This animation shows water levels on the upper Guadalupe River from midnight July 4, 2025, to 6 p.m. July 5 (local time). The flood killed 119 people in Kerr County, including 25 girls and two teenage counselors at Camp Mystic.
Data sources
- Raw stream gauge data from the USGS was downloaded and processed to be consistent 5-minute data; it was then normalized to the average July water level at each station to get "height above normal."
- The basemap was created using data from Natural Earth, the National Hydrography Dataset, and the U.S. Census Bureau's TIGER database
Tools:
- Python for data harvesting, processing, and basemap generation
- Svelte 5, D3, and custom JavaScript for visualization
Interactive version with contextual information: https://www.willkoeppen.com/datavis/guadalupe-floods/
Posted by willkoeppen