Trendless summer rains, and a look at what June has to offer

OK, cooling off now after yesterday’s rant (which somehow I just now notice has the wrong published date!), emotions now pretty much drained….
After noting that our cool season rains have oscillated into a drier spell from a very wet one over the past 35 years, it seemed like looking at what has happened to our summer rains would be appropriate today.  So, on to the next chapter of Catalina climo, a look at our summer rain season, and a look specifically at June. 
Have to harden myself, and you, too, for the tough 2 week transitional season that begins right now,  one that occurs between the end of rain chances here from cold troughs in the westerlies, and those rain chances associated with onset of the summer rains, sometimes called our “monsoon” season.  As you will see below, its not until June 20th that the chances of summer showers really shows up at all.
Thus, the next two weeks are the driest, and often the warmest of the year.  Almost no chance of rain (see second graph).  Steel yourself, my friends.

What kind of a trend do we have in our 35 year summer rain records for Catalina?  None, which is great.

This graph is reprised from an earlier climate issues (rant?)  blog.  It includes last year’s June through September rains.

Let’s look at June.  Not much explanation required, so will quit here.

Here’s where the original “dusty coolsnap”, so well timed by the models some two weeks ago, ended up yesterday, mostly off to the north of us. Take a look at these 24 h temperature differences for yesterday afternoon, courtesy of The Weather Channel. Stunning!

The End.


By 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.