Flash Flood — Mason, Texas

2025-07-04 · near Grit, Mason, Texas

Event narrative

Law enforcement reported that the split at State Highway 29 and US Highway 377 was flooded, west-northwest of the city of Mason. Time was estimated by radar.

Wider weather episode

Devastating and historic flash flooding occurred in northern and northeast portions of the Northwest Hill Country on July 4th with damage to many roads and houses. The combination of abundant tropical moisture associated with the remnants of Tropical Storm Barry and a weak upper level storm system, led to very slow moving or stationary thunderstorms producing very heavy and efficient rainfall. The heaviest rainfall amounts were 10 to 16 inches with localized rainfall totals of near 25 inches in northwest portions of Mason County.

View location on OpenStreetMap → (30.7857, -99.3257)

Source: NOAA Storm Events Database, event_id 1283032. Narrative written by the NWS forecast office that issued the report.