11:00 AM - 1:00 PM
[MIS09-P02] An observational study on the pre-monsoon heavy rainfall in the Metro Manila, Philippines based on a dense surface meteorological observation network
Keywords:Heavy rainfall , Thunderstorm, Metro Manila, Monsoon
To monitor heavy rainfall and thunderstorm activities in the Metro Manila, Philippines, an observational network of the automatic weather station with lightning detection sensors (P-POTEKA) has been installed since 2018. In this study, we investigated spatial and temporal characteristics of heavy rainfall and lightning activities in the Metro Manila during the pre-monsoon season (May-June) in 2019 based on the P-POTEKA surface meteorological data and the WWLLN (World Wide Lightning Location Network) lightning observation data.
In the 2019 pre-monsoon season, diurnal cycle of the heavy rainfall and lightning were predominant over the Metro Manila. The heavy rainfall and frequent lightning were observed mainly during 1600LT-2000LT. The peak time of the diurnal cycle tended to delay after the monsoon onset in the middle of June. Intraseasonal variations of rainfall and lightning frequencies were also predominant and the diurnal distribution patterns tended to vary day to day under the different monsoon wind conditions. One of the heavy rainfall events was observed in May 22, and the heavy rain and active thunderstorms were localized in the northern part of the Metro Manila. The dense surface meteorological observation data show the importance of local wind variations for inducing the heavy rainfall.
This work was supported by Japan Science and Technology Agency (JST) and Japan International Cooperation Agency (JICA) under the Science and Technology Research Partnership for Sustainable Development (SATREPS) Project.
In the 2019 pre-monsoon season, diurnal cycle of the heavy rainfall and lightning were predominant over the Metro Manila. The heavy rainfall and frequent lightning were observed mainly during 1600LT-2000LT. The peak time of the diurnal cycle tended to delay after the monsoon onset in the middle of June. Intraseasonal variations of rainfall and lightning frequencies were also predominant and the diurnal distribution patterns tended to vary day to day under the different monsoon wind conditions. One of the heavy rainfall events was observed in May 22, and the heavy rain and active thunderstorms were localized in the northern part of the Metro Manila. The dense surface meteorological observation data show the importance of local wind variations for inducing the heavy rainfall.
This work was supported by Japan Science and Technology Agency (JST) and Japan International Cooperation Agency (JICA) under the Science and Technology Research Partnership for Sustainable Development (SATREPS) Project.