The low-pressure system that has kept the monsoon moisture east of most of Arizona will erode, bringing a ridge of high pressure over Colorado for the return of deep monsoon moisture to the Southwestern United States by mid-month so read on for details on how it will affect the prone monsoon zones of Southern California … Join the Facebook Page … Continue reading Strong Monsoon Moisture Flow to Return to Southern California July 15th, Deepening Week of July 17th