 The PAGASA named the typhoon "Ruby" as it entered the Philippine Area of Responsibility early on 4 December.Simultaneously, Hagupit presented the very tightly curved and deep convective banding with a clear 35 km (25 mi) eye, which 1-minute maximum sustained winds reached 285 km/h (180 mph), equivalent to Category 5 of the Saffir–Simpson hurricane wind scale (SSHWS).The JTWC also forecast that Hagupit would become as strong as Typhoon Haiyan, but it failed to intensify further.