I have used forereaching in bad weather before. Basically, when forereaching, you are actually steering
the boat actively. As you go up a wave you steer into the wind just enough to keep the boat going forward. Then when you crest a wave, you steer off the wind to control your speed down the back side of the wave. The trick is to get the feel of the boat and not pick up too much speed or lose too much speed going up or down the waves. The trick is also not to accidently tack as the boat gets thrown around in big waves sometimes in a sloppy sea.
The book Storm Tactics by Lin and Larry Pardey
descibes reaching on page 34. They say that if you are hove to and you are forereaching the boat is sailing forward out of the protective slick created by being hove to and that is a bad thing.
Hal Roth in his book describes fore reaching as the practice of taking down the jib
entirely and proceeding solely with the mainsail
basically pinching and tacking back and forth. "Handling Storms"
Adlard Coles describes fore reaching under bare poles during a storm in his book.
Except for me, I would say all are experts, but all define fore reaching differently. I think minaret above agrees with Lin and Larry Pardey
, but many other people have used my definition too.