MANILA — Tropical Storm Maymay made landfall in the vicinity of Magsingal, Ilocos Sur early Thursday and is traversing Northern Luzon, prompting the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) to maintain Tropical Cyclone Wind Signals over parts of Northern Luzon. In its 5 a.m. bulletin, PAGASA said the center of Maymay was estimated…