Was Prince Charles really nearly killed in an avalanche as depicted in The Crown?

evoke.ie:

said at the time that the group had been stationary when the avalanche began.The run where the accident occurred was described as ‘a slope of awesome steepness, dropping about 500 meters (yards)’ in the 1988 Good Ski Guide but we’re not sure an avalanche adds to its ‘awesome’ factor.Princess Diana and a pregnant Sarah Ferguson were also on the trip but weren’t on the slopes at the time.It wasn’t the first time the group had skied there with Charles frequenting the slopes in his bachelor days and is hailed as helping Klosters get its elite status.It cut the royal’s trip short as they had only landed in Switzerland on Tuesday March 8 and Charles, Diana, Prince Andrew and Fergie had happily posed for photographs only the day before.So while.