On January 18, an elongated, poorly organized area of convection associated with the remnants of Tropical Storm Emang lingered near the ITCZ. By January 24, RSMC La Réunion reported a totally exposed vortex with occasional burst of convection persisted about NNE of Rodrigues, and SW of Diego Garcia. At that time it was not expected to strengthen, but early on 26 January, convective activity improved, with deep convection and redeveloped a well defined, partially exposed low level circulation center due to moderate vertical wind shear from the East, and was designated as a Tropical Depression.https://www.webcitation.org/6DxGvEy81?url=http://gwydir.demon.co.uk/advisories/ABIO10-PGTW_201301251800.htm It continued to strengthen as it moved west, then south-west as it steadily intensified, reaching Intense Tropical Cyclone strength on 30 January while developing a well defined eye, with a deep, intense ring of convective banding forming in the eyewall. On January 31 the eye became less well defined, and started to collapse.https://www.webcitation.org/6E5IPA5zn?url=http://gwydir.demon.co.uk/advisories/WTIO30-FMEE_201301301239.htm On February 1 the system started to become elongated, and weakened into a severe tropical storm as it began its extratropical transition.https://www.webcitation.org/6E7wIUYNc?url=http://gwydir.demon.co.uk/advisories/WTIO30-FMEE_201302020044.htm By February 3, Felleng became fully extratropical, with the low level circulation center becoming totally exposed and elongated, under vertical wind shear, located to the west of the remnant convection.https://www.webcitation.org/6EAwtZTlK?url=http://gwydir.demon.co.uk/advisories/WTIO22-FMEE_201302031216.htm
