 This most often results in a merging of the two low pressure systems into a single extratropical cyclone, or can less commonly result in a mere change of direction of either one or both of the cyclones.The precise results of such interactions depend on factors such as the size of the two cyclones, their strength, their distance from each other, and the prevailing atmospheric conditions around them.Extratropical cyclones can bring mild weather with a little rain and surface winds of , or they can be cold and dangerous with torrential rain and winds exceeding , (sometimes referred to as windstorms in Europe).