What type of advisory must be communicated to the flight crew in case of wind shear?

The communication of a low-level wind shear advisory to the flight crew is crucial for ensuring safety during takeoff and landing phases. Wind shear refers to sudden changes in wind speed and direction over a short distance, which can cause significant challenges for an aircraft during critical flight stages. By conveying this specific advisory, air traffic control provides the flight crew with timely information that allows them to anticipate and prepare for potential turbulence or performance issues associated with wind shear.

Another important aspect is that low-level wind shear can dramatically impact an aircraft's approach and landing profile, potentially leading to loss of control or an inability to maintain the desired altitude. Delivering accurate and immediate low-level wind shear advisories enables pilots to implement necessary precautions, such as adjusting approach speeds or changing their landing technique.

The other types of advisories listed, such as severe weather advisories or runway closure advisories, do not specifically address the immediate and critical effects of wind shear on flight operations. Understanding and responding to wind shear is a specific skill and knowledge area for pilots, which is why the focused advisory is essential.