Oct 11, 2000
Deep upper level trough over Nevada on the 10th moved over southeast Arizona through the 12th. The system was able to tap into moisture from the remnants of Tropical Storm Olivia which resulted in large amounts of rain and flooding. Early morning on the 11th, deep convection (with -65 to -70C cloud tops) developed. Isolated thunderstorms exploded across southeast Arizona. The low level center of Olivia passed through Cochise county between 09Z and 12Z on the 12th which ended the heavy rain.
Source: NOAA National Weather Service Storm Events Database (event 5158250). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Pima County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.