Anais formed as a tropical storm over the southern Indian Ocean on October 12, 2012, and strengthened into a tropical cyclone the next day. By October 15, 2012, the U.S. Navy’s Joint Typhoon Warning Center (JTWC) reported that Anais had maximum sustained winds of 100 knots (185 kilometers per hour) and gusts up to 125 knots (230 kilometers per hour). The storm was located about 540 nautical miles (1,000 kilometers) southwest of Diego Garcia.
Acquired April 5, 2010, this natural-color image shows Tropical Cyclone Robyn spanning hundreds of kilometers over the Southern Indian Ocean. Although the storm lacks a distinct eye, it has a discernible center marked by opaque white clouds.