Man, that's too bad...personally I don't think I could bring myself to anchor a boat in heavy weather. I am not an expert boater by any stretch but I did do a lot of ocean fishing growing up and I have built a sailboat of my own design...I can think of 21 footers that would be fine in that kind of weather but I would never personally anchor a boat in rough seas. That is not to say that I disagree with anyone who would with a very long line but I couldn't do it myself! Rather do one of two things: head into the waves, or run away from them if you can do it without burying the bow in the next wave.
But as I say I am not an expert. I would be pretty nervous heading that far off shore myself - even though I would rather be offshore than on the coast if the weather was bad, I would prefer to be close by and back on land before it gets ugly than survival sail on the water.