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:

First Fall Temp Below Threshold (First Freeze/Frost) (#27)

2 Configure Chart Options

Select Station (STC000? are climate district, ST0000 state avg)

[IATAME] Ames Area [1893-01-01 till now]

Temperature Threshold 1:

Temperature Threshold 2:

Image Pixel Size @100 DPI

Image Resolution (DPI) (50 to 500)

Select Output Format:

Plot Description:

This chart presents the date of the first fall (date after 1 July) temperature below threshold 1 and then the number of days after that date until threshold 2 was reached. The slanted dashed lines are used to translate the dots to the date of occurrence for the second threshold.

3 Generated Chart

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.

06 Jul 2023: First Sub 50
04 Aug 2021: First 50 to First Sub 32
06 Sep 2019: Cedar Rapids Sub 50 then Sub 40
27 Jul 2018: Sub 50 then Sub 40
30 Sep 2016: Sub 50 then Sub 32
09 Nov 2015: Just a few later in the year
13 Oct 2014: Days till killing frost