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“Winds did reach gale force offshore and the southern part of Hong Kong Island ,” he told the Post. Lam said this was enough to require the No 8 signal to be raised.Ĭlarence Fong Chi-kong, founder of the independent Weather Underground, which often reviews the Observatory’s performance, also said raising the No 8 signal was justified. The No 8 signal, the third-highest in the Observatory’s warning system, is raised when winds intensify to between 63km/h and 117km/h.Īt around noon on Tuesday, average windspeed at Waglan Island to the southeast was 85km/h, while wind speeds at Cheung Chau beach hit 62km/h. The storm’s effects were compounded by a northeast monsoon, widening the reach of strong winds, a phenomenon that former Observatory director Lam Chiu-ying said was typical of typhoons at this time of year. Nangka spares Hong Kong but leaves dozens dead in Vietnam and Cambodia At its closest point, the storm was still more than 400km from Hong Kong. Tropical Storm Nangka was the farthest typhoon from the city to trigger a No 8 signal in 60 years.
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It would also examine how to improve efforts to better educate the public about weather phenomena.
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The Observatory later said it routinely compiled data and collected independent opinions on its forecasting for major weather events, which would be used to improve its predictions. “But since there was some difference, we will look at how to better tackle these situations in the future.” “Because the forecasts generated by our prediction tools matched our expert knowledge, we decided to issue the warning,” he said. The Observatory had originally expected heavy rains to hit the city, but local dry air might have caused the moisture to evaporate as it arrived, according to Chan. Hong Kong recorded its warmest year on record in 2021, logging 54 very hot days and 61 hot nights, with daily minimum temperatures reaching 28 degrees or above.The signal was raised at 5.40am and lowered to No 3 at 7.40pm. Last year, the city's weather forecaster reported a temperature of 36.1☌ during the hottest recorded day in May, breaking the previous record of 35.5☌ from 1963. "So cold weather in May is in fact a good sign." "Under global warming, cool weather in May will be rarer, while hot weather will be more common, which we are worried about," he said. He said such a low temperature in May was "rare", as it was about seven degrees lower than the average minimum temperature of 23.3☌, based on data recorded during the first five days of May over a period of 1991 to 2020. Leung added that seawater temperatures were lower than normal and had produced a "cold snap". "This time, the winter monsoon is stronger than the summer monsoon, along with the rain, so the weather is cooler," he said. Leung Wing-mo, a former assistant director at the Observatory, explained that Hong Kong was experiencing a transition from winter to summer, leading to different seasonal monsoons affecting the current temperature. The signal was issued for the first time in April when the Hong Kong Wetland Park, located in the city's northwest, recorded temperatures of 35.9☌ in the afternoon of the same day.īut a leading meteorologist said there was no conclusive evidence to indicate the recent weather fluctuations were the result of climate change. On Friday, the Observatory issued its earliest "very hot weather" warning since the system was introduced in 2000. The monsoon has also affected the rest of Guangdong's shoreline. The city's cool weather was the result of a northeast monsoon and showers, which were caused by an upper-air disturbance, the forecaster said. The Observatory reported a minimum temperature of 16.4☌ in Tsim Sha Tsui, the lowest figure for May since 1917, breaking the previous record from 2013 of 16.6☌. HONG KONG: Hong Kong recorded its coldest day in May for more than a century on Monday morning, according to the city's weather forecaster, with a veteran meteorologist saying it was a "good sign" amid climate change fears. Hong Kong recorded its coldest day in May for more than a century on Monday morning.