Gale Warning
Issued at: ,
Gale Warning #

Gale Warning in PDF file

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


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
, 2019
FWFA:  N0. 19-144

Ten-Day Regional Agri-Weather Information
DEKAD NO. 15   MAY 21 - 31, 2019
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

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

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Renato R. Abcede

The purpose of this study is to apply the Gaussian Model in estimating relative air pollution concentration over the Metropolitan Manila arising from urban continuous point sources.
The computations were carried out using a fifteen meter effective height of all continuous point sources. The calculation of relative pollution concentrations at the ground and at the 15-meter level was made using a diffusion equation whose primary variables are thermal stability, the generalized diffusion coefficients, and wind speed and direction.
Prevailing wind speed and direction over the study area for each month were used in the computations. Average concentrations for each month over the domain represented by a system of 1-km grid squares for three different stability conditions (unstable, neutral and moderate inversion) were computed. Values were analyzed and isopleths of pollution concentrations were presented.

The results show that:

  • During the Northeast Monsoon, pollution concentrates in the Guadalupe (Makati), Bagong Ilog (Pasig), Ermita and Pandacan (Manila) and Baclaran (Rizal) areas.
  • During the Southwest Monsoon, pollution concentration concentrate in the Guadalupe, Bagong Ilog, Ermita and Pandacan, Baclaran and also in the Cubao and Balintawak (Quezon City) areas.
  • During the transition period from the Northeast to the Southwest monsoon seasons, pollutants were noted to be concentrated in the Guadalupe, Mandaluyong, Cubao and Quiapo areas.
  • Maximum concentration at the ground and at 15-meter level were observed to be relatively closer to the source in an unstable condition and relatively far downwind of the source in a stable condition.