Gale Warning
Issued at: 5:00 PM TODAY , 09 December 2019
Gale Warning # 30
For: strong to gale force winds associated with the surge of the northeast monsoon

Gale Warning in PDF file



Weather Advisory
Issued at: 10:00 AM 2019 December 09
Weather Advisory in PDF file




General Flood Advisories - Regional
 General Flood Advisory issued as of 7 PM, 20 August 2018



Advisories


Monthly Climate Assessment and Outlook (July-August 2018)

Issued: 06 August 2018

Monthly Rainfall Forecast
RAINFALL FORECAST  (September 2018 - February 2019) 
UPDATED: 29 August 2018 (next update September 26, 2018)


Regional Rainfall Forecast
Issued: 29 August 2018
Valid for: September 2018 - February 2019
Farm Weather Forecast and Advisories
ISSUED: 8 AM,  FRIDAY,  MAY 24, 2019
VALID UNTIL: 8 AM,  SATURDAY, MAY 25
, 2019
FWFA:  N0. 19-144

Ten-Day Regional Agri-Weather Information
DEKAD NO. 15   MAY 21 - 31, 2019
PHILIPPINE AGRI-WEATHER FORECAST
The weather systems that will affect the whole country are the frontal system, easterlies, ridge of high pressure area, intertropical convergence zone (ITCZ) and low pressure area (LPA).

Seasonal Climate Outlook
Issued:  13 July 2018
FOR July - December 2018
PDF 




Astronomical Diary
Issue for October 2018
The October Orionids meteor shower will be active from October 17-25, 2017.




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El Niño/Southern Oscillation (ENSO)
El Niño Phenomenon


What is El Niño?

El Niño is a large scale oceanographic/meteorological phenomenon that develops in the Pacific Ocean, and is associated with extreme climatic variability i.e., devastating rains, winds, drought, etc. It is the migration from time to time of warm surface waters from the western equatorial Pacific Basin to the eastern equatorial Pacific region, along the coasts of Peru and Ecuador. This condition can prevail for more than a year thus adversely affecting the economy in both local and global scale.

El Niño translates from Spanish as the “Boy Child” or the “Little One”. It used to be considered a local event along the coast of Peru and Ecuador. The term was traditionally used by the Peruvian anchovy fishermen to describe the appearance of warm ocean current flowing the South American coast around Christmas time.

In normal condition, the prevailing southeasterly trade winds produce a surface current flowing toward the equator along the western South American coast. The waters leaving the coast are replaced by colder waters from below (upwelling), which is rich in phytoplankton, the food source of anchovy.

The warm current (El Niño) temporarily displaces nutrient-rich upwelling cold water resulting to heavy harvest of anchovies. The abundant catch, however, lasted for only a short period of time. What followed later was a sharp decline in the fish population resulting in lesser catch. At times, warming is exceptionally strong and ruins the anchovy harvest.

Characteristics of El Niño

•It occurs in the Pacific basin every 2 to 9 years;
•It usually starts during the Northern winter (December to February);
•Once stablished, it lasts until the first half of the following year, although at time , it stays longer (ex: 1939-1941 and 1989-1992 episodes);
•It exhibits phase-locking at annual cycles (El Niño and rainfall fluctuations with it tend to recur at the same time of the year); and
•It usually has a biennial cycle (El Niño events will often be preceded and/ or followed by La Niña).

What are the climatic indicators of El Niño phenomenon in the Philippines?

•Delayed onset of the rainy season
•Early termination of the rainy season
•Weak monsoon activity isolated heavy downpour with short duration
•Far tropical cyclone track
•Less number of tropical cyclones entering the PAR

What are the effects of ENSO in the Philippines?

In the Philippines, drought/dry spell events are associated with the occurrence of El Niño.

What provinces were already affected by drought/dry spell in the Philippines during the May to August 2015 rainfall assessment?

See maps and figures below.dryspell drought assess july31drought dryspell assessment May31 editedsize


PUBLIC WARNING 


It has come to the attention of the Office of the Administrator of PAGASA that a certain person has been using the name of Dr. Vicente B. Malano to solicit money from the contractors of PAGASA.

Dr. Malano wishes to inform the public that he has not authorized anyone to solicit money on his behalf and to warn everyone against dealing with unscrupulous activities of certain individuals.





payong pagasa on android The latest version of the official PAGASA app can now be downloaded on Google play store

List of Trainees for the Meteorological Technicians Training Course (MTTC) 2019

The following have been accepted to undergo the Meteorological Technicians Training Course (MTTC), scheduled on 06 May – 14 October 2019

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Weather Division is now  ISO 9001:2015 Certified

Proof has been furnished by means of an audit that the requirements of ISO 9001:2015 are met.

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ONSET OF RAINY SEASON
14 June 2019

The occurrence of scattered to at times widespread rainfall associated with the Southwest Monsoon during the past few days as observed by most PAGASA stations...


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