"If there is a chance of significant icing along the route, either change the route or have an escape plan ready to go at a moment’s notice. Sometimes the only right answer is to cancel the flight. I once agonized over a forecast for widespread icing conditions between me and my desired destination before giving up and getting in the car. That decision was justified when we got to eastern Colorado that evening and saw the trees covered in ice from freezing fog.
In-flight icing is one of the many risks pilots must manage in flying. Having a good
understanding of the phenomenon helps to devise effective strategies for dealing with it."