Fog/Mist

Question 1

What are the types of fog?

Answer 1

Radiation, Advection, Upslope, Steam.

Question 2

Radiation fog

Answer 2

Over land on calm, clear, cool nights. When radiation cooling reduces air temperature to or below its dew point.

Question 3

Advection fog

Answer 3

When moist air moves over a cooler surface, winds are necessary. Usually in coastal areas.

Question 4

Upslope fog

Answer 4

Moist stable air at or below its dew point, as it moves up terrain. Needs winds 5-15 mph is favorable.

Question 5

Steam fog

Answer 5

When cold air moves over warm water.

Question 6

What is frost n how does it effect the aircraft’s performance?

Answer 6

The air must drop at or near the dew point. Dew then accumulates on the aircraft and if the temperature is below freezing it produces frost. Dew poses no threat, but frost is a safety hazard because it disrupts flow of air over the surface effecting the ability for takeoff and creates drag.