The observatory on Monday said it might issue the Standby Signal No.1 between tomorrow afternoon and tomorrow night, with Tropical Cyclone Yagi intensifying into a severe tropical storm. It said Yagi would be within 800 kilometres of Hong Kong tomorrow and then edge close to the coast of southern China. It added there was a high chance Yagi would move towards the vicinity of the western part of Guangdong and Hainan Island and would further intensify. Looking ahead, the observatory forecast Yagi could strengthen to a typhoon by Thursday.
