- AirAsia flight disappears during journey to Singapore
- Pilots requested diversion due to bad weather
- "Bad weather per se does not bring down aircraft," says CNN's Richard Quest
- Thunderstorms could have been too high for plane to fly over
(CNN)The passengers and crew aboard AirAsia Flight QZ8501 expected to land in Singapore at 8:30 a.m. on Sunday, after a flight of just over two hours.