If you have to fly through a warm front when freezing level is at 10000 feet in the warm air and at 2000 feet in the cold air, at which altitude is the probability of freezing rain the lowest?
Refer to figure.
FREEZING RAIN. The conditions needed for freezing rain are quite specific.
Generally, precipitation first falls from a cloud as snow. If it falls through warmer air before reaching the ground, it can melt and turn to rain droplets. If it then falls through cold air again before hitting the ground, the droplets can become supercooled (which means that they are still falling in liquid state, even though their temperature is below 0ºC).
- As said above, freezing rain consists of raindrops that have become supercooled after falling from warmer air into air where the temperature is below zero. In this case, the danger exists between 2000ft and 10000 ft =>Therefore, at 12000 feet, you are above both freezing levels and the probability of freezing rain is zero.
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