Nov 29, 2019
A powerful Pacific low pressure system moving slowly through the desert southwest interacted with deep moisture to produce widespread heavy rain across the central deserts during the morning hours on November 29th. Aided by frontal lift, isolated thunderstorms developed which further enhanced rain totals. The heavy rain resulted in several instances of flash flooding across the western portions of Maricopa County that occurred near or before sunrise. Most of the flash flooding took the form of f
Source: NOAA National Weather Service Storm Events Database (event 860223). 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.