sentences:  Tracking southwest, Kamba quickly intensified into a severe tropical storm at 1200 UTC on March 9 as winds increased to 95 km/h (60 mph 10-minute winds).Not long after being upgraded to a severe tropical storm, the JTWC estimated that Kamba had strengthened into the equivalent of a Category 1 hurricane with winds of 120 km/h (75 mph).Early on March 10, Kamba began to undergo rapid intensification and Météo-France upgraded the storm to a tropical cyclone as an eye developed.