Weather Quiz

Local conditions, geological features, and other anomalies can change the wind direction and speed close to the Earth's surface, making it difficult to control and maneuver the sUAS.

Fog is more likely to form when the temperature and dew point converge. A difference between these two temperatures of 3 degrees C (or 5 degrees F) is indicative of possible fog formation.

Steam fog forms in the winter when cold, dry air passes from land areas over comparatively warm ocean waters. Low-level turbulence can occur and icing can become hazardous in a steam fog.

Conditions favorable for radiation fog are clear sky, little or no wind, and small temperature/dew point spread (high relative humidity). Radiation fog is restricted to land because water surfaces cool little from nighttime radiation.Answer (B) is incorrect because radiation fog will not form over water since water surfaces cool little from nighttime radiation. Answer (C) is incorrect because radiation fog will not form over water since water surfaces cool little from nighttime radiation.

Wind shear is a sudden, drastic change in wind speed and/or direction over a very small area. Wind shear can subject an aircraft to violent updrafts and downdrafts, as well as abrupt changes to the horizontal movement of the aircraft. While wind shear can occur at any altitude, low-level wind shear is especially hazardous due to the proximity of an aircraft to the ground.