Gale Warning
Issued at: 5:00 PM TODAY , 05 April 2017
Gale Warning # 10 (Final)
For:

Gale Warning in PDF file





Monthly Climate Assessment and Outlook

Issued: 04 May 2017

Monthly Rainfall Forecast
RAINFALL FORECAST  (May - September 2017) 
UPDATED: 05 April 2017 (next update 26 May 2017)


Regional Rainfall Forecast
Issued: 05 April 2017
Valid for: April-September 2017
Farm Weather Forecast and Advisories
ISSUED              :  8AM, FRIDAY, MAY 26, 2017
VALID UNTIL      :  8AM, SATURDAY, MAY 27, 2017
FWFA:  N0. 17-146


Ten-Day Regional Agri-Weather Information

DEKAD NO. 15 May 21 - 31, 2017

PHILIPPINE AGRI-WEATHER FORECAST

The weather systems that will affect the whole country are frontal system, easterlies, southwest monsoon and intertropical convergence zone (ITCZ).

Throughout the dekadal period, Northern Luzon especially Ilocos Region, CAR, Cagayan Valley will be cloudy with light to moderate rains and isolated thunderstorms. Mindanao will experience cloudy skies with rainshowers and isolated thunderstorms due to enhanced convection brought by ITCZ. While the rest of the country will have fair weather with possible isolated rainshowers or thunderstorms mostly in the evening or afternoon.

Light to moderate winds coming from southeast to east will prevail over Mindanao, Visayas and eastern section of the country and from southwest over western section especially of Northern Luzon.

During the forecast period, the coastal waters throughout the whole country will be slight to moderate seas.

The eastern and central equatorial Pacific is in neutral condition.


Seasonal Climate Outlook
Issued:  20 January 2017
FOR January - June 2017
PDF 




Astronomical Diary
Issue for May 2017
The month of May marks the occurrence of Eta Aquarid meteor shower...




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The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) is mandated by law, as the government agency tasked to keep and disseminate the Philippine Standard Time (PhST).

PAGASA atomic clock

THE PAGASA TIME SCALE SYSTEM
History of PAGASA Time Service 

The Time Service Division was established as one of the major units in the then Weather Bureau sometime in 1949. Its master clock was a U. Nardin Marine Chronometer, with pendulum regulator, which was utilized as a dispatch clock. A short synchrome ensemble replaced the marine chronometer in 1951 and a quartz crystal clock improved the system in 1965.

Since then, there was no major improvement that had been done with the system, except for the acquisition of a Digitizing Oscilloscope. In 1988, the Time Service Division was downgraded to the Time Service Unit (TSU), together with the reorganization of the PAGASA. In 1996, the TSU acquired a Luminous Digital Clock and a Global Positioning System (GPS), which were installed in 1997, as its primary reference timing system.

In 2003, TSU was transferred to the newly renovated Transit Building of the PAGASA Astronomical Observatory, equipped with the new timing equipment, known as the Rubidium/Global Positioning System Common View (Rb/GPSCV) Time Transfer System. The said time equipment was decommissioned by the unit after it was hit by a lightning on June 09, 2013. An alternative time source had been obtained by PAGASA through the ICT group, ETSD by acquiring two secondary frequency standards that were installed at the WFFC building and at the Planetarium Building. The first is used to disseminate the PhST via NTP and the other one is utilized as a back-up. Another back-up support is a 5225B Time Node made by Oscilloquartz that was installed at the PAGASA Astronomical Observatory, in case the two S350’s bogged down.

In 2015, PAGASA acquired a new time equipment known as the PAGASA’s Precise Time-Scale System. This timing equipment is an independent timing chain (real-time clock) consisting of three high-performance cesium clocks, real-time clock steered to UTC using GNSS timing information, distribution for 5 MHz, 10MHz, AM/DC IRIG-B, 1 PPS and NTP. It is a world class timing system comparable to the best national time laboratories with commercial and hardware support. The new timing equipment was purchased by PAGASA to establish a national timing reference and to satisfy the requirement of the existing laws on time and frequency services in the country.

The time equipment was about the size of a large refrigerator, composed of three high performance of atomic cesium clocks for holdover redundancy and is plugged into the network time protocol (NTP) of the Philippine Standard Time. The atomic clock tells the time by measuring the oscillation of energized atoms in an electromagnetic field.

The time equipment is also capable of serving as a stratum 0 Network Time Protocol (NTP) server, providing Internet time dissemination. NTP is a means of synchronizing computer clock over the Internet. With this system, the Philippine Standard Time (PhST) kept by the time scale system, will be available on-line in the PAGASA website, and the NTP program will allow transfer of this time to clients accessing the site. Government and private TV stations shall be encouraged to avail of this service and pass on to the general public, through their regular time checks and their clocks shown on the TV screen, derived and synchronized time with PAGASA’s Precise Time-Scale System. Radio stations shall then be requested through the Kapisanan ng mga Brodkaster ng Pilipinas (KBP) to copy the time being broadcasted by these TV stations to provide an accurate and timely nationwide coverage of the PhST.


PAGASA CLOCK STRATA:

PAGASA Clock strata

STRATUM 0 (PAGASA TIME SCALE SYSTEM)
PAGASA’s Time Scale System with three-high performance cesium clocks. This is also known as the reference clock of the Philippine Standard Time (PhST)

STRATUM 1 (SYMMETRICOM S350s and OSA 5225B TIME NODE)
Symmetricom S350s and OSA 5225B Time Node, whose system clocks are synchronized to within a few microseconds to PAGASA’s Time Scale System. These are servers that are peered to each other for sanity checking and backup.

STRATUM 2 (PAGASA’s NETWORK TIME PROTOCOL SERVER SYSTEM)
These are computers that are synchronized over a network to stratum 1 servers. PhST can be accessed via ntp.pagasa.dost.gov.ph or by accessing the IP address 202.90.128.226

STRATUM 3 (SERVER/COMPUTER CLIENTS THAT ARE CONNECTED TO PAGASA’s NTP)
These are computers that are synchronized to stratum 2 servers. They employ exactly the same algorithms for peering and data sampling as stratum 2, and can themselves act as servers for stratum 4 computers, and so on.

The Philippine Standard Time (PhST)

  • Batas Pambansa Blg. 8, an act of defining the metric system and its units, providing for its implementation and for other purposes, under section 6b, states that: "PAGASA shall be responsible in the establishment, maintenance and operation of the National Standard for the second of time".
  • Presidential Decree 1149, assigning PAGASA as the official agency that will serve as the official time service agency of the Philippines.
  • Republic Act No. 10535, ‘The Philippine Standard Time (PhST) Act of 2013, requiring all national and local government offices to display the PhST on their official time devices, including bundy clocks, in accordance with the official time being provided by the PAGASA using its Network Time Protocol.

Functions of the Time Service Unit

  1. Maintains the national standard of time and frequency.
  2. Disseminates the precise time and frequency via Internet, radio broadcast and other means.
  3. Extends time synchronization and standardization services to industrial and scientific institutions.
  4. Exchanges data on time and frequency with overseas institutions.

For Philippine Standard Time (PhST):  Call Tel. No. (632) 929-1237

meteopilippinas

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

Weather Division is now  ISO 9001:2008 Certified
Proof has been furnished by means of an audit that the requirements of ISO 9001:2008 are met.

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PRESS RELEASE
24 May 2017

START OF SOUTHWEST MONSOON

Southwesterly windflow has been dominant over the West Philippine Sea for several days now. This is due to the formation of semi-permanent trough over Northern Luzon-Taiwan area and the eastward migration of the North Pacific High Pressure Area which are the prominent indicators of the southwest monsoon onset in the country. 

Likewise, the prevailing weather condition in most parts of Luzon and Visayas particularly the western section is now warm and humid as characterized by occasional to frequent occurrences of afternoon-evening or early morning rainshowers and thunderstorms. These developments signify the approaching onset of rainy season under Type 1 climate covering the western parts of Luzon and Visayas.


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DOST-PAGASA S&T Release

17 May 2017

To further strengthen its weather forecasting capabilities, the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA), in partnership with the Korea International Cooperation Agency (KOICA), inaugurates the new Communication, Ocean and Meteorological Satellite (COMS) Data Analysis System at the PAGASA Weather and Flood Forecasting Center in Quezon City.


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