Dec 24, 2021
A moderate to strong atmospheric river aligned over South-central Arizona and led to widespread light to moderate rain across the region. Rain began falling the night of the 23rd and lasted through the evening of the 24th. The Phoenix area measured 1-2 inches and most foothill and mountainous areas measured 2-3 inches, with a few localized spots measuring 3-4 inches. The high rainfall amounts led to minor urban flooding and elevated flows in typically dry washes as well as in several major creek
Source: NOAA National Weather Service Storm Events Database (event 992786). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Maricopa County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.