Nov 19, 2025
Between the evening of November 17th and the evening of the 20th, a slow-moving upper-level low pressure system progressed through the Desert Southwest. The combination of the strong dynamical forcing from the low and well-above normal moisture values (PWATs of 0.80+) led to multiple rounds of scattered to widespread moderate to heavy rainfall and isolated thunderstorms. Most of the rain and impacts fell/occurred on the 18th and 19th, with much of central Arizona receiving rainfall totals of 1.0
Source: NOAA National Weather Service Storm Events Database (event 1299047). 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.