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 Station:

Select Month:

Select Year:

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

This chart summarizes Flight Category by hour and day of a given month. In the case of multiple observations for a given hour, the worst category is plotted.

code	Label	Description
Unknown	Unknown	No report or missing visibility for that hour
VFR	Visual Flight Rules	Ceiling > 3000' AGL and visibility > 5 statutes miles (green)
MVFR	Marginal Visual Flight Rules	1000-3000' ceilings and/or 3-5 statute miles, inclusive (blue)
IFR	Instrument Fight Rules	500 - < 1000' ceilings and/or 1 to < 3 statute miles (red)
LIFR	Low Instrument Flight Rules	< 500' AGL ceilings and/or < 1 mile (magenta)

3 Generated Chart

Based on recent timings, plot generation averages 2 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.

01 Jul 2024: June Flight Rules
22 Mar 2022: March Flight Rules
19 May 2020: Recent Cloudiness
17 Sep 2018: September Flight Rules
22 Nov 2017: November Flight Categories
15 Nov 2016: Nearly All VFR