Thanks to a California cousin I learned something new today!
Isn't it gorgeous?
It's the rarest of all naturally occurring atmospheric phenomena.
This picture was captured on the Idaho/Washington border. The event lasted about one hour.
Clouds have to be cirrus, at least 20K feet in the air, with just the right amount of ice crystals and the sun has to hit the clouds at precisely 58 degrees.
I would love to see this.
note: I'm not sure what the '20K feet means