Aug 18, 2022
Favorable monsoonal conditions promoted the development of severe thunderstorms across the region on the 18th. Abundant moisture (PWATs of 1.7-2.0) and instability (MUCAPE 1,000-2,000 J/kg) was in place across south-central and southwest Arizona, while increased easterly steering flow from an upper level low over northern Mexico aided in thunderstorms propagating off the high terrain. DCAPE were around 1,000-1,200 J/kg which helped in allowing strong to severe thunderstorms to produce damaging w
Source: NOAA National Weather Service Storm Events Database (event 1054040). 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.