Sep 4, 2025
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 dissipati
Source: NOAA National Weather Service Storm Events Database (event 1292973). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Yuma County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.