Turbulence can be caused by a number of things, differential in surface temperatures causing a rising of air, the Jetstream, Weather Fronts, Thunderstorms or even other planes! What you need to understand is, turbulence is a very normal phenomenon, and it would be more uncommon for you to not have any turbulence, as opposed to experiencing some.
To Understand The Turbulence, see the reports on the left, click on the Turbulence Report and it will tell you the classification (Light, Moderate or Severe), and it will also tell you the altitude and type of plane that reported this turbulence.
Mountains, larger bodies of water, coast lines, warmer climates and flying in proximity to the Jetstream.
FlyHome, the leading source in Fear of Flying Relief Courses, says that there is a very common misunderstanding when it comes to turbulence. Clients feel as if the plane is "Dropping" hundreds, or even thousands of feet. BUT THATS NOT SO...