Jul 14, 2004
A weakening upper level disturbance over Northern Chihuahua, Mexico moved into Southeast Arizona where plenty of moisture was already in place due to tropical storm Blas. Precipitable water was almost double the normal level for mid-July thanks to these features. An upper air sounding from late morning showed an increase in the east wind shear causing the initial storms to train. This led to the flooding of areas in Santa Cruz county.
Source: NOAA National Weather Service Storm Events Database (event 5415768). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Santa Cruz County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.