Flash Flood — Yuma, Arizona

2025-09-04 · near Laguna, Yuma, Arizona

Event narrative

Imperial Dam Road between the Walker and Howard Gates at the Yuma Proving Ground Naval Base was closed for several days due to major road erosion from flash flooding. Flood timing estimated from radar. No injuries reported.

Wider weather episode

An upper-level trough moving through the area providing strong upper-level ascent combined with MLCAPE values between 1500-3000 J/kg and PWAT values between 1.8-2.0 (associated with the remnants of Tropical Cyclone Lorena) resulted in numerous showers and thunderstorms across much of western AZ and southern CA. A cluster of strong to severe thunderstorms developed during the late afternoon hours over Yuma County and slowly moved westward, reaching the Lower Colorado River Valley before dissipating. With this cluster of storms, damaging winds, flash flooding and areas of dense blowing dust were observed with the City of Yuma area seeing the most impacts.

View location on OpenStreetMap → (32.8587, -114.4455)

Source: NOAA Storm Events Database, event_id 1292973. Narrative written by the NWS forecast office that issued the report.