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Under the influence of a trough of low pressure, heavy rain and thunderstorms affected Hong Kong this morning (April 24). The Observatory issued the first Amber and Red Rainstorm Warning Signal of the year respectively at 10.15am and 10.40am. The area of heavy rain moved southwards and rain over the territory began to weaken at around noon. The Observatory issued the Amber Rainstorm Warning Signal to replace the Red Rainstorm Warning Signal at 12.30pm. All rainstorm warning signals were cancelled at 1.20pm.
From the morning till 2pm, more than 50 millimetres of rainfall were recorded generally over Hong Kong. The rainfall recorded over the Hong Kong Island, the northern part of the New Territories, Tuen Mun, Tai O and Sha Tin even exceeded 70 millimetres. Rain was heaviest around 10 a.m. to 11 a.m. Figure 1 shows the rainfall distribution over Hong Kong today (till 6pm).
The trough of low pressure over the south China coastal region will continue to advance southwards, crossing Hong Kong and bringing thunderstorms to the region tonight (April 24). It is expected to move over the northern part of the South China Sea tomorrow (April 25) when rain over the territory will weaken. For the latest weather forecast, please refer to the following webpages:
http://www.weather.gov.hk/wxinfo/currwx/flw.htm (Local Weather Forecast) and
http://www.weather.gov.hk/wxinfo/currwx/fnd.htm (7-day Weather Forecast)
Up to 6pm today, the effective time of the warning signals is summarised as follows:-
Thunderstorm Warning:
9.15am to 2.30pm, April 24, 2007
4pm and is still in force at 6pm, April 24, 2007
Amber Rainstorm Warning Signal:
10.15am to 10.40am, April 24, 2007
12.30pm to 1.20pm, April 24, 2007
Red Rainstorm Warning Signal:
10.40am to 12.30pm, April 24, 2007
Ends/Tuesday, April 24, 2007
Issued at HKT 19:11
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