Isn't there a difference between known icing, forecast probable icing,
and
forecast possible icing--in addition to the severity of said conditions?

Peter

Not to me. I won't fly anywhere near any of those.

Ron Lee

I should have been a bit more thorough in my post.

The question as asked was regulatory; but I had neglected to ask whether the
icing conditions became known as a result of the Cirrus pilot's pirep. A
search revealed that the icing conditions were predicted by the NWS,
although transmitted in a manner other than expected, and previously known
to ATC. All in all, I was left with more questions than answers and much
food for thought.

Peter