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.
1 Select a Chart Type
2 Configure Chart Options
Plot Description:
This chart presents year to date accumulated precipitation for a station of your choice. The year with the highest and lowest accumulation is shown along with the envelop of observations and long term average. You can optionally plot up to three additional years of your choice.You can specify the start date (ignore the year) for when to start the 365 day accumulation of precipitation. The year shown is the year for the start of the accumulation period. For example, if you accumulate after 1 October, the year 2020 would represent the period from 1 Oct 2020 to 30 Sep 2021.
Accumulating snowfall data is frought with peril, but this app will let you do it! The app has a tight requirement of no less than 3 days of missing data for the year to be considered in the plot.
3 Generated Chart
Based on recent timings, plot generation averages 6 seconds. Please wait while your chart is being generated...

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 Apr 2025: 2025 YTD Precipitation
- 13 Nov 2024: Above Average Again
- 19 Mar 2024: Accumulated Snowfall
- 22 Nov 2023: Ottumwa 2023 Precip
- 29 Aug 2023: Woeful Total for Cedar Rapids
- 10 Aug 2022: Sioux City Struggles
- 31 Mar 2022: Water Year, Halfway Point
- 14 Feb 2022: Just One Big Event
- 29 Oct 2021: Fast Water Year Start
- 01 Feb 2021: Accumulating Snowfall
- 06 Jul 2020: Carroll Precipitation
- 03 Oct 2019: Water Year Accumulation
- 31 Jul 2019: 2019 Sioux Falls Precipitation
- 18 Sep 2018: Wilmington, NC Record Rainfall
- 12 Sep 2018: Almost Back to Average
- 17 Nov 2017: Fayette Year to Date Precipitation
- 06 Jul 2017: Sioux City YTD Precipitation
- 21 Dec 2016: Record Precipitation for New Hampton
- 06 Sep 2013: Accumulated Precipitation
- 16 Jun 2011: Above, but behind