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

Select SPC/WPC Outlook Day and Type

Select SPC/WPC Outlook Category

Select plot extent type:

Select WFO: (when applicable)

Select FEMA Region:

Select state/sector to plot

Outlook Issuance/Valid Timestamp (UTC Timezone):

(YYYY/mm/dd HH24MI)

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

This app generates infographics for the Storm Prediction Center or Weather Prediction Center outlooks. The trick here is how the valid time works. The app will first attempt to match an issuance to that timestamp, if it fails, it then looks backwards in time for the most recent issuance to that timestamp.

Another bit of ambiguity is which outlook you get between about midnight and the 13z issuance of the Day 1 Outlook. In this case and as the code stands now, you get the next day's outlook.

A GIS Shapefile download option exists for downloading these outlooks in-bulk.

3 Generated Chart

Based on recent timings, plot generation averages 3 seconds. Please wait while your chart is being generated...

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 Apr 2025: Four Days of Moderate Risks
04 Apr 2023: Here we go again
09 Aug 2021: SPC Day 2 Wind Outlook
28 Jul 2021: Moderate Risk over Wisconsin
02 Mar 2012: Large Moderate Risk
09 Aug 2006: 5% Tornado Threat
24 May 2004: Extremely Dangerous Situation.