Lesson 305 Icing

Question 1

What are the five factors involved in the formation, type and intensity of icing? Briefly describe.
TMNLS

Answer 1

Temperature: icing requires sub-zero temperatures
Moisture: the greater the liquid content the greater the probability and intensity of icing.
Nuclei: the greater the amount of ice nuclei the lower the threat of icing.
Lift: stronger the lift, bigger the droplet size.
Stability of the air: upward motion will form and support more abundant and larger water droplets.

Question 2

Strong lift is found in:

USO

Answer 2

Unstable clouds (ACC, TCU, CB)
Strong synoptic features such as intense deep lows and sharp troughs.
Orographic clouds