Dvorak technique
Cyclone Favio originated from a zone of disturbed weather that was first classified by the Météo-France office on Réunion (MFR) at 1200 UTC February 11, 2007. Twelve hours later, the Joint Typhoon Warning Center (JTWC) issued their first advisory on the system. Midday on February 12, MFR upgraded the system into a tropical disturbance and noted that its rating at that time on the Dvorak technique was 2.0.