Last week, a giant wall of dust rolled across the Arizona Valley:
The wall of dust, which stretched from Apache Junction to Avondale, preceded a storm that dropped a quarter-inch of much needed rain in Tucson. The rainfall was a record for the date.
The temperature there dropped 25 degrees in 90 minutes, from the day's high of 101 to the day's low of 76.
Don't miss the video: Link