Here's the 24-hour weather outlook for today, Sept. 21, from PAGASA:
Luzon
Cloudy skies with scattered rains and thunderstorms are likely in Metro Manila, Bataan, Zambales, Cavite, Batangas, Occidental Mindoro and northern Palawan including Cuyo Islands due to the southwest monsoon or Habagat.
The rest of Central and Southern Luzon will have mostly cloudy skies with isolated rains.
WEATHER EXPLAINERS:
What are Thunderstorms and Why Do They Happen in the Afternoons?
Habagat, Explained: Why They're Dangerous Like Typhoons
Visayas and Mindanao
Parts of Visayas will have isolated rains as early as morning while Mindanao will have generally fair weather with isolated rains and thunderstorms likely due to localized thunderstorms.