Heavy thundery showers are expected in Hong Kong on Friday and will continue until Monday, according to the city’s weather forecaster, which issued an amber rainstorm warning in the morning. The warning was issued by the Observatory at 10.20am on Friday, meaning that more than 30mm of rain has fallen in an hour or is likely to fall generally over the city. “Showers and thunderstorms associated with a broad trough of low pressure are affecting the coast of Guangdong and the northern part of the...