What's the latest on "forecast icing = known icing"

In article ,
Jose wrote:

Did the parachute figure into your decision making at all?
I never seriously considered deploying it if that's what you mean.

No, I meant did the presence of that additional out make it easier for
you to decide to continue on rather than turn back (did it influence
your decision to do so)?

Well, introspection only goes so far, but no, I don't think so. I think
the main factor was that the front had just moved in. An hour before it
had been clear blue skies. I was going over the central valley, so
there were no significant mountain ranges to lift the air. So I was
pretty sure that I would not be in the clouds for long (and I was right).

Also, the forecast freezing level was 6000-8000, so I figured if I did
pick up ice it would not start until I reached cruise altitude. As it
happened, I started icing up almost immediately upon entering the
clouds, at about 3500 feet. That freaked me out a little. (Actually, a
whole bunch of other stuff was also going wrong at the same time. But
that's another story.)

rg