Originally Posted by
IO540
No apparent weather angle
The weather in and around Sion, especially in the valley, can change within minutes. It was a procedure of ours to go and eyeball up the valley pre departure because you couldn't rely on the actual weather report still being relevant.
I've actually got airborne in, essentially, CAVOK conditions, done a 180 back down the valley to be confronted with a huge banner cloud that wasn't there two minutes earlier.