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As we are about to end the month of September, two Low Pressure Areas (LPAs) developed within the Philippine Area of Responsibility (PAR). An LPA was spotted at 215 kilometers east-northeast of Infanta, Quezon and the other one was last located at 640 km east-northeast of Surigao City, Surigao del Norte.


PAGASA Weather Forecaster Robert “Obet” Badrina said that the probability for these weather disturbances to develop into Tropical Cyclones remains slim. However, both LPAs are expected to dump rains in several parts of the archipelago.


Visayas, Davao Region, SOCCSKSARGEN and ARMM will have cloudy skies with scattered rain showers and thunderstorms. The same weather condition will prevail in the regions of Cagayan Valley, Cordillera and Ilocos, as well as the provinces of Aurora and Quezon. Meanwhile, Metro Manila and the remaining parts of the archipelago will have partly cloudy to cloudy skies with isolated rain showers or thunderstorms.

Badrina explained that it is normal to have two LPAs in the Philippine premises at the same time. This scenario is due to the active Intertropical Convergence Zone (ITCZ), which is also dubbed as the breeding ground of weather disturbances.

Rains are more likely to prevail due to the Intertropical Convergence Zone (ITCZ). The ITCZ is an area where winds coming from the Northern and Southern Hemispheres meet. Converging winds trigger cloud formation, bringing a high chance of precipitation.


Cloudy skies with scattered rain showers and thunderstorms will be experienced in Central and Western Visayas, Caraga, Davao Region and SOCCSKSARGEN. Metro Manila and the remaining parts of the archipelago will have partly cloudy to cloudy skies with isolated rain showers or thunderstorms. No gale warning was issued today as slight to moderate seas will prevail in the entire archipelago.


Meanwhile, the cloud cluster being monitored outside the Philippine Area of Responsibility (PAR) still has a chance of developing into a Low Pressure Area (LPA). In an interview with Panahon TV, PAGASA Weather Forecaster Meno Mendoza said that it may move closer to the Visayas area in the next few days.


Mendoza added that as we approach the month of October, temperatures will gradually drop. Amihan Season usually occurs in the late October until the early part of November. The Northeast Monsoon or Hanging Amihan is composed of cold and dry air coming from Mainland China or Siberia and is responsible for bringing cooler weather in the Philippines.



In an interview with PAGASA Weather Forecaster Gener Quitlong, the Low Pressure Area (LPA) has already exited the Philippine Area of Responsibility (PAR). It was last located at 395 kilometers north of PAGASA Island, Palawan. Quitlong added that it may eventually weaken or dissipate in the next hours.

Despite the absence of a weather disturbance within PAR, rains will prevail in some parts of the country particularly in Mindanao due to the Intertropical Convergence Zone (ITCZ). The ITCZ is the meeting point or the boundary of winds coming from the Northern and Southern Hemispheres. It is composed of convective clouds which will bring rains in affected areas.

Caraga, Davao Region, Northern Mindanao and SOCCSKSARGEN will experience cloudy skies with scattered rain showers and thunderstorms. Residents are alerted against possible flooding in low-lying areas. Meanwhile, Metro Manila and the rest of the country can expect partly cloudy to cloudy skies with isolated rain showers or thunderstorms.

Quitlong added that a cloud cluster is being monitored outside PAR. The clouds, which continue to grow dense, may possibly develop into an LPA. The weather bureau continues to monitor its further development.

LPA brings rains
 
Cloudy skies with light to moderate rains and thunderstorms may still occur in some parts of the country due to the Low Pressure Area (LPA).
 
At 3:00 AM, an LPA was located at 115 kilometers north of Coron, Palawan. Although it is no longer expected to develop into a Tropical Cyclone, lightning, moderate to occasional heavy rains, strong winds and flashfloods may still occur in some areas. These include Metro Manila, Central Luzon, MIMAROPA, CALABARZON, Bicol Region, Western Visayas, Caraga, Northern Mindanao and Davao Region.
 
For the rest of the country, partly cloudy to cloudy skies will prevail with chances of isolated rain showers or thunderstorms.
 
Today in History
 
Exactly eight years ago today, Tropical Storm Ondoy made landfall in the boundary of Aurora and Quezon, and crossed Central Luzon for 12 hours. On the same day, it enhanced the habagat, which brought rains concentrated in Metro Manila, Central and Southern Luzon, and some parts of Visayas and Mindanao.
 
Based on the final report of the National Disaster Risk Reduction and Management Council (then the National Disaster Coordinating Council), Tropical Storm Ondoy affected 4.9 million people in the country. The catastrophic storm also took 464 lives, injured 529 and caused 37 unaccounted for.
 

 
New LPA enters PAR
 
A new weather disturbance has developed within the Philippine Area of Responsibility (PAR).
 
At 3:00 AM today, the Low Pressure Area (LPA) was estimated based on all available data at 245 kilometers east-southeast of Hinatuan, Surigao del Sur.
 
Although it has a slim chance of developing into a tropical cyclone, the LPA will still bring rains to some areas.
 
Today, cloudy skies with scattered rain showers and thunderstorms will prevail in Metro Manila, Bicol Region, CALABARZON, MIMAROPA, Mindanao, Visayas and the province of Aurora. Partly cloudy to cloudy skies with isolated rain showers or thunderstorms will be experienced in the rest of the country except for chances of localized thunderstorms.
 

 
Tropical Depression Nando has exited the Philippine Area of Responsibility (PAR).
 
At 3:00 AM, it was spotted at 625 kilometers west of Sinait, Ilocos Sur. It has maximum sustained winds of 45 kilometers per hour (kph), gustiness of 60 kph, moving west-northwest at 24 kph. According to PAGASA Weather Forecaster Rob Gile, this weather disturbance has no direct effect on the country.
 
Although “Nando” has exited PAR, a new weather disturbance is being monitored. According to Gile, a trough of a Low-Pressure Area (LPA) is affecting the eastern section of Mindanao.
 
Due to this weather system, Surigao del Sur, Compostela Valley, Davao Oriental, Davao del Sur and Davao Occidental are alerted against possible lightning, moderate to occasionally heavy rains, strong winds, and flash floods.
 
Meanwhile, Luzon, Visayas and the remaining parts of Mindanao will experience a generally fair weather except for chances of localized thunderstorms.
 

 
Two weather systems will dump rains this weekend.
 
These include a Low Pressure Area (LPA) inside the Philippine Area of Responsibility (PAR) and the Southwest Monsoon affecting the western sections of Southern Luzon and Visayas.
 
At 3:00 AM today, the LPA was spotted at 40 kilometers north-northeast of Alabat, Quezon. PAGASA Weather Forecaster Samuel Duran said, the possibility that the LPA would develop into a tropical cyclone remains slim but it will still dampen Luzon as it approaches the landmass.
 
Today, areas in Luzon and Western Visayas will have cloudy skies with scattered rain showers and thunderstorms due to the LPA. These rains may trigger flash floods and landslides. Meanwhile, the remaining parts of Visayas and Mindanao will experience a generally fair weather except for chances of localized thunderstorms.
 



A Low Pressure Area remains inside the Philippine Area of Responsibility (PAR) and was last spotted at 175 kilometers northeast of Hinatuan, Surigao del Sur. This disturbance is a weather system where the atmospheric pressure is lower than its surroundings.

PAGASA Weather Forecaster Meno Mendoza said the possibility for this LPA to develop into a Tropical Cyclone remains slim but it will continue to dump rains in most parts of the archipelago.

Visayas, Mindanao, Bicol Region and the provinces of Mindoro, Marinduque and Romblon will have cloudy skies with scattered rain showers and thunderstorms. The same weather condition will be experienced in Palawan due to Hanging Habagat. Meanwhile, Metro Manila and the rest of the country can expect partly cloudy to cloudy skies with isolated rain showers or thunderstorms.

Mendoza noted that rains may last until the weekend so the public is advised to monitor updates. He added that the Habagat may still affect the archipelago until the end of the month. The transition period wherein the shifting from the Habagat to Amihan Season is anticipated in October.


For sea travellers, no gale warning was issued today. Northern and Central Luzon, as well as Southern Luzon, Visayas and Mindanao will have slight to moderate sea conditions. Fishing boats can safely venture out into the seas but should always take caution.

 
After a two-week hiatus, the Southwest Monsoon prevails in the country again.
 
Locally known as Habagat, the Southwest Monsoon is defined as warm and moist winds moving in a southwest direction. Due to these characteristics, Habagat can cause monsoon rains that can last for a couple of days or even a week.
 
Cloudy skies with light to moderate rain showers and thunderstorms will prevail in Visayas, Mindanao, the Ilocos Region, the Cordillera Administrative Region, MIMAROPA, Batanes and the Babuyan Group of Islands. Meanwhile, the rest of Luzon including Metro Manila will experience generally fair weather with localized thunderstorms.
 

 
 
Special Weather Forecast
 
Classes in public schools and work in government offices for tomorrow September 21, 2017 have been suspended. According to Malacañang, the declaration is in line with the 45th anniversary of the declaration of Martial Law and will not be a special non-working holiday but a “Day of Protest.”
 
Pro and anti-government activities are expected to be staged tomorrow, while some may use the suspension to unwind from work and school. According to PAGASA, no weather disturbance is expected to affect the country during the observance.