Wind shear
Cyclone Vincent formed on 7 February 2001, 900 km northwest of Onslow, Western Australia from an active monsoonal trough. Wind shear prevented the tropical low from intensifying for a few days, but once the storm formed it began to move southeast and intensify. Due to wind shear, Vincent peaked with sustained winds of 85 km/h (50 mph), and did not reach Category 2 intensity. Cyclone Vincent crossed the Western Australia coast as a tropical low, a few kilometres south of Broome, Western Australia.