, prompting the agency to upgrade Chan-hom to a severe tropical storm. On May 6, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) began issuing advisories on Chan-hom as it moved into their area of responsibility and assigned it the local Philippine name Emong. Within hours of PAGASA's first advisory, the JTWC assessed Chan-hom to have attained winds of 120 km/h (75 km/h), equivalent to a Category 1 hurricane on the Saffir–Simpson hurricane scale. The JMA followed suit six hours later, classifying the system as a minimal typhoon. Further intensification took place as the typhoon's outflow improved in response to a mid-latitude trough over central China. Several hours before making landfall along the western coast of Luzon on May 7, an eye-feature began to develop. Satellite imagery depicted a depression in the cloud cover over the center of circulation as well as a broken ring of deep convection. In light of this information, the JTWC assessed Chan-hom to have reached its peak intensity at this time, packing sustained winds of and an estimated barometric pressure of 956 mbar (hPa; ). However, the JMA stated that the typhoon was slightly weaker, having maximum winds of 120 km/h (75 km/h) and a pressure of 975 mbar (hPa; ). Just prior to crossing the coastline, the storm began to weaken as wind shear increased. Within hours of moving over the mountainous terrain of northern Luzon, the cyclone quickly diminished. The low-level circulation became detached from convection and pressure readings over land indicated a minimum pressure around 1004 mbar (hPa; ). Although wind shear remained at unfavorably high levels, Chan-hom maintained tropical storm intensity through its crossing of Luzon through the end of May 8. By May 9, all that remained of Chan-hom was an exposed low-level circulation with convection displaced over to the east. With the addition of dry air entering the system, the storm was not expected to regain strength as it began to take a northward turn. Around this time, PAGASA issued their final advisory on the system as they assessed it to have degenerated into a non-convective remnant low-pressure system. The JTWC issued their initial final advisory on Chan-hom during that morning; however, later analysis determined that the system remained a tropical depression until the morning of May 11. The JMA and JTWC continued to monitor the remnants of Chan-hom through May 13, at which time its low-level circulation