Malaysian Flood Portal indicate that there are at least 14 flooding spot in the States of Selangor as of 1200 (Phil/Mal) but none of the area are possessing threat to nearby residents. Meanwhile over in other states in Peninsula Malaysia, rainfall accumulated between 5 to 100mm was recorded but no threat of flooding are reported. Meanwhile, over in Thailand, heavy rainfall has been dominating the Northern region of Thailand. Total precipitation up to 150mm in the past 24 hour was recorded and is illustrated in the imagery on your right. The Thailand Meteorological Department has issued its 12th heavy rain and flash flood warning at 0530 (Thai) stating: "The active southwesterly winds affect torrential rainfall overall country while isolated heavy rain occurs mainly in the North. People in the risky areas should beware of flooding conditions during 8-9 May. The areas include Chiang Mai, Chiang Rai, Lamphun, Lampang, Phrae, Nan, Uttaradit, Phitsanulok, and Phetchabun All ships in the Andaman Sea should proceed with caution during 1-2 days. The advisory is in effect for Thailand from 8 May 2012" With that said we do not rule out the possibility of flooding threat over in Thailand therefore we urge all our viewers who are in the mentioned area to take extra precautionary and be alert on the latest warning by the local authority. That's all from me right now and stay tune for the latest updates on the tropical low that is currently lingering around the region. Also, please do check out on the South East Asia 3-days outlook later on. I have included Indonesia in the weather forecast as well which mean most of the area in the South East Asia is now covered. For forecast in the Philippine, do stay tune with Pat's update. Stay safe and have a great day. WestPac Wx Weather Casters ~Francis~As reported in Rob's yesterday video updates, the South East Asia has been much bombarded by heavy rain specifically in Thailand and Malaysia. The imagery on your left is the Isohyet map obtained from the Malaysia Drainage and Irrigation department showing the accumulated rainfall in the Peninsula Malaysia for the past 24 hours. Heavy rain was reported over much of the area with the state of Selangor is the heaviest of all with heavy precipitation up to 200mm in the last 24 hour. Detailed information from the DID of Malaysia shows that the town of Batang Kali in Hulu Selangor, recorded 180mm of rainfall, Ulu Yam (174mm), Kg. Kalong Tengah (143mm) and Serendah (109mm). Latest report from the
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. Invest 99W -> http://www.westernpacificforecast.com/nwpac-invest-99w-t44.html Invest 94S -> http://www.westernpacificforecast.com/swpac-invest-94s-t43.html That is all from me as of now. Stay safe and have a good day WestPac Wx SE Asia Casters ~Francis~
By: Weatherguy Adonis
Record Scorcher Across Western Pacific, Blowing Yellow Sand Tracks To Japan's NortheastIloilo City, Philippines, 23 April 2012, (1600Z)--Intense heat induced by prevailing "Ridge of High Pressure," along the Northwest Pacific has caused record-high temperatures across Southeast Asia. In Manila, Philippines alone, the state weather bureau, Philippine Atmospheric Geophysical and Astronomical Services Administration (PAGASA) has yet again raised the alarm of excessive heat in the metro where Mercury rising rapidly at maximum of 36.8C at 0700Z (0300PM-PHL/MAL), recorded at Science Garden in Quezon City, and a lot higher at 38C in Cabanatuan City. Many Filipinos have been trying to keep cool under the heat of the Sun as this year's Summer heat was among the most intense since 2010. As the heat continues to peak usually this April, a respite from all these has not yet arrived and there had been observations that in the country alone, for the last decade, the number of hotter-than-usual periods have become more evident, which now ushers lesser number of hours of cooling, as a result, the relative humidity in cities across the country have been intensely associated with the prevalence of concrete structures and lesser vegetation as compared to the rural areas where lush trees, open spaces and adequate interval between structures can still be found. At some point there had been sporadic rains associated with the "Orographic lift," from which warm air collides with cold air, where such occurrence usually happen along the terrains or near bodies of water, that could produce precipitable water in the clouds, that could propagate rain-bearing thunderstorms, if all things go well into place. In Thailand capital Bangkok, temperatures soar at 40C, one of the most extreme in the region so far, wherein Tropical moisture have become trapped especially in the metropolis heat where paved roads, wide concrete spaces and towering superstructures tend to trap in the heat and increase the "Real-feel," of the human body as relative humidity also shoots up and as "H2O molecules," becomes super-heated, the air becomes rapidly evaporates and condensation do not eventually result to rain-bearing clouds, which only add up to the unbearable heat. Terrible Heat Spawn Thunderstorms Usually, "Cumulonimbus," (Cb) clouds form due to rising of warm air and colliding with cooler winds produce rain-bearing clouds, but are commonly referred to as developing thunderstorms, which shoots higher into the upper atmosphere several thousands of kilometers in altitude to begin a process of evaporation and condensation that could potentially bring some severe weather, at some point lead to "Hail" storms and in some occasions, they become so severe, it may produce some "Tornado," in the process. Malaysia Peninsula, however got some cloudy periods but less rainfall was being reported. Borneo however, has gotten some precipitation today under the intense tropical heat. Severe Weather Over Hong Kong Territory In Hong Kong, authorities have been issuing warnings for potentially "Severe," storms brought about by a lingering "Low" over the territory which has traversed Central China for the last two (2) days. It has already brought huge amounts of rainfall and lightning storms can be seen across the metropolis throughout the night. The said weather system should continue to track Eastwards, reaching Northern Taiwan by tomorrow afternoon, and by Sunday, it should affect the Southern seaboards of the Korean Peninsula and once again, Japanese coast can expect another wave of severe weather, with potential for high winds, thundery rains well into Monday work-week if the system does not stall over the Yellow Sea and Sea of Japan in the process. At the moment, a choking and blinding "Dust storm," from the Gobi Desert, has been whipping towards the Yellow Sea from Northern and Eastern Chinese border. The Westerlies prevailing over the region, compounded by dry winds blowing to the East, as the exiting "Low," that has traversed over Japanese Islands these past few days have been tracking Northeastwards, pulling along with it the "Yellow wind," dubbed as "Aeolian sand," which has now reached the Northernmost region of Hokkaido. The said phenomenon intervenes with visibility in the region, and at times, cancellation of transportation can add up to the anxiety especially during windy conditions. Tropical Disturbance "97W," has been battered by the persistent "Ridge of High Pressure," North of it for the last three-four (3-4 ) days now, and the compounding drier region of air mass has been inflicting detrimental conditions to its "Low-level circulation center," (LLCC). The Joint Typhoon Warning Center (JTWC) in Hawaii Island, USA has pegged the system has a "Low" chance of development. Looking Forward Into The Forecast Meanwhile, the trailing Intertropical Convergence Zone (ITCZ) across the Tropics, has been more evident along the lower Pacific, near the Equator, which has yet to usher more thunderstorm activity Westwards, and has a potential to spawn a Tropical Cyclone in the foreseeable weeks. This would be all for now, from your Weatherguy, hailing from the Philippines! =) With data from NRL Mry, JMA, HKO, MalayMet, PAGASA and Westernpacificweather.com (Note: If you have queries, email me at email@example.com or through firstname.lastname@example.org)
By: Weatherguy Adonis
Tsunami Watch Across Indian Ocean, Atlantic Basin LiftedIloilo City, Philippines, 12 April 2012, (0400Z)--Tsunami scare now has past across vast regions in Indian Ocean Basin and farther to Atlantic Ocean. The Pacific Tsunami Warning Center (PTWC), in Pearl Harbour, Hawaii has issued in its bulletin at around 1236Z (0836PM-PHL), 11 April 2012, that the danger has past, therefore the lifting of such warning was found necessary to ease the concerns along the immediate coasts. Later, a supplementary bulletin was issued around 1318Z (0918PM-PHL). These are some of the gallery of photos I got from Reuters Newswires: The highest "Tsunami waves" on record has struck Suak Uleue, Indonesia at 6.0 m (20 ft) at about 01.26 hrs after the seismic event has commenced off the Northern Sumatran coast along the Sunda Trench. A maximum read of "Tsunami," wave height of 1.8 m (6 ft) was recorded in Naibos, Indonesiaat around 01.08 hrs after the initial 8.7 Mb event. In Meulaboh, Indonesia, a 1.06 m (3.5 ft) was recorded at coastal tide gauges was also registered. The massive main shock registered a whopping 8.6 Mb, located at about 434 km (270 mi) Southwest of Banda Aceh, the capital of Indonesia's Aceh province, the U.S. Geological Survey has issued in its website. The epicenter was pegged to be at a depth of 23 km (14 mi) beneath the surface, making this geologic event one of the most shocking to have hit the region since the historic 26 December 2004's massive 9.1 Mb Temblor, dubbed "Great Sumatran Earthquake." Two (2) hours later, a large aftershock has hit of 8.2 Mb, just West coast of Northern Sumatra, which among the closest city centers of Singapore, Bangkok were shaken by the massive tremor, and reports of violent shaking was also observed in several areas across Thailand and Malaysia. Witnesses lamented the frightening situation as the violence lasted for more than three (3) to five (5) minutes, in an interview with local television network in Bangkok, wherein the high-rise buildings were swaying longer than they have experienced since the 2004 seismic event. 2004 Boxing Day Tsunami Reminisced, Warnings In Place The 2004 "Boxing Day Tsunami," was generated across underneath the Indian Ocean, that has left 273,000 dead and thousands injured, and has destroyed the coastal cities and townships along the immediate fourteen (14) countries, costing $10 Billions worth of damages in infrastructure and livelihood, which took place 250 km (155 mi) South-southeast of Banda Aceh at a depth of 30 km (19 mi) beneath the surface. The said "Tsunami," was a singularly most horrendous natural disaster to have struck the region according to the United Nations (UN), which sparked an international relief effort. A Tsunami Warning System was then taken into account and a study was conducted for implementation. It was carried out to ready the Indian Ocean for yet another seismic event such as this, and evidently has created a huge interest on the aspect of drills conducted and appropriate dissemination to advance the required evacuations when the need arises. Tsunami Science "Tsunamis," are characterized as shallow-water waves. Shallow-water waves are different from wind-generated waves, the waves many of us have observed on a the beach. Wind-generated waves usually have period (time between two sucessional waves) of five (5) to twenty (20) seconds and a wavelength (distance between two sucessional waves) of about 100 to 200 m (300 to 600 ft). A "Tsunami," can have a period in the range of ten (10) minutes to two (2) hours and a wavelength in excess of 500 km (300 mi). It is because of their long wavelengths that tsunamis behave as shallow-water waves. A wave is characterized as a shallow-water wave when the ratio between the water depth and its wavelength gets very small. The speed of a shallow-water wave is equal to the square root of the product of the acceleration of gravity (32ft/sec/sec or 980cm/sec/sec) and the depth of the water. The rate at which a wave loses its energy is inversely related to its wavelength. Since a "Tsunami," has a very large wave length, it will lose little energy as it propagates. Hence in very deep water, a "Tsunami" will travel at high speeds and travel great transoceanic distances with limited energy loss. For example, when the Ocean is 6100 m (20,000 ft) deep, unnoticed "Tsunami," travel about 890 km/hr (550 mi/hr), at about the speed of a jet airplane. And they can move from one side of the Pacific Ocean to the other side in less than one day. As a "Tsunami" leaves the deep water of the open sea and propagates into the more shallow waters near the coast, it undergoes a transformation. Since the speed of the tsunami is related to the water depth, as the depth of the water decreases, the speed of the tsunami diminishes. The change of total energy of the tsunami remains constant. Therefore, the speed of the "Tsunami," decreases as it enters shallower water, and the height of the wave grows. Because of this "Shoaling" effect, a "Tsunami" that was imperceptible in deep water may grow to be several feet or more in height. Huge Earthquake Strikes Off Mexico Update on yet another massive 7.0 Mb Earthquake that has struck 18.50N-102.65W, at about 52 km South of Guadalajara in Mexico, with population of 1,640,589, at around 2255.18Z (1755.18PM-local time), or 24 km West of Arteaga, with population density of 9,550 more or less. There were no reports of damage or casualties at the moment. The PTWC has issued an information statement about this seismic event, but no Pacific-wide "Tsunami," was ever issued to that effect. This has been your Weatherguy hailing from the Philippines, Mabuhay! Stay safe guys!
(Note: If you have queries, email me at email@example.com or through firstname.lastname@example.org)