April 27, 2011 Super Outbreak
A dedicated outbreak landing page for one of the most searched tornado history dates in the United States, connecting official records, DAT surveys, and related context.

Primary sources
- NOAA Storm Events Database: Official tornado record baseline used throughout Tornadic.
- NWS Damage Assessment Toolkit: Surveyed damage paths, points, polygons, and attachment metadata.
- NWS text damage surveys: Published NWS survey findings and revisions from Public Information Statements.
- NOAA Storm Prediction Center: Fast preliminary tornado reports and severe-weather context.
- Data rights and reuse: Upstream source terms and contributor permissions still apply.