Why does IBTrACS differ from HURDAT (or data from other agencies)?
First, all winds are reported as 10-minute winds. Data from NOAA (HURDAT, CPHC), JTWC and the RSMC New Delhi (IMD) all provide data as 1-minute. Winds were converted to 10-min using: V10 = 0.88 * V1 Second, IBTrACS is a compilation of data from all available agencies. So the number storms in IBTrACS will likely be larger than the number of storms from an individual agency. Third, since IBTrACS is a compilation of data from many agencies, the IBTrACS maximum sustained winds (MSW) is an average from all available agencies and will likely be different from the reports of each agency. Calculating statistics from IBTrACS (like ACE, number of super typhoons, etc.) will result in values which are more than likely different from those of any particular agency.
Related Questions
- In the Appendix C Demographics Chart, if agencies do not capture data on certain areas of the volunteers, staff, board, and clients, how do they reflect that?
- What type of software do we recommend agencies have to track and report on client-level data?
- Why does IBTrACS differ from HURDAT (or data from other agencies)?
