What is considered the most hazardous condition when soaring in the vicinity of thunderstorms?

• A. Icing
• B. Wind shear and turbulence
• C. Thermal inversion
• D. Low visibility

Answer: (B)

Wind shear and turbulence. Thunderstorms produce rapid changes in wind speed and direction through gust fronts, downdrafts, updrafts, and complex rotor zones. These abrupt energy changes can throw a glider off its intended flight path, cause sudden loss or gain of airspeed, and push the aeroplane into unpredictable motion that’s hard to recover from. The resulting turbulence and shear can exceed the glide performance and handling limits, creating a real risk of loss of control or structural stress in a soaring aircraft.

Icing is not the primary concern in this scenario because, near a thunderstorm, you’d typically be avoiding the cloud and supercooled droplets; thermal inversion isn’t the immediate hazard when a storm is present since the storm’s dynamic activity dominates; and while low visibility is dangerous, the most dangerous factor is the wind shear and turbulence produced by the storm.