International Workshop on Asian Monsoon Year AMY08

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International Workshop on Asian Monsoon Year
(AMY08)
Extreme Weather Event A Case Report Of
2006/2007 Severe Floods In Johore, Malaysia LING
LEONG KWOK MALAYSIAN METEOROLOGICAL DEPARTMENT
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Extreme Weather Events

• Extreme rainfall event is getting more frequent
  in Malaysia
• 11 to 14 January 2007
• Heavy Rainfall Caused Floods In Johore and South
  of Pahang
• 7 to 13 January 2007
• Heavy Rainfall Caused Floods In Pitas, Kota
  Marudu, Beaufort and Sandakan, Sabah
• 6 to 8 January 2007
• Heavy Rainfall Caused Floods In Kelantan and
  Terengganu
• 28 to 31 December 2006
• Heavy Rainfall Caused Floods At Kota Marudu,
  Sabah
• 17 to 20 December 2006
• Heavy Rainfall Caused Floods In Johore, Pahang,
  Negeri Sembilan and Malacca
• 6 December 2006
• Severe Thunderstorms and Heavy Rainfall In Ipoh,
  Perak

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Malaysia Map
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Extreme Weather Events

• 10 May 2006
• Strong Winds and Heavy Rainfall In Kuala Lumpur
  and Selangor
• 18 April 2006
• Flash Floods and Heavy Rainfall In Johore Baru,
  Johore
• 6 April 2006
• Flash Floods and Heavy Rainfall At Old Klang
  Road, Kuala Lumpur
• 14 to 17 December 2005
• Heavy Rainfall Caused Floods In Perlis, Kedah,
  Kelantan and Terengganu
• 8 to 12 December 2004
• Heavy Rainfall Caused Floods In Kelantan,
  Terengganu and Pahang

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Number of Flood Evacuees50,000
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Extreme Event 17/12/2006 20/12/2006
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24-hour Accumulated Station Rainfall Distribution
(mm)
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3
5
4
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Extreme Event 11/01/2007 14/01/2007
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24-hour Accumulated Station Rainfall Distribution
(mm)
2
3
5
4
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Southeast Asia Monsoon System Changed

• Due to natural variability
• Other likely factors
• El Nino Southern Oscillation
• Indian Ocean Dipole
• Madden-Julian Oscillation
• Global Warming
• Understanding is incomplete for weather
  forecaster operational application
• Further investigation is needed

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500hPa Geopotential Height and Mean Sea Level
Pressure
Cold Air Burst between 16/12/2006 and 17/12/2007
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850hPa Wind
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Radar Echoes 16/12/2006 20/12/2006
171206 00UTC
161206 12UTC
171206 12UTC
181206 00UTC
181206 06UTC
181206 12UTC
191206 12UTC
191206 00UTC

211206 00UTC
201206 12UTC
201206 06UTC
201206 00UTC
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MTSAT Imagery 17/12/2006 20/12/2006
171206 0030UTC
171206 1230UTC
181206 0030UTC
191206 1230UTC
191206 0030UTC
181206 1230UTC
211206 0030UTC
201206 1230UTC
201206 0030UTC
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MMD Radar Coverage
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MMD Upper Sonde Stations
SULU SEA
SOUTH CHINA SEA
PENINSULAR MALAYSIA
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Thank You