With regard to the earlier turbulence forecast, the X symbols indicate where severe turbulence has been reported by commercial airliners (the last two from an Airbus 320 and a Boeing 737).
If you are planning to fly through the red circle,
- Stay in your seat unless absolutely necessary.
- In your seat, keep your seat belt on and pulled tight.
- Do not eat a big meal immediately before boarding.
- If you have airsickness medicine, take it before you board.