Tracking Weather Extremes: July 2025 Texas Precipitation and Guadalupe River Flooding

This visualization uses NASA's GEOS-FP 2km replay data to analyze extreme precipitation patterns across Texas from June 30 through July 5, 2025, revealing the meteorological conditions behind one of the most catastrophic flash flooding events in Texas Hill Country history.

The statewide precipitation analysis shows how intense rainfall concentrated in Kerr county, with Hunt City experiencing an extraordinary weather event on July 4th when 6.5 inches (170 mm) of rain fell in just three hours. This extreme precipitation rate triggered catastrophic flooding along the Guadalupe River, which surged 26 feet in 45 minutes at Hunt before reaching a record-breaking crest of 37.52 feet - the highest level ever recorded at this location.

The visualization displays precipitation accumulations across the entire state while marking Hunt city to illustrate where these extreme rainfall totals converged with the geography of the Guadalupe River system, creating conditions for rapid-onset flooding that devastated downstream communities throughout the Texas Hill Country.