It's called the Fujiwara Effect. The Fujiwara Effect is the tendency for two nearby tropical cyclones to rotate around each other, so what you actually have happening is you have got one storm that would be the dominant storm, and they would rotate around each other, and it happened in the Pacific in the year 2001, and it happened in 1995 in the Atlantic, with Hurricanes Iris, Omberto and Karen all interacting at one point or another with each other. It's possible the two storms in the WestPAC will get some kind of Fujiwara effect in the next few days, if the JTWC is correct in their predictions.