Hong Kong Observatory yesterday issued its first cold weather warning of the season with temperatures in parts of the city expected to fall as low as nine degrees Celsius today. Parts of the New Territories will see the lowest temperatures, while Hong Kong Island can expect a wintry 11 degrees, with similar lows tomorrow, the Observatory's acting assistant director Chan Sai-tick said. "The winter monsoon will reach the coast of Guangdong tonight, and temperatures are expected to drop suddenly overnight," Chan said yesterday. Chan today advised the public to keep warm and avoid prolonged exposure to wind and rain in the coming days. "People should wear warm clothes, make sure of good indoor ventilation and call or visit the elderly to make sure they know of the coming cold weather," he added. Temperatures are expected to rise slightly over the weekend but a prolonged chilly spell is expected as winter arrives in the city. However, Chan said that this year's monsoon would be "weaker than normal", and would bring milder winter weather than usual. In preparation for the cold snap, the Senior Citizen Home Safety Association plans to upgrade its mobile application, which will provide the elderly, their caregivers and family members with weather warnings and detailed weather information. The app, "e-See Find", will be upgraded in late December, with real-time weather information provided by the Observatory. Meanwhile, the Philippines was bracing itself for bad weather once again as Severe Typhoon Hagupit approached the country's east coast. The Observatory said on its website: "At 1pm Severe Typhoon Hagupit was over the western North Pacific, centred about 180km southeast of Yap. It is forecast to move west-northwest at about 28km/h in the general direction of the Philippines." It is estimated Hagupit will reach the Philippines on December 6.