This is the Marine Drive back in 1979, taken just a bit further round than the above pic - I was clerk-of-the-course on the Cambrian Rally and had to cancel the event on the Saturday morning as the Orme was blocked, and routes through the forests were impassable. This was taken later that morning.
Date of the event ... 17th March, so almost the same week as things are happening now. I don't remember it ever being closed since for snow, until now.
It snowed for the 1980 Cambrian Rally as well, but only in the forests, and that was on 15th March!