Tag Archives: frontal system

BREAKING: 29 Apr 2012 Tropical Update on Developing Tropical Low 97W Off Southeastern Mindanao

By: Weatherguy Adonis

Adonis S. Manzan

Invest 97W Sprung To Life, Torrential Rainfall Threatens Eastern Mindanao

Iloilo City, Philippines, 23 April 2012, (1600Z)–For the last five (5) days in a row of intense heat associated with the prevailing “Ridge of High Pressure,” just to the Northeast of the Philippine Sea, with temperatures soaring high as 38C in most of Northern Luzon Provinces, our tenacious little Tropical Disturbance off the Southeastern edge of Palau Island, Federated Island of Micronesia has come back to life after almost defeated by the drier conditions in the past four (4) days or so. Now that Shearing levels in the Upper atmosphere remains low, and Oceanographic values remain favourable, the system has finally entered into a new phase of life as moisture-laden clouds made a push towards the West, in a line of active thunderstorms flaring across the near-Equatorial region has led to the enhanced development of Invest 97W for the last 24 hrs.

I am made to believe that the system has a lease of life since its conception between 23 April and 24 April 2012, where most of the experts on this field of meteorology would agree on the point of warming oceans breed tenacious tropical systems that are capable of traversing vast distances longer that perceived before.

In my recent post at http://www.theboplive.net, “Warm oceans are breeding grounds of intense storm systems, and those regions where precipitable amounts of water vapor are most candidate for rapid intensification, which most scientists and meteorologists agree as main cause of intensification phase rate ranging from within five (5)  to fifteen (15%) boost potential and right conditions as regards to Wind shear and terrain variables that affects the lifespan of storms and the way they are expected to behave.”

Fig. 1.0 "MTSAT IR Imagery indicating how large the lump of clouds wrapping around Tropical Disturbance 97W as it intensifies further along the Southeastern edge of Mindanao coast. Image Courtesy: RAMMB/CIRA."


Again, I am bound to follow more than an impression, but on a generational scale, indeed, these Tropical Cyclones gather immense energy derived from the “Heat,” from the world’s oceans, and other atmospheric values such as Wind shear, Upper-level winds and prevailing weather systems should correspond to seasonal wind systems that would tend to support a stable region for tropical development.
Meantime, yesterday’s severe weather across Hong Kong territory associated with a “Trough of Low,” has now developed into a “Frontal system,” just North of Basco, Batanes and Taiwan Island. The said weather system should induce some showers extending from Northwest of Laoag City, Ilocos Sur and as far as Northeast towards the Ryukus Island Group in Southern tip of Japan, to include Naha in Okinawa.

Current Position:

As of 1832Z (0232AM-PHL/MAL), Tropical Disturbance “97W” has been located at 6.0N-129.5E, approximately 470 km East-southeast of Davao City, Philippines. Winds have reached 40 km/hr near the center, barometric readings at 1006 hPa at the moment, and is tracking Northwest at 15 km/hr.

Fig. 2.0 "An MTSAT IR Imagery I got from our colleague in Germany, Mike Adcock of the US Air Force depicting the increasingly huge banding that has been happening overnight within the system. You could immediately tell that this system could potentially have greater impacts to land mass especially terrain along the coast and hinterlands and some possibility of landslides happening and flooding. Image Credit: MTSAT IR, Mike Adcock."

It is forecast to move inland along the Eastern coast of Mindanao later evening today, Sunday, 29 April 2012 through Monday, 30 April 2012 if it maintains acceleration due West-northwest. Flooding potentials of 150 mm of rainfall totals in 24-hr period upon landfall could be expected in this system as “Orographic lift,” should bring enhanced cloudiness along the coastal regions of Southern and Eastern Mindanao as of posting in line with the banding wrapping near the system’s core, LLCC. Its outer bands have already reached the Northern edges of Mindanao and more convective rain band are slowly creeping inland which covers most of Central Mindanao by dawn breaking today.

NASA’s TRMM has been indicating a hefty 67-68 mm rainfall accumulation in a 24-hr period pegged for the system at the moment while at sea, and other sources of information I got was that the purples are evidently becoming more broader as it feeds on the relatively high sea-surface temperature as part of the “Diurnal,” processes a Tropical system are expected to undergo.

Flash floods and possible landslides especially along danger zones and mountain slopes are vulnerable during a storm so people along these areas should be warned of the dangers of staying in there, and would be wise enough to prepare and follow more than instinct but better judgment by staying on alert at all times. We will never know who’s lives would be spared from another tragedy such as last year’s worst–Tropical Storm “27W/Washi,” locally known as “Sendong,” that left vast tracts of lands and cities awash by torrential rains and the deluge that followed through, killing 1,300 people and sending thousands into shelters, and damages into almost Php2.2 Billions in infrastructure and agriculture. This time, who knows who’s life would be saved, it could be yours.

Fig. 3.0 "Another closer look at the system spawning some sporadic thunderstorms across the Eastern and Southeastern periphery of Mindanao. Image Credit: RAMMB/CIRA."

I am especially proud that our weather bureau, Philippine Atmospheric Geophysical & Astronomical Services Administration (PAGASA) has been following the development since last night, and continues to do so in keeping up with the latest of the system. The Joint Typhoon Warning Center (JTWC) in Pearl Harbour, Hawaii Island,USA and the Japan Meteorological Agency (JMA) in Tokyo, Japan has yet to issue warnings on the system.

Hope all folks in Mindanao got the news, adequate, fresh and right!

More details as the system progresses further.

This would be all for now, from your Weatherguy, hailing from the Philippines! =)

With data from NRL Mry, HKO, PAGASA and Westernpacificweather.com 

 (Note: If you have queries, email me at amanzan@smartbro.net or through weatherguyadonis@theboplive.net)

Western Pacific Remains Quiet, Brewing Trough Of Low Next Week For Japan

By: Weatherguy Adonis

Adonis S. Manzan

Low Pressure System Stalls Off Sea Of Okhotsk

Iloilo City, Philippines, 06 April 2012, (0730Z)–As the Christian world celebrate the Life, the Suffering and eventual Resurrection of our Saviour, Jesus Christ in the observance of Lent, Springtime in Japan couldn’t be more beautiful with plum blossoms across the country.  

The Japan Meteorological Agency (JMA) confirms today that the Cherry Blossoms in Tokyo is on its full bloom.  Despite the raging “Spring Storm,” last 03-04 April 2012 across Japan, settling weather conditions have been keeping the skies clear, with some sporadic cold conditions as the blustery winds from the Sea of Japan and some snow accumulations have been observed along Japan’s Northernmost region especially in higher elevations.  The area of “Low,” to date, continues to spawn moisture ahead of what’s left behind by the massive system that moved clear off Japan a few days ago.  The said system continues to linger off the Sea of Okhotsk and remains almost stationary according to JMA.  Satellite observations has confirmed the persistent colder region churning the seas, possibly blowing snow and rough conditions along the Northeastern seaboards of Hokkaido which bounds with the Kuril Islands.

Fig. 1.0 "The Sakura Blossoms in Spring in Setagaya-ku, Tokyo. JMA has said that today is the full bloom of these magnificent trees all over Tokyo. Image Courtesy: Robert Speta."

Fig. 2.0 "Desmond Speta playing around near Setagaya-ku, Tokyo with background of the beautiful Sakura trees blossoming in full today. Image Courtesy: Robert Speta."

Fig. 3.0 "a wide array of carefully nurtured Sakura trees blossoming in Tokyo gardens which prompts the arrival of Springtime in Kanto Region. Image Courtesy: Robert Speta."

A New Threat Later Next Week

In the coming week, another system could blow its way towards the Sea of Japan, as what the current European models I have referring to these past two (2) days.  A building area of “Low,” could yet again spell rainy conditions across the Western seaboards of Japan.  The said system is forecast to cross the Korean Peninsula come Tuesday next week, 10 April 2012 and traverse over the Sea of Japan and smack in the middle of it is the Honshu Region before reaching the Pacific side of Tohoku sometime mid-Wednesday and Thursday next week, while there were observations in Osaka and Honshu Region in Japan of having rains this afternoon.  Nevertheless, the overall weather condition across Japan will stay clear with some showers in spots.

Fig. 4.0 "NASA captured this imagery on 04 April 2012, which I clearly pointed out that the massive Spring Storm would continue to linger over the Sea of Okhotsk within the next 2-3 days after moving past Hokkaido on 06 April 2012. Image Courtesy: NASA."

Good Lenten Weather Across Philippines

The Ridge of High Pressure continues to linger along the Eastern coast of Zhejiang and Fujian Provinces off mainland China, extending well into Formosa (Taiwan), which I would say, induce the weak Northeasterly flow across the Northern territory of Luzon, Philippines.  Having said that, the rest of Luzon should stay largely dry conditions, with less chances of rainfall all throughout the observance of Lent, while there will be localized thunderstorm activity mostly in the later afternoon hours after the grueling heat of the Sun, to which our yearly Christian penitence as part of the “Visita Iglesia,” rites have been in full swing since Tuesday.

Fig. 5.0 "A developing Frontal System is traversing Eastwards along the Jet Stream off East Chinese mainland, being pushed Southwards by a lingering Ridge of High Pressure. Image Courtesy: NRL Mry."

By large, the rest of Southern Tagalog and Bicol Region has been used to this hyper conditions of excessive heat during the summer, but make no mistake guys and gals in the country, there will be sporadic periods of rainfall especially in the late afternoon as surging moist air associated with the Easterlies coming from the East along the East Philippine Sea, associated with the weakening “La Niña” episode across the Central Pacific Basin.

Meteorologists from around the world has been saying that the ill-effects of the said weather phenomenon has already been over, but in my opinion, the effects could still be felt largely until the “Neutral” months of July and August of this year.

A Frontal System along Southern Chinese mainland has been observed for the last 24 hrs, and is forecast to traverse Eastwards along the Jet Stream off East China Sea as it is being pushed Southwards by a lingering Ridge of High Pressure, which result to clearer conditions along the Philippine archipelago this weekend with some showers too.

Fig. 6.0 "See the colours depicted on this map which indicates the intensity of the winds thru ASCAT pass across Western Pacific Region. The deeper shades of red and oranges indicate higher wind gusts, while the blue ones and greens signify milder conditions. Image Courtesy: NRL Mry."

Lingering Floods Attributed To “02W/PAKHAR” 

Cambodia has been witnessing a post effects of the recently menacing Tropical Storm “02W/PAKHAR,” which made landfall in Southern Viet Nam City of Vung Tau.  The remnants of the said system has been feeding the flaring thunderstorms along the Thailand-Cambodia border which already, has resulted to unseasonable flooding.

This development is in contrast to Viet Nam’s case, because at the moment, it is still summer time and the Mekong River network has nor fully reached its critical point, which the farmers using the immense river system has been exceptionally glad to have running water to their fields, enough to sustain the hotter days ahead before the onset of the Typhoon season in later mid-May of this year.

Fig. 7.0 "The remnants of Tropical Storm 02W/PAKHAR lingers off Thailand-Cambobia border, where torrential rainfall has been causing localized flooding for the past 4 days. Strong fronts of thunderstorm activity generate severe weather across the region, despite the tropical moisture is expected to head Polewards. Image Courtesy: NASA."

More details coming right up.  Keep it here, www.westernpacificweather.com for the very latest on Tropical Updates from the Region and the rest of the Pacific and Oceania Basin.

This has been your Weatherguy hailing from the Philippines, Mabuhay! =)

 With data from JMA, HKO, NOAA, NASA, NRL Mry, Westernpacificweather.com and Typhoon2000.com
(Note: If you have queries, email me at amanzan@smartbro.net or through weatherguyadonis@theboplive.net)