Turbulence isn’t entirely predictable, according to pilot Stuart Walker. Flights can be impacted by four different types of turbulence: clear-air turbulence, thermal turbulence, mechanical turbulence and wake turbulence. But how does turbulence happen in clear skies? Walker, who has decades of experience flying planes, explains each type of turbulence and what pilots can do to help avoid a bumpy ride for passengers in flight. 0:00 Types of turbulence 0:39 Clear-air turbulence 2:08 Thermal turbulence 3:41 Mechanical turbulence 5:11 Wake turbulence 6:22 Tips for fliers Booked Your trip may be booked, but there are hundreds of people and processes that help you travel to where you need to go. From airport logistics to cruise ship procedures, WSJ’s Booked peels back the curtain on the travel industry, guiding viewers behind-the-scenes through the lens of industry experts. #Turbulence #Flying #WSJ