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 Date (inclusive):

(YYYY/mm/dd)

End Date (inclusive):

(YYYY/mm/dd)

Calendar Date Time Zone / Period:

How to summarize data:

Select WFO (when appropriate):

Select State (when appropriate):

Select FEMA Region:

Select UGC Zone/County:

Colorize calendar cells based on values?

VTEC Phenomena and Significance 1

VTEC Phenomena and Significance 2

VTEC Phenomena and Significance 3

VTEC Phenomena and Significance 4

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

This application presents a calendar of daily counts of the number of watch, warning, advisories issued by day. This accounting is based on the initial issuance date of a given VTEC phenomena and significance by event identifier. So a single Winter Storm Watch for 40 zones, would only count as 1 event for this chart. The concept of a calendar date needs some explanation. The calendar date is either US Central Time or the time zone of the local NWS Office or a 12 UTC to 12 UTC time period. For the 12 UTC case, the date represents the start of that 24 hour period.

You can also generate this plot considering "ALL" NWS Offices, when doing so the time zone used to compute the calendar dates is US Central.

3 Generated Chart

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

CSV Data Excel Download

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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.

08 May 2024: Another 100+ Tornado Warning Day
08 May 2023: Iowa SVR Warnings by Date
29 Sep 2021: Daily Warning Counts
25 Mar 2020: Tornado Warnings
13 Jun 2018: Week of Warnings
31 Jan 2018: Winter Headlines
18 Jun 2009: Severely Active
26 Mar 2009: Severe Weather picking up