Tropical cyclone Giovanna was located in the Indian Ocean east-northeast of Madagascar when it was classified as a tropical storm on 9 Febuary 2012. The TRMM satellite image above shows Giovanna when it was rapidly becoming more powerful on 11 February 2012 at 1200 UTC. Giovanna had intensified to a category 3 tropical cyclone on the Saffir-Simpson scale with wind speeds estimated at 100 kts (~115 mph). This TRMM pass shows that an eyewall replacement was occurring at that time.
The TRMM satellite passed above a developing tropical cyclone in the South Indian Ocean designated as 12S on 9 February 2012 at 0402UTC. A rainfall analysis derived from TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) is shown overlaid on a visible/infrared image from TRMM's Visible and InfraRed Scanner (VIRS) instrument.
On 2 February 2012 at 1044 UTC the TRMM satellite again saw weakening tropical storm IGGY as it was approaching the coast of southwestern Australia. Data from TRMM's Microwave Imager (TMI) and Precipitation Radar (PR) instruments showed that bands of heavy rainfall measuring over 50mm/hr (~2 inches) were hitting coastal areas northwest of Perth, Australia. A red tropical storm symbol shows where Iggy's center was located.
At least 33 people were killed when tropical cyclone Thane with reported winds of up to 85 mph hit the southeastern coast of India Friday morning. The TRMM satellite saw the tropical cyclone several times from it's birth in the Bay of Bengal to it's strengthening to hurricane force before penetrating the Indian coast.