I dreamt of a dozen or more toadoes hitting at one time. I don't know the exact location we were at. Family and friends were there. Some more than others. William my sons daycare teacher was even there.
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.
I I dreamed I was riding a horse with my sister on back same horse,a black stalion, with a rider that I could not see his face. I turned around the corner and I stopped to walk my horse,because my horse seemed very tired black dogs attacked me.
The fact that your horse got tired and then you were attacked seems like it might be a warning to you to take care of yourself and keep up your strength. Maybe you are overworked or under stress, and this is your subconscious' way of telling you to take it easy for a bit. You mentioned the color black a bit in your dream, does it have any special significance to you? I don't know what your sister's presence means in the dream. It depends on what you think of your sister and the type of relationship you have with her.