Fujiwhara effect
As it approached the United States, the storm slowed and began curving northward, passing east of Cape Hatteras, North Carolina. It weakened into a tropical storm on October 13. For a time, the system's proximity to Tropical Storm Marco resulted in hints of the Fujiwhara effect, in which two tropical cyclone appear to rotate around each other. A high-pressure area over Newfoundland steered Lili northeastward, away from the United States, and the tropical storm once again sped up. It skirted the coast of Nova Scotia and transitioned into an extratropical cyclone on October 15, dissipating shortly after crossing southeastern Newfoundland.