That may be the case sometimes, but there are no solid rules; each individual is different. Assuming they are tornadoes, they could represent any kind of emotional turmoil or anger about any situation, not necessarily to do with personal relationships though many dreams are about that. It could be that you're feeling angst about a situation in your life that is beyond your control? The dream is more likely than not showing you that there's nothing you can do about it so, like a tornado, you just have to sit tight and let it blow over... If they are torpedoes then it's a whole different matter.