Hong Kong Observatory issues black rainstorm warning

This story has been made freely available as a public service to our readers. Please consider supporting SCMP’s journalism by subscribing. The Hong Kong Observatory issued a black rainstorm warning on Monday evening, the first of the year, with a trough of low pressure expected to bring heavy rainfall in the coming 24 hours. The upgrade to the top-tier warning came 45 minutes after the forecaster issued the red signal at 7.50pm. The forecaster first issued an amber warning –