Fujiwhara effect
A tropical wave exited western Africa on August 13, which moved across the Atlantic over the next nine days before entering the eastern Pacific. After associated convection became better organized, the system developed into Tropical Depression Twelve-E on August 30 about southwest of the Baja California peninsula. With light wind shear and warm waters, the depression quickly strengthened into Tropical Storm Kristy as thunderstorms increased. The small hurricane tracked slowly northwestward at first due to a ridge to its north. An eye soon developed, signaling that Kristy intensified into a hurricane early on August 31, about 30 hours after forming. Later that day, the hurricane attained peak winds of . Soon after, wind shear increased due to the outflow of powerful Hurricane John to its east, and Kristy moved into an area of cooler waters and drier air. Hurricane forecast models anticipated a Fujiwhara effect, or an orbiting of two tropical cyclones, which would eventually result in Kristy being absorbed by Hurricane John.