The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) declared the onset of the rainy season around the country today, May 18.
In an advisory, the weather department cited the widespread rain in the last 5 days as an indication of the start of the rainy season. It also noted that a southwesterly windflow has been recorded in recent days.
This condition according to PAGASA satisfies the criteria of the start of the rainy season over the western sections of Luzon and Visayas.
The advisory added that intermittent rains, associated with the Southwest (SW) monsoon will start to affect Metro Manila and the western sections of the country. However, breaks in rainfall events (also known as monsoon breaks), which can last for several days or weeks may still occur.
Meanwhile, the ongoing La Niña may still affect some parts of the country, according to PAGASA. This may increase the likelihood of above normal rainfall conditions in the coming months, it added.