The current speeds at this area are quite weak, the maximum current speed is 0.28 ms1 occurring at 19UTC on November 3 which is the time before the typhoon landfalls. At the time of peak elevation, 08UTC on November 4, the current speed at Cha-Am is only 0.21 ms1, but the strong speed occur at the area around Cha-Am. That means the peak surge is not generated by the speed at that point, but it influenced by the strong speed around the peak area.