Rain, maybe snow, to fall in Catalina after the 20th

This from a NOAA spaghetti plot interpretation by the author Arthur.  Take a look:

Valid the 17th of Jan at 5 PM AST. No rain, no way! Look at the bulging lines N of AZ, humped northward, indicating the presence of a storm-blocking ridge!
Valid the 17th of Jan at 5 PM AST. No rain, no way! Look at the bulging lines N of CA and AZ, humped northward, indicating the presence of a storm-blocking ridge!

But, like most house of cards, by the 21st that ridge is long gone.  So sometime around the 20th or so, of course, a little fuzzy at this point), look for a drastic change in the weather as troughs and storms develop.  And, I will opine that we’ll see some snow this time around.  See below:

Valid 21 Jan, at 5 PM AST.
Valid 21 Jan, at 5 PM AST.

That’s my excitement for today for you.  Will check back on this in a few days, who knows, with more exacting information.

The End

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.