Adverse weather operations

Question 1

Thunderstorms and Icing cause what hazards?

Answer 1

THUNDERSTORMS

1   Severe Turbulence
2  Microbursts and downbursts
3  Airframe Ice
4  Lighting
5  Hail

ICING

Requirements for Icing are visible moisture and a temperature at or below zero degrees.

RIME ICE are small super cooled droplets, which freeze
rapidly and are Opaque and brittle due to trapped air.
The temperature will be minus 10 to minus 20 degrees.

CLEAR ICE are larger super cooled droplets which are slower freezing, and forms in sheets which are difficult to remove. The temperature will be Zero to minus 15.

HOAR FROST results from vapour changing directly to ice. The cold airframe descends into warm, moist air, or the aircraft is left outside on a cold clear night.