A short thread of real-world examples of the Fujiwhara effect (tropical cyclones can interact when their centers move within ~900 miles of each other, meaning they affect each other's movement and may even merge).

1) Wilma vs Alpha in 2005 -- Wilma absorbs the weaker Alpha

2) Hilary vs Irwin in the eastern North Pacific in 2017 -- the two storms swirl around each other until Hilary falls apart (3-hour resolution imagery)

Also see the excellent explainer by @pppapin: https://twitter.com/pppapin/status/889949617315557377

3) Iris vs Karen in 1995 -- as they dance, Iris jogs eastward and Karen accelerates northward around Iris.

Oh, Luis and Humberto are in here too. 1995 was ridiculous until 2005 came along. (It was also the season that got me into hurricanes.)