1. 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

2. 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

3. Malaysia Map

4. 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

5. Number of Flood Evacuees 50,000+

6. 17 Dec18 Dec19 Dec20 Dec December 2006 December Average December Maximum 1) KUANTAN (1951) 80.084.279.2189.2658.2620.0 (2001) 1471.1 2) MUADZAM SHAH (1984) 35.8173.8211.6125.0717.0405.5 (1991) 849.2 3) MERSING (1951) 1.87.4133.66.0562.2608.0 (1982) 1557.1 4) SENAI (1974) 94.6128.0236.040.0907.2243.2 (1991) 563.7 5) KLUANG (1974) 53.2126.8266.018.0775.8245.3 (1991) 642.1 24-hour Accumulated Station Rainfall Distribution (mm) Extreme Event: 17/12/2006 – 20/12/2006 1 2 3 4 5

7. 11 Jan12 Jan13 Jan14 Jan January 2007 January Average January Maximum 1) KUANTAN (1951) 15.218.818.654.0414.4310.2 (1971) 934.7 2) MUADZAM SHAH (1984) 67.058.069.036.0561.2279.4 (1984) 643.9 3) MERSING (1951) 64.0134.0237.0167.0880.4337.4 (1971) 834.1 4) SENAI (1974) 264.0213.09.019.0664.8208.0 (2001) 478.2 5) KLUANG (1974) 171.0222.042.016.0563.6169.7 (1987) 495.6 24-hour Accumulated Station Rainfall Distribution (mm) Extreme Event: 11/01/2007 – 14/01/2007 1 2 3 4 5

8. 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

9. 500hPa Geopotential Height and Mean Sea Level Pressure Cold Air Burst between 16/12/2006 and 17/12/2007

10. 850hPa Wind

11. Radar Echoes: 16/12/2006 – 20/12/2006 211206 00UTC 201206 12UTC201206 06UTC201206 00UTC 181206 06UTC 161206 12UTC 171206 00UTC 171206 12UTC181206 00UTC 181206 12UTC191206 12UTC191206 00UTC

12. 211206 0030UTC 201206 1230UTC201206 0030UTC 191206 1230UTC191206 0030UTC181206 1230UTC 171206 0030UTC171206 1230UTC181206 0030UTC MTSAT Imagery: 17/12/2006 – 20/12/2006

13. MMD Radar Coverage

14. MMD Upper Sonde Stations SOUTH CHINA SEA PENINSULAR MALAYSIA SULU SEA

15. Thank You