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MOnthly weather bulletin JUNE 2008 1. SUMMARY Overall, the country received average to very much above average amounts of rainfall. In most places, the temperatures recorded were lower than the long-term average value. The country also recorded lower than average amounts of daily solar radiation and experienced lower rates of evaporation. 2. RAINFALL Generally, Peninsular Malaysia experienced wetter condition in June 2008 as compared to the previous month. Most places in peninsula had recorded average to very much above average amount of rainfall. However, there were certain areas in Penang, Pahang as well as Perak had undergone drier condition with recorded of below average amount of rainfall. Sabah and Sarawak continued to experience wetter condition during the month of June 2008. Both states received average to above average amount of rainfall. The rainfall distribution for Sabah was generally influenced by the side effect from the tracked of Typhoon Fengshen which had developed over the western Pacific Ocean. This typhoon tracked had induced the occurrence of strong wind and thunderstorms over coastal area of Sabah. As for total monthly rainfall, over Peninsular Malaysia; Kluang recorded the highest total rainfall of 342.0mm where as Batu Embun recorded the lowest total rainfall of 61.8mm. In Sarawak, Kuching recorded the highest total rainfall of 306.8mm while Sri Aman recorded the lowest total rainfall of 151.6mm. For Sabah, Kota Kinabalu recorded the highest total rainfall of 432.4mm while Sandakan recorded the lowest total rainfall of 151.4mm. Based on the classification scheme, there were 9 stations recorded very much above average rainfall, 8 stations recorded above average and 12 stations recorded average rainfall. Meanwhile, there were 3 stations recorded below average rainfall and 1 station recorded much below average rainfall. It was noted that Kluang had its highest monthly rainfall (342.0mm) and highest daily rainfall (87.8mm on 16 June 2008) on record for the month of June. The number of rainy days for Peninsula Malaysia ranged from 8 to 21 days while for Sabah and Sarawak ranged from 13 to 21 days.3. TEMPERATURE Generally, majority places in the country had lower than average temperature. The mean temperature of the month over lowland areas varied from 26.1°C (Mersing and Senai) to 27.8°C (Bayan Lepas and Alor Setar). Kuala Terengganu recorded the largest negative deviation of -1.3°C from normal. The mean minimum temperature over lowland areas varied from 22.9°C (Kuala Terengganu, Kluang dan Kuching) and 25.0°C (Pulau Langkawi dan Bayan Lepas). The lowest temperature of the month was 21.0°C being recorded at Kluang. The mean maximum temperature over lowland areas varied from 30.4°C (Tawau) to 33.2°C (Muadzam Shah and Kuantan). The highest temperature registered in the month was 35.6°C, in Muadzam Shah and Kluang. Cameron Highlands, a highland station, had temperature ranging from 13.7°C to 24.4°C with a mean temperature of 17.9°C. 4. SOLAR RADIATION The country generally received lower than average amount of solar radiation. The daily mean values varied from 11.70MJm-2 at Senai to 20.28MJm-2 at Kota Bharu. The largest positive and negative deviations from normal were +2.12MJm-2 and -2.86MJm-2 at Kota Bharu and Senai respectively. Cameron Highlands recorded the mean daily solar radiation at 13.01MJm-2 with the deviation of -1.31MJm-2.5 . EVAPORATION Overall, the country experienced lower rates of evaporation during this June. The daily mean evaporation rate over the lowland areas ranged from 2.8mm/day (Kluang) to 4.8mm/day (Kuala Terengganu). The largest negative deviation was -0.6mm/day (Ipoh and Pulau Langkawi) while the largest positive deviation was +0.5mm/day (Chuping). The mean daily evaporation rate at Cameron Highlands was 2.0mm/day.
Figures :
Figure
1 : Rainfall Map for Peninsular Malaysia
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