Tropical Cyclone Bulletin Here is the latest Tropical Cyclone Bulletin issued by the Hong Kong Observatory. The Standby Signal, No. 1 is in force. This means that a tropical cyclone now centred within about 800 kilometres of Hong Kong may affect us. At 10 p.m., Tropical Storm Lionrock was estimated to be about 200 kilometres north-northeast of Hong Kong (near 23.9 degrees north 115.0 degrees east) and is forecast to move west at about 18 kilometres per hour crossing inland Guangdong. Dispatched by Hong Kong Observatory at 21:45 HKT on 02.09.2010