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 application presents a calendar of Storm Prediction Center or Weather Prediction Center outlooks by state, WFO, or county. The GIS spatial operation done is a simple touches. So an individual outlook that just barely scrapes the selected area would count for this presentation. Suggestions would be welcome as to how this could be improved.This app attempts to not double-count outlook days. A SPC/WPC Outlook technically crosses two calendar days ending at 12 UTC (~7 AM). This application considers the midnight to ~7 AM period to be for the previous day, which is technically not accurate but the logic that most people expect to see.
When plotting hail, tornado, or wind probabilities, a "H" will appear on days that had "hatched"/"SIGNificant" risk. Note that this isn't an exact science as the hatched and probability risk are not checked to see if they spatially/temporally overlap each other.
Updated 6 June 2025: The CSV/Excel output was updated to include a `None` value for days without an outlook spatially coincident. Additionally, the `date` column is now formatted as `YYYY-MM-DD`.
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.
- 14 Jan 2025: S California Fire Wx
- 31 Mar 2023: Out Like a Roaring Lion
- 21 Jun 2022: Streak of Slight Risk
- 06 Apr 2022: Fire Weather Outlooks
- 16 Mar 2022: SPC Outlooks this Winter
- 27 Oct 2021: Excessive Rainfall Outlooks
- 18 Mar 2020: First Day 2 Slight of 2020
- 17 Apr 2019: Second Slight Risk for Iowa