 With low vertical wind shear and excellent radial outflow, Hagupit consolidated further on 2 December and was upgraded to a severe tropical storm by the JMA and a typhoon by the JTWC at noon.Late on the same day, the JMA upgraded it to a typhoon when it began to track west-northwestward along the southern periphery of the subtropical ridge.Remaining in a favorable environment, Hagupit underwent rapid deepening in the afternoon on 3 December and as a result, the JTWC upgraded it to a super typhoon due to the system depicting a significant eye.