Sep 18, 2025
The combination of an upper-level low off the CA coast and the remnants of Tropical Cyclone Mario resulted in a significant moisture increase with PWATs increasing upwards of 1.8-2.0 across most of southwest AZ. The aforementioned features also provided strong upper-level forcing to result in widespread showers and thunderstorms during the afternoon hours. With MLCAPE values maxing out at 1500 J/kg along with the abundant moisture, the thunderstorms were efficient rain producers, resulting in i
Source: NOAA National Weather Service Storm Events Database (event 1294112). 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.