The National Hurricane Center (NHC) maintains a climatology of all Atlantic tropical cyclones since 1851, called HURDAT. For each storm, HURDAT contains estimates of the latitude, longitude, 1-minute maximum sustained surface winds, minimum sea-level pressure, and an indicator of whether the system was purely tropical, subtropical or extra-tropical at 6-hour intervals. A limitation of HURDAT is its lack of any information about storm structure. The “extended” best track file was created by supplementing HURDAT with additional storm parameters determined by NHC. The additional parameters include the following:
These datasets were designed for easy importation into spreadsheets. The original development of the Extended Best Track datasets was supported by the Risk Prediction Initiative in Bermuda and continued support is provided by the NESDIS Center for Satellite Applications and Research (StAR). The dataset files below are routinely updated with data from the previous year between February and March, after NHC finalizes the best track data. The additional wind structure parameters are estimated in real time during the NHC forecast process. Starting in 2003 the National Hurricane Center produces post-storm best track estimates of the wind radii. The Extended Best Track includes best track radii from 2003 and later and operational radii estimates from 2003 and earlier.
Left click links below to display files in your browser window.
Right click links below, click “save as” to download the files.
Extended Best Track Dataset Files (01/02/2020)
Extended Best Track Dataset Documentation Files (01/02/2020)
This documentation file describes the format and units of the datasets.
Demuth, J., M. DeMaria, and J.A. Knaff, 2006: Improvement of advanced microwave sounder unit tropical cyclone intensity and size estimation algorithms. J. Appl. Meteor., 45, 1573-1581.