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Link to the Reanalysis Data

The Atlantic Hurricane Database Re-analysis Project is an effort to extend and revise the National Hurricane Center's North Atlantic hurricane database (or HURDAT). Going back to 1851 and revisiting storms in more recent years, information on tropical cyclones is revised using an enhanced collection of historical meteorological data in the context of today's scientific understanding of hurricanes and analysis techniques.

To receive email updates about progress in the Atlantic Hurricane Re-analysis Project, send an email to Chris Landsea.


What's New

December 2019 - The Northeast and North Central Pacific hurricane database (HURDAT2) was revised on 26 December 2019 to include the removal of Tropical Storm Simone in 1961.

November 2019 - The 1961 to 1965 Atlantic hurricane seasons have been reanalyzed. Revisions to the hurricane database were accomplished by obtaining the original observations collected - mainly by ships, weather stations, the Hurricane Hunter Navy, Air Force, and Environmental Science Services Administration (ESSA) aircraft reconnaissance planes, and the earliest available satellite images - and assessing the storms based upon our understanding of hurricanes today. The reanalysis also allowed "discovering" of tropical storms and hurricanes that occurred, but were not yet officially recognized as such in the official records. Nine new tropical storms and hurricanes during these five years were discovered and added to the database. Six hurricanes were identified as impacting the United States, one less than originally identified. The hurricane with the worst impact for the United States during these seasons was Betsy in 1965, which killed 75 people in Florida and Louisiana and was the first ever billion dollar hurricane for U.S. damage.  Betsy was upgraded to a Category 4 from a Category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale at landfall in Louisiana, as it is reassessed that it had maximum sustained surface winds of 115 kt (130 mph) and a central pressure of 946 mb. Sandy Delgado, Brenden Moses, Andrew Hagen, Chris Landsea, and the Best Track Change Committee all made substantial contributions toward the reanalysis of these hurricane seasons."

July 2019 - The Northeast and North Central Pacific HURDAT2 has been updated with 2018 hurricane season data.

June 2019 - The 2018 Best Tracks for the Atlantic basin has been added into the HURDAT2 database.

Dec 2018 - Two new articles

May 2018 - The 2017 best tracks for the Atlantic basin and the Northeast Pacific basin have been added into the HURDAT2 database. Note: Tbe following storms that formed within the Central Pacific Hurricane Center's area of responsibility are operational estimates and have not yet been post-storm analyzed:

  • Halola (CP012015)
  • Kilo (CP032015)
  • Loke (CP042015)
  • Pali (CP012016)
  • Darby (EP052016)
  • Madeline (EP142016)
  • Fernanda (EP062017)

The final best tracks for these systems will be updated when they become available.

May 2018 - A paper documenting the methodology, datasets, and results fromt the 1954 to 1963 Atlantic hurricane seas reanalysis has been published in the Journal of Climate.

April 2017 - The 2016 best tracks for the Atlantic basin and the Northeast Pacific basin have been added into the HURDAT2 database. Note: storms that formed within the Central Pacific Hurricane Center's area of responsibility are not included in this update.

Archive of What's New


  1. Re-analysis results:
    1. Documentation for 1851 to 1910
    2. Documentation for 1911 to 1920
    3. Documentation for 1921 to 1930
    4. Documentation for 1931 to 1943
    5. Documentation for 1944 to 1953
    6. Documentation for 1954 to 1963
    7. Data
  2. How to submit changes to the HURDAT
  3. Hurricane Andrew's Upgrade
  4. U.S. Hurricane History by State (NWS sites)
  5. HURDAT Reanalysis Related Publications
  6. Publications of Chris Landsea
picture from Florida's Hurricane History
Picture from: "Florida's Hurricane History", by Jay Barnes
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