MANILA— The trough of Typhoon Choi-Wan is expected to bring cloudy skies, scattered rains and thunderstorms over parts of the Visayas and Mindanao on Saturday, according to the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA). PAGASA said the weather disturbance will affect Mindanao, Western Visayas, the Negros Island Region, Central Visayas, Leyte and Southern…