Nov 20, 2019
Tropical moisture paired with a couple upper low systems led to the development of widespread rain and isolated thunderstorms across south-central Arizona over the course of the 19th through the 21st. Most areas across Maricopa, northern Pinal, and Gila counties measured 1-2 inches of rainfall with higher terrain spots north and east of Phoenix picking up 2-4 inches. The significant heavy rain, which lead to episodes of flash flooding in the Phoenix area, occurred on the 20th. Periods of trainin
Source: NOAA National Weather Service Storm Events Database (event 859723). 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.