For what it is worth, I was on a skibus from the Corvatschbahn heading towards Samedan at the time of the aircraft landing. I could see it was landing towards the NE and into a heavy snow shower. My own thoughts at the time were that the weather conditions were not very suitable to attempt a landing although I had no idea of what landing aids were available at the airport.
I was not aware that an accident had occurred until I read about it in the "Enagadiner Post" on saturday.
For information I am not a professional aviator, but I do hold an FAA PPL licence.