Hi again,

in a night raid report is said "High icing index above freezing level at 10.000 ft."

So I understand that the possibility of icing problems would be quite high during ops. But what is actually meant by "index". Is it just a word for a high possibilty of icing or does it refer to some real index, percentage or something.

Sorry for that question, but I am really not familiar with this wording.