It’s that time of year again in the Northern Hemisphere, when in-flight icing can be a threat. Depending on where you are and where you’re going, icing may be a rare possibility during the upcoming season. It also can be a sure thing. Evaluating the possibility of in-flight icing is part of the equation—its potential impact is another.
For example, if we’re flying a Boeing 737, a 50-percent probability of icing at 13,000 feet is a good thing to know but of little consequence. For one, the airplane is certified for flight in known icing (FIKI). For another, it likely won’t be at 13,000 feet for very long.
