Additional details.
The anchor used was the stock Danforth anchor which Hunter supplied. I am not sure of the weight. It has been adequate in the past and I have experienced other storms at anchor.
Problem was that south winds were predicted and this anchorage has pretty good protection for winds in that direction. With that in mind, I tucked in within 100 yards of shore in less than 10 feet of water. My rode consisted of 80 feet of rope and 8 feet of chain. I thought anchor was pretty well set. The wind shifted much in the early evening, but not especially strong. Just before storm, wind was from the south, not strong, but boat reflecting the wind direction. Storm hit very fast with NORTH winds. There was no building of winds. Within seconds of initial winds change, it was GALE force winds - and hitting me sideways. Bimini straps broke first, and before I could get bimini tied down, roller furling line broke, opening sail and I was moving fast - great south wind anchorage means lee shore from unprotected north wind. It was incredibly fast - within minutes (5 max, maybe as little as 2) from gentle south wind to on the shore rip rap from north winds. 6 other boats at anchorage, 2 collided - one also found shore. Due to injuries, they called 911. Rescue personal found me first and insisted I get off boat - I'm not sure what I could have done at that point, but I was reduced to spectator and it was not a pretty sight.