Lightning In Malaysia

Distribution of lightning flashes across the earth Malaysia
Distribution of lightning flashes across the earth

Introduction :
» Lightning is natural phenomena (just like rain, sunshine, trees, animal)
» We do not know exactly where lightning will strike.
» We cannot prevent lightning strike
» We can provide the path for lightning flow and avoid damages.
» Lightning an Issue in Malaysia
» Typical Isokeraunic Level in Malaysia -200 Thunder Days per Year
» 80% Lightning of Negative Discharge Mean of 20kA Current Discharge with Steep Current Impulse of <1µsec

Monthly trends In Malaysia
» High during inter-monsoon (April to May)
» Moderate during Southwest monsoon (May to Sept)
» Low during Northeast monsoon (Dec to March)

Lightning stroke density map Peninsular Malaysia
Lightning stroke density map Peninsular Malaysia

Strike Force - Average number of thunderstorm days per year in Malaysia
Strike Force - Average number of thunderstorm days per year in Malaysia

  • 200 Subang, Selangor
  • 197 Ipoh, Perak
  • 184 Bayan lepas, Pulau Pinang
  • 182 Kuching, Sarawak
  • 182 Kuching, Sarawak
  • 180 KLIA Sepang, Selangor
  • 177 Kluang, Johor
  • 169 Senai, Johor
  • 162 Mersing, Johor
  • 160 Batu Pahat, Johor
  • 158 Butterworth, Pulau Pinang
  • 156 Sitiawan, Perak
  • 154 Kuantan, Pahang
  • 151 Petaling Jaya, Selangor
  • 151 Bintulu, Sarawak
  • 147 Melaka
  • 143 Tawau, Sabah
  • 140 Sandakan, Sabah
  • 136 Kuala Terengganu, Terengganu
  • 135 Alor Setar, Kedah
  • 135 Labuan
  • 131 Muadzam Shah, Pahang
  • 130 Kuala Krai, Kelantan
  • 129 Kota Kinabalu, Sabah
  • 120 Pualau Langkawi, Kedah
  • 118 Cameron Highland, Pahang
  • 113 Sibu, Sarawak
  • 110 Limbang, Sarawak
  • 99 Sri Aman, Sarawak
  • 93 Miri, Sarawak
  • 90 Temerloh, Pahang
  • 80 Kapit, Sarawak
  • 75 Kudat, Sabah

Notes : Land of lightning | The Star
        The anecdotal evidence is backed up by hard facts - according to our Meteorological Department places like Subang (Selangor), Bayan Lepas (Penang) and Kluang (Johor) have a whopping 180 to 200.
        In contrast, figures from the National Lightning Safety Institute (NLSI) of the United States show far fewer TDs in Japan (35-40), Australia (10-70), most of Europe (15-40) and England (a paltry 5-10). Even Florida, considered the "lightning capital" of the USA, has "only" 90-110 TDs.
        Another NLSI measurement is that of "lightning density" where Kuala Lumpur is ranked fifth in the world with 48.3 lightning strikes (to the ground) for every square km of real estate. (The other top four lightning density sites are in Rwanda and the Democratic Republic of Congo.)

Articles : Subang tops world for lightning activity
Posted on 14 March 2008 - 08:48pm

        IN the Guiness Book of World Records, Cibinong in West Java, Indonesia, has been recognised as the place with the highest lightning activity in the world when the weather station there recorded 322 days with lightning in 1988. It was also claimed that lightning struck the ground at the rate of 12 ground flashes per square km per year. While these figures looked pretty impressive, they are small when compared to what we have over here.
        According to the climate data provided on the Malaysian Meteorological Department (MMD) website, the Subang weather station recorded 362 days with lightning in 1987. This means that the meteorologists manning the station had observed lightning occurring somewhere in the sky for almost every day of that year.
        Another measure of lightning activity which is recognised by the World Meteorological Organisation (WMO) is the thunderstorm day. This is defined as a day where thunder is heard at the station which signifies the presence of a nearby thunderstorm. The WMO also has a formula to translate the annual thunderstorm day information into the lightning ground flash density figure.
        According to MMD records, Subang has an average of 190 thunderstorm days per year which is translated to between 25 and 40 lightning ground flashes per square km per year. Again this figure is much higher than that claimed for Cibinong.
Perhaps it is high time for the MMD to inform the above facts to the Guiness Book of World Records so that Subang is recognised as the most lightning active area in the world.
        For residents living in Subang and the nearby areas, please ensure that their properties are well protected with lightning protection systems that meet Sirim standards.

Reference :
[1]Sun Media Corporation Sdn. Bhd. | Zahar |
[2]TNB Research Sdn Bhd | Noradlina Abdullah | Joint Industry Study on Lightning Protection | 23-24 June 2009, Bangi, Malaysia
[3]Star Publications (M) Bhd (Co No 10894-D) | BY ANDREW SIA AND ELIZABETH TAI | Land of lightning | Sunday May 17, 2009 |

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