Counts
27 Nov 2020: 2020 Severe Hail Reports
07 Nov 2018: 2018 Tornado Local Storm Reports
28 Feb 2017: NWS Local Storm Reports