Oct 8, 2014
Simon, once rated a Category 4 hurricane with maximum sustained winds of 135 mph, was the fourth tropical system of 2014 to bring rainfall to southeastern Arizona. An upper level disturbance located over the southwestern United States helped to advect copious amounts of moisture into the area ahead of Simon, which eventually produced heavy rainfall and flooding on October 8 and 9. Numerous roads on the Tohono O'Odham Nation were closed for more than 24 hours due to flooding.
Source: NOAA National Weather Service Storm Events Database (event 544803). 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.