 Around this time, Lorna deviated from its predominantly southwards motion, and assumed a track to the south-southeast.Due to the system being located on the very eastern edge of the South-West Indian Ocean basin during the previous two days, this slight easterly motion caused the cyclone to become centred directly over the 90th meridian east—the boundary of the Australian Bureau of Meteorology's area of responsibility.Lorna strengthened to peak intensity while tracking southwards along the boundary between the two regions, attaining ten-minute sustained winds of 150 km/h (90 mph) by 18