 Late on February 9, the storm temporarily weakened when wind shear increased, though the next day it re-intensified as convection increased; a banding eye formed in the center of the convection, prompting the JTWC to re-upgrade Ivan to tropical cyclone status late on February 10.On February 11, the MFR upgraded Ivan to tropical cyclone status 1025 km (640 mi) northeast of Mauritus.By February 14, it had sped up and entered a more favourable environment, becoming a severe tropical storm.