Runway direction change?
A couple of weeks ago I was in the VA lounge in Sydney with about 45 min before my flight. It was 10am ish. As usual I started watching the runways for the taxiing, take offs & landings - loved it when I was 3 - still love it at 53.
I saw the Emirates A380 taxi from the IT then waited to see it take off to the south. A couple more planes took off to the south but while watching I could see a few planes taxiing south. Then a plane landed from the south and these other planes took off to the north.
How easy is it to change the runway direction like this? I take it ATC makes it's decision based on weather, wind strength, direction etc.
Would it stuff up you flight plan if you thought you would take off south but then have to change to north? Or is it planned ahead of time based on weather forecasts etc?