Alison was a westerly moving tropical cyclone in the Indian Ocean and passed just north of Cocos Islands where gale-force winds were briefly registered. Alison reached category three intensity as it crossed 90°E and still developing when it moved into the Mauritius area of responsibility and was renamed Krisostoma.
For more details see the TC Alison Report (pdf)
Track and intensity
All times in WST - subtract 8 hours to convert to UTC.