Good day and welcome to the new Western Pacific Weather website. Nevertheless the face lift effort was intend to provide a better services for all our viewer here.
Today in the South East Asia, weather remains wet over most of the region as an effect of the ITCZ (Intertropical Convergence Zone). Specifically, heavy rainfall was reported over in Thailand, Malaysia, Indonesia and even in Singapore. Information obtained from WMO shows that over in Thailand, the amount of rainfall recorded was between 50mm to 70mm while over in Malaysia, on the east coast, Kuala Terengganu receive an amount of rainfall of approximately 80mm. Over in Singapore, Changi airport was reported to have recorded an amount of rainfall of 80mm as well and finally in Batam, Indonesia, rainfall accumulated to 90mm was reported for the past 6 to 12 hour.
Here on the left side of the screen is the Isohyet map from the Malaysia Meteorological Department indicating the accumulated amount of rainfall for the past 24 hour in the Peninsula Malaysia and we can see here over the East Coast of Peninsula Malaysia specifically the state of Terengganu and Pahang has received rainfall amounted within 50 to 100mm. Similar situation happens in the states of Selangor, specifically the Klang valley and capital city Kuala Lumpur, rainfall accumulated up to 100mm has been recorded for the past 24 hour while over in the North in Penang, total accumulated rainfall was within 25mm to 50mm for the past 24 hour. Similar weather pattern are expected for the next few days with mostly afternoon showers to occur. Kindly refer to the South East Asia 3-days Outlook for a better view of the upcoming 3 days weather in the Peninsula Malaysia and also both Sabah and Sarawak.
And the image on your right side is the rainfall estimation obtained from the Malaysia Meteorological Department for the Borneo Island namely states of Sabah and Sarawak. Rainfall amounted up to 150mm was reported over the states of Sabah for the past 24 hour and if you have followed Rob’s video yesterday, he did mentioned about the heavy precipitation going on in the state due to the area of low pressure (remnants of 97w) that was located just North of Palawan. And over in Sarawak, weather seems to be fair all across the states with moderate heavy rainfall reported over certain area.
Overall, in the South East Asia region, weather are expected to improve latter this month as the South West Monsoon was about to kick start as the Monsoon transition period was reported to have end at the beginning of the month. The transition period from the North East Monsoon to the South West Monsoon occurred during the month of March and end in early of May. During the South West Monsoon period, weather in the South East Asia region specifically Malaysia, Singapore and Indonesia receive less rain compare to the North East Monsoon. The atmosphere are relatively stable at this particular time resulting a slower vertical mixing process in the atmosphere thus reducing strong convection. Weather in the Peninsula Malaysia, Singapore and the Borneo island is expected to be drier compare to other season.
In Malaysia, during the South West Monsoon season, the western coastal area of Peninsula Malaysia (Perak to Johor) are expected to experience some early morning thunderstorms or heavy rain with gusty winds. This is due to the formation of storm line in the Melaka Straits known as the “Sumatras”
However, in the Philippine, situation is the other way round, the arrival of the South West Monsoon means the beginning of the storm season. At the peak of this season, storms are expected to cross the country from the east and then moving onto the South China Sea before ending up either in Vietnam or the coastal area of Southern China. Similar storm season are expected as well in the Indian Ocean and the South West of the Pacific Ocean and North of the South China Sea.
For more detailed information and forecast on the Monsoon season beginning this May until end of the season in September specifically in Malaysia, please have a read here http://www.met.gov.my/images/Docs/laporan_monsun.pdf (In Malay language)
Meanwhile, two low system are on watch today. One of the system are just South of Davao, Invest 99W where as another system, Invest 94S are located in the Southern Hemisphere just 505NNW of Darwin, Australia. Both of the system, however, are expected to have low probability to develop into a stronger system. Do follow the discussion on our forum below.
That is all from me as of now. Stay safe and have a good day
WestPac Wx SE Asia Casters ~Francis~