For most of the year Tucson's "washes" hold not a drop of water. So this Coronado Ridge Wash is bone dry right now. But come July or so - when the monsoon season begins - this wash will be rushing with water.
I'm a transplanted New Yorker who loves the Tucson climate. On New Year's Day I have a bit of fun calling my (snowbound) east coast friends to announce that I'm drinking coffee while sitting on my patio. (: