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

Plot for:

Select WFO:

Select UGC Zone:

Start Date:

(YYYY/mm/dd)

Number of Days in Plot

Label Event ID?

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

Gantt chart of watch, warning, and advisories (WaWa) issued by an NWS Forecast Office for a start date and number of days of your choice.

The width of the bar is the duration of the event and is a bit difficult to explain for some WaWa types. The color shaded area represents the maximum period at least one county/zone was included in the event. The hallow area represents the period between when the NWS created the event to when it first hit its issuance time. This is a quirk of how VTEC works with things like winter storm watches going "into effect" at some time in the future. When there is no hallow area, these are events that went into effect immediately at issuance. For example, Severe Thunderstorm Warnings are all this way.

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.

22 Jan 2024: Busy Two Weeks
13 Dec 2022: Week of Headlines
11 Feb 2021: Active Winter Weather
01 Dec 2019: Eventful Thanksgiving Week
27 Oct 2017: The Gamut of Products
27 Dec 2016: Active Four Days
17 Feb 2016: Active Two Weeks
09 Jan 2015: Busy Week
24 Jan 2014: January Headlines