Precipitation Cumulative Departure From Average

By now, we should all be aware of our 20-year drought (I have many posts on this). While I have seen many graphical representations of it, this one in Kyle’s presentation was new to me. The blue bars show actual monthly precipitation over the past 20 years as measured at Wickiup Dam (not average as stated in the chart). The red line shows the cumulative departure from average. Over the past 20 years, Wickiup has seen almost 60 less inches than “average”. Kyle goes on to say in the presentation the cause is normal weather cycles, not global warming. Regardless of the reason, it has been dry over the past 20 years and we have had no changes in water policy or management in response.