The Catalina, AZ, 2023-24 Water Year

Check it out.  We’re still having generally greater totals than we had during those many droughty years of the late 1990s to about 2012 that caused so much speculation about longterm permanent drought here due to global warming (later rephrased to “climate change” after a hiatus in global warming that began around 1999 and lasted more than a decade).    The red line is a quadratic fit to the data.  Let’s hope those greater WY totals of late continue despite overall gradual warming over this whole period.

The Catalina WY record happened to begin in 1977-78 right at the beginning of one of the wettest few years in hundreds of years in the Southwest generally as seen in tree ring records.  The overall Arizona statewide average (unfortunately presented by calendar years by NOAA) doesn’t show much going on over the past 100 years, see lower graphic through 2022, the latest year available.

Author: Art Rangno

Retiree from a group specializing in airborne measurements of clouds and aerosols at the University of Washington (Cloud and Aerosol Research Group). The projects in which I participated were in many countries; from the Arctic to Brazil, from the Marshall Islands to South Africa.