The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) on Friday, Oct. 15, declared the end of the southwest monsoon or "habagat" season as it transitions to northeast monsoon or "amihan."
PAGASA Deputy Administrator Esperanza Cayanan cited recent analyses over the past few days showing that the southwest monsoon has significantly weakened.
In addition, Cayanan said that the strengthening of the high pressure area over mainland Asia and the expected northeasterly surge over Northern Luzon within the next five days confirms the gradual changing of the season.
"With these developments, the southwest monsoon season, locally known as 'habagat,' is now officially over," Cayanan said in a virtual press briefing.
This means that the season in the Philippines is now in the process of transition--manifested by more frequent afternoon or evening rain showers and thunderstorms--onto the gradual onset and progression of the northeast monsoon in the coming weeks.
Cayanan pointed out that the ongoing La Niña may enhance the northeast monsoon, which could trigger flooding and rain-induced landslides over vulnerable areas.
She advised concerned government agencies and the public to take precautionary measures to mitigate the potential impacts of these events.
PAGASA's Climate Monitoring and Prediction Section chief Ana Liza Solis said the amihan may start early this year, which usually occurs during the third or last week of October.
Amihan is associated with surges of cold weather that may last until February or March.