Tropical Cyclone Errol

Western Australian Regional Office

Track of Tropical Cyclone Errol

A tropical low formed over the Timor Sea on 12 April then drifted to the south, towards the Kimberley coast. The low intensified overnight on 13 April, and by the morning of 14 April was a strong, albeit very small system which was assessed to be just below tropical cyclone intensity. The low intensified further the following night to be named Tropical Cyclone Errol at 8 am WST on 15 April when located approximately 150 km off the northern Kimberley coast. Given the proximity to the coast and some uncertainty in the short-term forecast movement, a Flash Warning was issued for Kimberley coastal and island communities between Kalumburu and Kuri Bay.

After remaining slow-moving for most of 15 April, TC Errol eventually began to track to the northwest, away from the West Australian coast. TC Errol increased to Category 2 intensity on 16 April and maintained that strength until it moved out of the Australian Tropical Cyclone Warning Area of Responsibility on 17 April. TC Errol was assessed by the Jakarta Tropical Cyclone Warning Centre to have weakened to a Category 1 cyclone as it approached the southern coast of West Timor, then below tropical cyclone intensity by 8 am WST 18 April.

Tropical Cyclone Advices were issued for the northern Kimberley coast between Kuri Bay to Kalumburu from 9:30am WST 15 April until 9am WST 16 April.

Errol generated heavy rainfall over the far northern Kimberley during 14 April, with 184 mm recorded at Faraway Bay in the 24 hours to 9 am WST on 15 April.

***All information relating to intensity and track is preliminary information based on operational estimates and subject to change following post analysis.***

Errol was the second tropical cyclone of 2010/11 season in the Northern Region and the seventh cyclone in the Western Region. In addition, Errol was the fifth cyclone off the northwest coast of Western Australia.

Extreme values during cyclone event (estimated)
Note that these values may be changed on the receipt of later information
Maximum Category:2
Maximum sustained wind speed:105 km/h
Maximum wind gust:145 km/h
Lowest central pressure:986 hPa