Aug 27, 2022
High pressure situated south of the International Border led to a westerly flow aloft, which caused dry air advection. However, there was still sufficient moisture (PWAT around 1.5 inches) and instability (MLCAPE 1000-2000 J/KG) as well as a subtle disturbance in the upper-levels to result in the development of strong thunderstorms across portions of south-central and southwest Arizona. Downdraft CAPE values were also in excess of 1500 J/KG, which led to favorable conditions for some of these th
Source: NOAA National Weather Service Storm Events Database (event 1054307). 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.