sentences:  On 6 January the JTWC issued its final warning on Tropical Cyclone Helen, and then later that day TCWC Darwin followed suit and issued its final advisory on Tropical Low Ex-Helen as it approached TCWC Brisbane's Area of Responsibility.The strongest wind gust recorded was at Charles Point Lighthouse with 120 kilometres an hour recorded during the Tropical Cyclone with Darwin Airport recording 102 kilometres an hour around 2 am ACST making it the first time since April 1985 for Darwin to experience Category 1 or more since Cyclone Gretel passed Darwin on 12 April 1985.Damages from the storm amounted to an estimated A$21.5 million (US$15 million).