Tornados or storms in dreams can represent impending threats coming in the dreamer's life. Whether the clouds or swirling winds are light- or dark-colored can indicate the source and the strength of the forces on the horizon. Storms can represent a positive cleansing or a restructuring necessary if they are white or light-colored...or an attempt to destroy, if the dream seems dark and ominous.
Sudden Tornado dream:
I dreamed there was s sudden wind. I looked out a window and saw a small white tornado heading toward us. I told my husband, and without hesitation, we headed for the basement (not our real house)--we called our dogs to follow us. We had just barely gotten down into the stairway and the tornado passed through, then it was gone. We went back up to assess the damage. Some things and bricks were out of place and there was some dirt and debris but nothing major I don't think. My husband had in his hands a very high-tech, boxy looking far-reaching satellite type of phone. It had just appeared and he was calling for help. I was so surprised at how quickly everything happened.
Interpretation:
Your dream is revealing an imminent shakeup or trouble that threatens your home or marriage, but you are able to see it coming and are able to lie low and emerge from the situation relatively unscathed--the perceived threat is worse than the actual damage done. Some cleanup and followup may be necessary, but you have direct access to supernatural resources and support.