Wind Shear

Question 1

What is the wind speed change threshold for significant non-convective wind shear within 500 feet AGL?

Answer 1

Exceeds 25 KT

AGL stands for Above Ground Level

Question 2

What is the wind speed change threshold for significant non-convective wind shear within 1000 feet AGL?

Answer 2

Exceeds 40 KT

Question 3

What is the wind speed change threshold for significant non-convective wind shear within 1500 feet AGL?

Answer 3

Changing by 50 KT

Question 4

What pilot report indicates significant non-convective wind shear within 1500 feet AGL?

Answer 4

Loss or gain of IAS of 20 KT or more

Question 5

What is Clear Air Turbulence (CAT) frequently associated with?

Answer 5

A jet stream aloft

CAT occurs in clear air and is not associated with thunderstorms.

Question 6

Where is jet stream turbulence greatest?

Answer 6

Below and to the left of the jet core when facing downstream

This positioning is crucial for pilots to understand to avoid turbulence.

Question 7

What can lead to areas of Clear Air Turbulence besides jet streams?

Answer 7

A sharp temperature gradient, mountain waves, or wind profiles that vary significantly

These factors can create instability in the atmosphere.

Question 8

True or False: Clear Air Turbulence is typically found in cloudy conditions.

Answer 8

False

CAT is specifically named for its occurrence in clear air.

Question 9

Fill in the blank: Jet stream turbulence is greatest below and to the ______ of the jet core when facing downstream.

Answer 9

left

Understanding the jet core’s position is essential for navigation.