This story has been made freely available as a public service to our readers. Please consider supporting SCMP’s journalism by subscribing . Hong Kong has raised the first typhoon warning signal of the year. The Observatory issued the standby signal No 1 at 4.15pm on Friday, saying a tropical cyclone was likely to affect the city. Forecasters cautioned the public to be prepared for changes in the weather while planning outdoor activities, and said the No 1 signal would remain in force on Friday night. The tropical depression is expected to make landfall at Hainan Island on Saturday, and at 5pm on Friday it was over the South China Sea and estimated to be about 500km south-southwest of the city. It was forecast to move west-northwest at about 15km/h (9mph) towards the vicinity of Hainan. Strong winds should be expected over offshore waters and on high ground overnight, with occasional squally showers and swells.