Rare Fujiwhara Effect taking place with two storms in Pacific


NEW BERN, Craven County - Hurricane Hilary and Tropical Storm Irwin could do a little dance out in the Pacific Ocean.

When tropical cyclones get within a certain distance from each other, usually 870 miles to 1,200 miles, they will rotate around each other counter-clockwise. When a stronger tropical cyclone approaches a weaker tropical cyclone, the stronger storm will often absorb the weaker storm. But when both tropical cyclones are roughly the same size, they both act to influence the path of each other. This is what meteorologists call the Fujiwhara Effect. It was named after the Japanese Meteorologist Sakuhei Fujiwhara who discovered the effect. The two storms are still heading away from the U.S.

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