Ava is the first named cyclone of the 2017-18 South-West Indian Ocean cyclone season. It comes unusually late in a season which runs November 15 through April 30/May 15.
Showers produced by TC03S, now Ava, started across northern Madagascar late Tuesday, January 2 and intensified overnight Wednesday, reaching close to and over 200 mm (7.8 inches) in some places by Wednesday morning. Reunion and Mauritius saw first drops of rain around 09:00 UTC Tuesday and accumulated close to 100 mm (3.9 inches) in places over the next 24 hours.
This is a slow-moving cyclone with a potential to drop huge amounts of rain on Madagascar over the next couple of days, before and after landfall which is expected sometime around 09:00 UTC on January 5 in the vicinity of Toamasina (Madagascar is UTC+3).