Early on January 31 , RSMC Nadi reported that Yasi had intensified into a category two tropical cyclone , before reporting that it had become a severe tropical cyclone .
Yasi continued to intensify throughout that day , while affecting the Solomon Islands and Vanuatu .
Early on January 31 , RSMC Nadi reported that Yasi had intensified into a category two tropical cyclone , before reporting that Yasi had become a severe tropical cyclone .
Yasi continued to intensify throughout that day , while affecting the Solomon Islands and Vanuatu .