12 to less than 15 hours 6 019107 3 to less than 6 hours 3 019107 1 Less than 1 hour 0 019107 18 to less than 21 hours 8 019107 2 to less than 3 hours 2 019107 9 to less than 12 hours 5 019107 Missing value 15 019107 15 to less than 18 hours 7 019107 6 to less than 9 hours 4 019107 1 to less than 2 hours 1 019107 Time interval over which the movement of the tropical cyclone has been calculated 21 to less than 30 hours 9 019107 2014-09-03T09:54:35.695Z