An area of disturbed weather developed early on the December 12 north-northeast of Rodrigues.ftp://ftp.met.fsu.edu/pub/weather/tropical/Seychelles/2007121212-FMEE Later that day it was designated as Tropical Disturbance 04R. The Joint Typhoon Warning Center then issued a Tropical Cyclone Formation Alert on the developing system late on December 12. The JTWC issued its first warning on December 13, designating the storm as Tropical Cyclone 06S. Although the low level circulation center was exposed the system was upgraded to a tropical depression by Météo-France on December 14 due to a better low level circulation.ftp://ftp.met.fsu.edu/pub/weather/tropical/Seychelles/2007121406-FMEE Early on December 17 Mauritius Meteorological Service upgraded the system to a moderate tropical storm and named it "Celina" as it approaches Mauritius Island.ftp://ftp.met.fsu.edu/pub/weather/tropical/Seychelles/2007121706-FMEE
