Question

Upon your preflight evaluation of weather, the forecasts you reference state there is an unstable air mass approaching your location. Which would not be a concern for your impending operation?

1) Thunderstorms
2) Stratiform clouds
3) Turbulent conditions

Answer 1

When faced with an unstable air mass, thunderstorms and turbulent conditions are a concern, while stratiform clouds, which indicate more stable conditions, are not a significant concern for aviation.

Step-by-step explanation:

When performing a preflight evaluation with an unstable air mass approaching, certain weather patterns become a concern. Thunderstorms and turbulent conditions are associated with unstable air masses and could be a significant concern for aviation. However, stratiform clouds are typically not associated with unstable air situations but with more stable air where there's a gradual lifting of the air layer. Stratiform clouds are generally widespread and do not indicate severe weather like thunderstorms or turbulence, thus they would not be a concern in terms of the safety and operation for your impending flight.