MANILA— The trough of Severe Tropical Storm Choi-Wan is bringing cloudy skies, rains and thunderstorms over parts of the Visayas and Mindanao, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said Friday. In its 24-hour public weather forecast issued at 4 a.m. on Oct. 2, PAGASA said Mindanao, Western Visayas, the Negros Island Region,…