Squall, struck by a:
If struck by a sudden squall, let go your main throat halyards first—not the peak. By keeping the peak up you will be able to luff the boat; letting go the throat will relieve her until you can get in the wind and get your sail down and muzzled. If you cannot get your sail down, get her off before the wind and haul your mainsail flat amidship; then steer so as to bring the wind dead aft. This will split the force and give you a chance to take in sail.