The Hong Kong Observatory on Monday said it will raise the No. 1 typhoon warning signal at 12:20 pm after Tropical Cyclone Fung-wong came within 800 kilometers of the city.

Fung-wong has weakened to a severe typhoon and will be closest to Hong Kong from Tuesday night to Wednesday morning, skirting at about 400 kilometers or more to the east of the territory, the observatory said.

“Depending on the change in intensity of Fung-wong, its distance from Hong Kong and local wind conditions, the observatory will assess the need for issuing the Strong Wind Signal, No 3,” it added.

At 10 am, Fung-wong was centered about 460 kilometers southeast of Dongsha, packing maximum sustained winds of 140 kph.

The observatory said the typhoon was forecast to move northwards towards the vicinity of Taiwan region, moving away from the city and weakening gradually under the influence of the northeast monsoon.

Under the combined effect of Fung-wong and the northeast monsoon, it will be windy and slightly cooler with swells over the coast of Guangdong in the next couple of days.

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The observatory said temperatures in urban areas will fall to around 20 degrees Celsius midweek this week, while the minimum temperature in Ta Kwu Ling in the New Territories could drop to 18 C on Thursday and Friday.

The observatory added that minor flooding may occur over some low-lying coastal areas on Monday night and early Tuesday morning, urging members of the public to pay attention to the latest weather updates.