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::

Which plot type to produce?
Plot for a WFO or a State?
Select WFO (when appropriate):
Select State (when appropriate):
End Date Limit to Plot:
Single or Combination of Products:
Select Watch/Warning Phenomena Type:
Select Watch/Warning Significance Level:
Inclusive Start Year (if data is available) for plot:
Inclusive End Year (if data is available) for plot:
Start date of the 'year' plotted
Image Pixel Size @100 DPI
Image Resolution (DPI) (max 500)
Select Output Format:

Plot Description:

This plot displays an accumulated total of office issued watch, warning, advisories. These totals are not official and based on IEM processing of NWS text warning data. The totals are for individual warnings and not some combination of counties + warnings. The archive begin date varies depending on which phenomena you are interested in.

Generally, the archive starts in Fall 2005 for most types. Event counts do exist for Severe Thunderstorm, Tornado and Flash Flood warnings for dates back to 1986. Data quality prior to 2001 is not the greatest though.

If you want to use the "cold season" as the basis of a year, pick the "July 1" option below. The "year" label is then associated with the fall portion of the cold season (1 Jul 2021 - 30 Jun 2022 is 2021).

Updated 26 Jan 2023 When selecting to limit to a year to date period, a more exact algorithm is now used to accumulate warnings through the end of the current date in central timezone.

Based on a sampling of recent timings for this application, plot generation time has averaged 4 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.