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Free Malaysia Today
One month’s rainfall in one day, a once in a century event
Bernama -December 19, 2021 8:14 PM
The floods that hit the Klang Valley since yesterday following heavy downpours have caused thousands of residents to be evacuated.
KUALA LUMPUR: The heavy downpours that lasted over 24 hours from late Friday were a once-in-a-century weather event, bringing rainfall equal to the average for a month, environment and water ministry secretary-general Zaini Ujang said.
The phenomenon occurred due to monsoon flow factors and a low pressure weather system that achieved the level of a tropical depression that formed in the South China Sea on Dec 12.
The system entered Pahang on Dec 16 and moved across the west coast of Peninsular Malaysia, causing a rise in humidity and continuous heavy rain in almost every state in the peninsula.
“It is an exception. Normally, during the monsoon season, only states in the East Coast would receive heavy rain but this time, the entire peninsula, especially the central east coast and northern regions are receiving continuous heavy rain,” he said in a media conference here today.
He cited the high amount of rainfall recorded, with Sentul station being the highest at 363mm, Gombak 247mm, Jinjang 258mm and Sungai Bonus Jalan Tun Razak 273mm.
“The annual rainfall in Kuala Lumpur is 2,400mm. Yesterday’s rainfall has exceeded the average rainfall for a month, it is something beyond expectations and only occurs once every 100 years,” he said.
originally posted by: AndyMayhew
Whilst that's a lot of rain, one month's fall in 24 hours isn't that unusual. The most I've experienced here in England was nearly 3 months worth in 24 hours (July 2007).
However, the caveat is, we normally only get 40-50mm a month. That said, the 2007 rainfall did produce the worst floods on record.
originally posted by: musicismagic
a reply to: worldstarcountry
Hong Kong may get hit with a typhoon soon. Says its a big one. Its raining now in Hong Kong so well see what happens.