Fujiwhara Effect is a most common phenomenon with tropical cyclones such as typhoons or hurricanes, but it also occurs in other cases.
It is interesting to note that the two storms actually move about a central point between them, as if both were tied to the same post and each swung around separately from the other. But it appears as if they have locked arms and they are in square dancing.
Dr. Sakuhei Fujiwhara, the chief of the Central Meteorological Bureau in Tokyo, wrote a paper in 1921 describing the motions of «vortices» in water. So this phenomenon is named after him.
The National Hurricane Center has said that Tropical Storms Philippe and Rina were about 575 miles apart from each other as of Friday morning. But, they continue to spin in the open Atlantic Ocean, and «some degree of interaction is likely» between them due to their proximity to each other.
USA Today has reported that meteorologist Jeff Masters has written about this in his Yale Climate Connections blog. In a post written on social media platform X, Miami-based meteorologist John Morales, said that the two storms are «expected to pivot around each other, with one becoming more dominant. Now, neither is expected to hit the Caribbean.»
The National Hurricane Center has made a forecast for Tropical Storm Philippe. It said that the storm «has only moved roughly 40 miles over the past 24 hours, and it has been generally drifting to the southwest during that time. It also said it will interact with Tropical Storm Rina several hundred miles to its east. They are expected to continue to interact through the weekend, Philippe may crawl