MANILA, Philippines – Three weather systems – the intertropical convergence zone (ITCZ), frontal system and localized thunderstorms – would be affecting the country over the next 24 hours, the national weather agency said on Monday.Weather specialist Veronica Torres of the Philippine Atmospheric Geophysical and Astronomical Services Administration (Pagasa), meanwhile, said that the low pressure area (formerly Tropical Storm ‘Caloy), which linger…