Jun 30, 2009
High pressure aloft remained near the Four Corners region, resulting in a continued east to northeast flow aloft over southeast Arizona. Plentiful moisture again led to scattered afternoon and evening thunderstorms. With boundary layer moisture still somewhat drier, thunderstorms were again able to produce strong to severe downburst or microburst winds.
Source: NOAA National Weather Service Storm Events Database (event 170910). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Pima County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.