What is the critical horizontal wind shear per 150 miles for turbulence classified as moderate or greater?

The correct answer is that the critical horizontal wind shear per 150 miles for turbulence classified as moderate or greater is greater than 18 knots. This threshold is established based on the relationship between wind shear and turbulence intensity. When the horizontal wind shear exceeds 18 knots over a distance of 150 miles, it can create significant turbulence that may impact flight safety and performance.

In aviation, understanding wind shear is essential, as it directly affects the aircraft's performance during different phases of flight, particularly during takeoff and landing. Pilots and dispatchers must be aware of these conditions to make informed decisions regarding flight paths and to ensure the safety of the operation.

Turbulence classifications are based on specific criteria, with moderate or greater turbulence indicating a more hazardous environment. This connection underscores why wind shear thresholds are crucial for effective flight planning and operational safety.