clare wrote, on Thu, 18 Dec 2014 12:40:06 -0500:

Not a snowballs chance in -- southern California.

In a funny way, that's not actually true.

Remember, the Salinian Block is actually a huge piece of rock
which has moved about 300 or so miles, from around Los Angeles,
up along the coast, toward northern California (and it's still on
its journey to the Aleutians), at a rate of about two
inches per year along the San Andreas Fault.

So, it can happen. But it will be a few hundred million years
when/if it does...