------------------------------------------------------------------------------- Notice to Users of this Data ------------------------------------------------------------------------------- Last update: 20 April 2023 ------------------------------------------------------------------------------- NOTICE STATEMENT: ------------------------------------------------------------------------------- Posted April 20, 2023 -------------------- Posted final data, including b-decks, for all 2022 AL and EP storms. All ECMWF data and its derivatives in the a-decks are Copyright "© 2022 European Centre for Medium-Range Weather Forecasts (ECMWF)" Source www.ecmwf.int This data is published under a Creative Commons Attribution 4.0 International (CC BY 4.0). https://creativecommons.org/licenses/by/4.0/ ECMWF does not accept any liability whatsoever for any error or omission in the data, their availability, or for any loss or damage arising from their use. This material has been modified from the original. Posted December 22, 2022 ------------------------ Updated b-deck for ep062019 to include best track data from the central Pacific basin and uploaded missing a- and e-decks. Posted December 21, 2022 ------------------------ Updated a-deck for al112010 to remove duplicate entry for OFCI for DTG 2010091218. Posted September 22, 2022 ------------------------- Updated b-decks for the following storms to correct typos and account for reanalysis of the 1944 Great Atlantic Hurricane: al061941 al071944 al031952 al021964 al011966 al021966 al041966 al051966 al061966 al071966 al081966 al091966 al111966 al131966 al141967 al281969 al081970 al181970 al091988 al112003 Posted June 22, 2022 -------------------- Updated b-deck for al142021 to include missing 64-kt wind radii at 0000 UTC 14 September. Posted April 8, 2022 -------------------- Posted final data, including b-decks, for all 2021 AL and EP storms. All ECMWF data and its derivatives in the a-decks are Copyright "© 2022 European Centre for Medium-Range Weather Forecasts (ECMWF)" Source www.ecmwf.int This data is published under a Creative Commons Attribution 4.0 International (CC BY 4.0). https://creativecommons.org/licenses/by/4.0/ ECMWF does not accept any liability whatsoever for any error or omission in the data, their availability, or for any loss or damage arising from their use. This material has been modified from the original. Posted March 3, 2022 -------------------- Updated Atlantic basin b-decks for 1966-1970 to reflect reanalysis changes, including the addition of several new storms. Updated storm.table. Posted September 23, 2021 ------------------------- Updated a-deck for AL23202 to replace erroneous entries Posted June 10, 2021 -------------------- Posted final data, including b-decks, for all 2020 AL and EP storms. All ECMWF data and its derivatives in the a-decks are Copyright "© 2021 European Centre for Medium-Range Weather Forecasts (ECMWF)" Source www.ecmwf.int This data is published under a Creative Commons Attribution 4.0 International (CC BY 4.0). https://creativecommons.org/licenses/by/4.0/ ECMWF does not accept any liability whatsoever for any error or omission in the data, their availability, or for any loss or damage arising from their use. This material has been modified from the original. Posted February 12, 2021 ------------------------ Updated the b-deck for EP092014. Posted February 9, 2021 ----------------------- Updated the following b-decks to correct errors: bal011906 bal011928 bal011960 bal021963 bal011965 Posted December 3, 2020 ----------------------- Updated the following deck files to correct errors and complete records: bal062018 bep052016 aep052016 bep142016 aep142016 bep162018 aep162018 Posted August 12, 2020 ---------------------- Updated storm.table file. Posted May 1, 2020 ------------------ Posted updated b-decks for the following storms to fix errors: AL021865 AL051878 AL021880 AL061947 AL131999 AL141999 AL092011 Posted April 29, 2020 --------------------- Posted final decks for EP122019 (Akoni). Posted April 28, 2020 --------------------- Posted final data, including b-decks, for all 2019 AL and EP storms except for EP062019 (Erick) and EP122019 (Akoni), which are awaiting final best track information. For Erick, the final best track east of 140W has been posted in the archives, while the real-time track information west of 140W is still available in the real-time btk directory. The final best tracks for CP012018 (Walaka) and EP142018 (Lane) have also been posted. Posted January 11, 2020 ----------------------- Removed EP091961 (Simone) as part of the hurricane database reanalysis project. Posted December 16, 2019 ------------------------ Updated final f-deck for AL172017 (Ophelia) to correct errors. Updated all Atlantic b-decks from 1961-1965 to reflect reanalysis changes and updated storm.table for best-track changes. Posted November 1, 2019 ----------------------- Updated final b-decks for AL032004 (Charley) and AL122008 (Laura) to correct wind radii errors. Posted August 8, 2019 --------------------- Posted final b-decks for EP102018 (Hector) and EP152018 (Miriam), including final best track information from CPHC and JTWC for EP10 and CPHC for EP15. Posted May 29, 2019 ------------------- Posted final decks for CP012016 (Pali). Posted May 13, 2019 ------------------- Posted final data, including b-decks, for all 2018 AL and EP storms except for EP0102018 (Hector), EP142018 (Lane), EP152018 (Miriam), and EP162018 (Norman), which are pending receipt of final best track information from CPHC. For these systems, the final best track east of 140W has been posted in the archives, while the real-time track information west of 140W is still available in the real-time btk directory. Posted February 28, 2019 ------------------------ Updated b-deck and f-deck for Fernanda (EP062017) after receipt of final best track data from CPHC. Posted February 14, 2019 ------------------------ Updated b-decks for EP142017 (Lidia) and AL172017 (Ophelia) to correct erroneous data. Posted January 28, 2019 ----------------------- Posted corrected b-deck for CP032009 (Neki). Posted November 14, 2018 ------------------------ Posted final decks for CP032015 (Kilo). Posted August 22, 2018 ---------------------- Posted final decks for EP122015 (Ignacio) after receipt of final best track info from CPHC. Posted August 14, 2018 ---------------------- Posted corrected b-deck for AL021899 to correct erroneous lat/lon at 1000 UTC 30 July 1899. Posted August 3, 2018 --------------------- Posted final decks for EP132016 (Lester) including final best track information from CPHC. Posted July 25, 2018 -------------------- Posted corrected b-deck for AL131995 that is consistent with post analysis published in NHC Preliminary Report (currently known as a Tropical Cyclone Report). Posted July 9, 2018 ------------------- Posted complete a-deck for EP112006 to replace nearly empty old a-deck. Posted May 11, 2018 ------------------- Posted new b-decks for storms listed below to correct typos in best track data: AL081861 AL061889 AL031952 AL131954 AL031955 AL031988 AL051989 AL091993 AL091998 AL092004 Posted April 25, 2018 --------------------- Finalized all 2017 AL and EP storm information, including best tracks, except for EP062017 (Fernanda), which is pending receipt of final best track information from CPHC. For this system, the final best track east of 140W has been posted in the archives, while the real-time track information west of 140W is still available in the real-time btk directory. The final best track data for CP022015 (Iune) has also been posted. Posted January 8, 2018 ---------------------- Posted final decks for CP042015. Posted October 30, 2017 ----------------------- Posted final decks for CP082015. Posted April 26, 2017 --------------------- Posted new b-decks for the storms listed below to fix spacing within the files, however no changes were made to best track infromation. AL101995 AL131995 AL131996 AL131998 AL131999 Posted April 7, 2017 -------------------- Posted final decks for EP040215 (Ela). Posted April 5, 2017 -------------------- Finalized all 2016 AL and EP information, including best tracks, except for EP052016 (Darby), EP132016 (Lester), and EP142016 (Madeline), which are pending the receipt of final best track information from CPHC. For these three systems, the final best track east of 140W has been posted in the archives, while the real-time track information west of 140W is still available in the real-time btk directory. The final best track data for CP012016 has also been posted. Note that final best tracks for the five 2015 CP systems (CP01, 02, 03, 04, and 08) have not yet been completed. These systems will be pushed into the archives when final best tracks from CPHC are available. A special note about the files for Otto, which is listed as both AL16 and EP22. The best track and fix files contain the complete history of the storm in both sets of files. The a- and e-decks, however, only contain forecast information for times when Otto was located in their respective basins. For example, the a-deck for AL16 contains model tracks for all times prior to 06Z on 25 November, when Otto moved into the EP basin. Posted March 22, 2017 --------------------- Posted updated f-decks to correct several typos and errors for the following storms: AL051995 AL132010 AL092012 AL062014 Posted November 17, 2016 ------------------------ Posted final decks for TD Nine-C (CP092015). Posted October 11, 2016 ----------------------- Posted final decks for Oho (CP072015). Posted October 4, 2016 ---------------------- Posted final decks for Malia (CP052015). Posted July 23, 2016 -------------------- Posted final decks for Niala (CP062015). Also updated b-decks for 1956- 1960 AL systems to reflect reanalysis changes, including addition of several new storms. Updated storm.table. Posted July 22, 2016 -------------------- Fixed minor formatting errors in f-deck for AL052006. Posted June 3, 2016 ------------------- Updated nhc_techlist.dat file in docs. Posted May 3, 2016 ------------------ Posted final decks for Genevieve (EP072014) and updated storm.table. Posted February 26, 2016 ------------------------ Posted updates to numerous east Pacific b-decks to fix errors, include non-synoptic landfall points, and include all non-developing tropical depressions from 1988. EP141988 through EP201988 EP031989 EP211989 EP211990 EP201992 EP101995 EP051996 EP091996 EP101996 EP011997 EP161997 EP191997 EP121999 EP162000 EP192000 EP142013 Posted February 19, 2016 ------------------------ Finalized all 2015 AL and EP information, including best tracks, except for EP042015 (Ela) and EP122015 (Ignacio) which are pending the receipt of final best track information from CPHC. The working best track data for EP042015 are still available in the real time directory. For EP122015, the final best track east of 140W has been posted in the archives and the real-time track information west of 140W is still available in the real-time directory. The final best track data for the 9 2015 CP storms are not yet available, so the real-time data for those storms remain in the real time directories. Posted February 16, 2016 ------------------------ Posted updated b-deck for EP121959 based on reanalysis. Posted February 12, 2016 ------------------------ Posted final decks for EP092014 and EP102014. Posted December 21, 2015 ------------------------ Corrected error in system status in b-deck for AL032005. Posted November 9, 2015 ----------------------- Corrected dates/times in storm.table file for AL111926 and AL041974. Posted July 21, 2015 -------------------- Updated a-deck for AL172011 to remove extraneous model data before system formed. Posted July 7, 2015 ------------------- Posted final decks, including best tracks, for CP012014 and CP022014. Posted June 25, 2015 -------------------- Updated a-deck for EP112014 to remove extraneous model data before system formed. Posted June 11, 2015 -------------------- Updated b-deck for AL011952 to correct status on first day of system's life to "LO". Posted June 2, 2015 ------------------- Corrected errors in f-deck for EP182014. Posted May 26, 2015 ------------------- Updated b-decks for 1951-1955 AL systems to reflect reanalysis changes, including renumbering of storms. Also, a-decks for 1954-1955 were updated to reflect renumbering. Also updated the following AL b-decks to correct errors: AL021876 AL031938 AL011941 AL151949 AL031974 AL041974 AL051974 Also updated storm.table in archives for best-track changes. Posted April 24, 2015 --------------------- Updated f-decks for 2006 Atlantic systems to clean up AMSU fixes being stored in the wrong storm's f-deck. Posted April 21, 2015 --------------------- Updated b-deck and f-deck for al012014 for best track and fix changes. Posted March 9, 2015 -------------------- Finalized all 2014 AL and EP information, including best tracks, except for EP072014, EP092014, and EP102014. The final best track of these storms in the archives section ends at 140W pending receipt of final best track information from CPHC and JTWC. The working best track data from these storms is still available in the real time directories. Posted June 30, 2014 -------------------- Finalized all 2013 CP storms, including best tracks. Posted June 22, 2014 -------------------- -Updated a-deck for al022013 to remove extraneous OCD5 entires. -Updated a-deck for ep092013 to include missing OCD5 entries. Posted June 8, 2014 ------------------- Updated numerous AL b-decks as described below: -Added non-developing TDs for 1988 (bal131988.dat through bal191988.dat), which were previously missing. -Added multiple asynoptic landfall/intensity points for 1983 to 2011, which were not in the b-decks. -Fixed typographic errors in b-decks for al011928, al071934, al071944, and al191974. Also updated storm.table in archives for best-track changes. Posted May 28, 2014 ------------------- To prevent the release of pre-decisional information, ATCF data on the NHC public FTP server will not update during a 90-minute blackout period prior to the nominal advisory release times (0300, 0900, 1500, and 2100Z). At the advisory release times, all data will be updated. In addition, the /tcweb directory, which was previously used to facilitate communications between NHC and the U.S. Navy, has been removed from the NHC public FTP server. Posted April 23, 2014 --------------------- Fixed typo in b-deck for AL071916. Posted April 10, 2014 --------------------- Updated all AL b-decks from 1946-1950 to reflect reanalysis changes. Updated b-deck for AL091969 (Camille) to reflect reanalysis changes. Updated storm.table in archives for best-track changes. Posted March 12, 2014 --------------------- Finalized all 2013 EP and AL data, including best tracks. Posted November 29, 2013 ------------------------ Updated the following AL b-decks to include landfall entries: AL051855 AL021998 AL081999 AL131999 AL112000 AL042008 Posted June 10, 2013 -------------------- Updated storm.table in archives for best-track changes. Posted June 9, 2013 ------------------- Updated all AL b-decks from 1941-1945 to reflect reanalysis changes. Updated the following b-decks to correct minor typos: AL051897 AL131936 AL061938 AL021940 AL011969 AL191974 AL181975 AL071998 Posted May 18, 2013 ---------------------- Updated nhc_techlist.dat in /docs directory. Posted April 5, 2013 ----------------------- Updated b-decks for the following storms to correct errors: CP011963 CP011990 CP012009 EP051962 EP071976 EP081976 EP101978 EP131978 EP142003 Posted April 4, 2013 ----------------------- Updated storm.table in archives for best-track changes. Posted March 12, 2013 ----------------------- Corrected b-deck for ep041989 to remove erroneous 35-kt intensity. Updated storm.table for 2012 TCs. Posted March 8, 2013 ------------------------ Finalized all 2012 data, including best tracks. Posted February 15, 2013 ------------------------ Made numerous changes to fix errors and typos in several archived decks. Also updated b-decks to reflect reanalysis changes for 1931-1940. Fixed duplicate storm entry for AL231969, which results in a renumbering of all systems for that year - storms that were AL24-AL301969 are now AL23-AL291969. Corrected storm.table master list in archvie area to reflect the change in storm IDs for 1969. Posted as of Jun 5, 2012 ------------------------ Corrected storm.table master list in archives area with proper storm IDs for 1899 Posted as of May 21, 2012 ------------------------- Updated storm.table in archives area to add in missing AL062011 "Franklin" record Posted as of Mar 15, 2012 ------------------------- Corrections made to best track infomration for 1901 (2) and 1906 (1) Posted as of Mar 9, 2012 ------------------------ Finalized all 2011 data, including best tracks. Also added new reanlysis datasets for the time period covering 1857-1930 - plus higher temporal resolution posits for significant event times or landfalls. Corrected a few misc. data files as well. Posted as of Jun 10, 2011 ------------------------- Updated/corrected documention for tracker/guidance changes for 2011 Hurricane Season Posted as of Jun 8, 2011 ------------------------ Added new documention for tracker/guidance changes for 2011 Hurricane Season see the docs/ directory Posted as of May 13, 2011 ------------------------- Corrected AL0419938 "UNNAMED" best track data. Posted as of Apr 14, 2011 ------------------------- Corrected AL132011 "KARL" to include landfall points and intensity information. Posted as of Feb 18, 2011 ------------------------- Finalized all 2010 data, including best tracks. Also added new reanlysis datasets for the time period covering 1851-1930 - plus higher temporal resolution posits for significant event times or landfalls. Posted as of Feb 3, 2011 ------------------------ Added JOHN (EP112006) A-deck/B-deck to database that was missing previously. Posted as of Nov 24, 2010 ------------------------- Added missing model guidance to FELICIA (AL082009) for information beyond 140W. Posted as of Oct 21, 2010 ------------------------- Added extra TC fix inforamtion for the follow years: 2005, 2006, 2007 and 2008. See the "archive/" sub-directory README file for more information. Posted as of Oct 15, 2010 ------------------------- Updated best track data, includes adding higher temporal resolution information. See the "archive/" sub-directory README file for more information. Posted as of Jun 7, 2010 ------------------------- Updated storm.table (master TC list) on the archive area. Posted as of Mar 5, 2010 ------------------------- Updated EP122009 "Ignacio" best track to include remnant low positions that were missing prior to the last update. Updated AL022009 "ANA" to remove erronous entry in the best track - ammended to have first entry start on 10/0600. Posted as of Feb 17, 2010 ------------------------- Posted final East Pacific Basin data after post analysis was preformed. Posted as of Jan 28, 2010 ------------------------- Posted final Atlantic Basin data after post analysis was preformed. Posted as of Oct 22, 2009 ------------------------- Updated best track data in the archive/ directory, see the README file in the archive/ directory for list of changes/revisions. Posted as of Jun 19, 2009 ------------------------- Updated best track data in the archive/ directory, see the README file in the archive/ directory for list of changes/revisions. Posted as of May 18, 2009 ------------------------- The README file was updated to included new links and updated content. Also, all users should note that any undocumented content such as guidance or objective aids should *not* be used. No changes are expected in terms of the tracker guidance for the 2009 season. new updates: gpce/ - Guidance confidence decks, commonly referred to as E-decks or error decks. gis/ - Experimental GIS shapefiles (best tracks and some forecast related paramters) docs/ - new location of tracker documentation (no changes expected for 2009). Posted as of Feb 19, 2009 ------------------------- Posted final decks from 2008 season for both Atlantic, East Pacific and Central Pacific basins. See "archive/" directory for details and data. The entries in the "storm.table" master file will shortly be updated with the highest development level attained and with the end date of the system as noted in the best track record. In addition, the best track for 2008 in ESRI Shapefile format specification. These data are considered "beta" or "experimental" at this time and are located in the "gis/btk/" subdirectory. Posted as of Aug 14, 2008 ------------------------- Corrections to the historical ATCF best track data were made, please see "archive/README" for details. Posted as of Apr 18, 2008 ------------------------- Name changes have been made to the track and intensity consensus models. The new name changes of these techniques or objective aids are defined in the PDF document called "tracker-changes-2008_v1.pdf" Please note that NHC and CPHC will continue to produce fixed consensus models (all members required) and variable consensus models (not all members need be present). In addition, all objective aids are now listed in one of the folowing techlist data files: nhc_techlist.dat "operationally used objective aids (guidance)" nhc_techlist.dat.all "all known objective aids (guidance), including historical" nhc_techlist.dat.deprecated "retired or objective aids (guidance) no longer in use" nhc_techlist.dat.ensemble "ensemble objective aids (guidance)" nhc_techlist.dat.experimental "experimental objective aids (guidance)" Note - The objective aids are "guidance" derived from various types of models or techniques and can potentially be subject to large errors. Always consult "official" forecast products and follow instructions from the emergency management community for decisions concerning tropical cyclone activity. Posted as of Mar 31, 2008 ------------------------- All realtime data and archive storm data is available at the following source: == NCEP ftp Clusters == ftp://ftp.tpc.ncep.noaa.gov/atcf == NOAA Web Ops Center "WOC" high bandwidth ftp Clusters == ftp://ftp.nhc.noaa.gov/atcf All data is mirrored directly from NHC as it is received with lag times less than a few minutes. Posted as of Mar 26, 2008 ------------------------- Corrected the atlanic gudiance decks for 2006 which has some erroneous objective aid data in the "AL" A-decks Posted as of Jan 31, 2008 ------------------------- Final '07 season best track, guidance and fix information has been posted. Additional guidance (OCD5 and BCD5) has been merged into the the A-decks. Data is avalaible in the real-time data sub-directories and is also in compressed form in the archived area. Posted as of Jan 09, 2008 ------------------------- Updated ATCF guidance decks (aka A-decks) to include guidance from inland decay model applied to OFCL forecast information "OCD5" for 2007 season (AL and EP basins). Data added post season using non-operational development code. Posted as of Sep 17, 2007 ------------------------- Updated ATCF Archive datasets to include EP/CP reanalysis information from the HURDAT and corrected data problems for several AL systems - see README file in ARCHIVE section. Posted as of Aug 23, 2007 ------------------------- Updated README file with new links, also made note of proper sub-directory which contains the latest OFCL in A-deck format this is noted by the May 17, 2007 post. Posted as of May 17, 2007 ------------------------- Model / guidance technames updated in file called "techlist.dat" Refer to model statistics at the following URL for information concerning verification metrics of each model techname: http://www.nhc.noaa.gov/verification/index.shtml Forecast files that only contain the OFCL forecast (files endng with extension ".fst") will be posted in the "afst/" sub-directory at the send time of the official forecast advisory. Posted as of Feb 28, 2007 ------------------------- FTP Access to ATCF data is now available from NCEP high-speed/high availablity public ftp servers. This will provide public users with more reliable and faster access. The new Anonymous ftp service for ATCF data is now available at "ftp.tpc.ncep.noaa.gov/atcf" FTP ATCF access from the NHC anonymous ftp servers will be discontinued on June 1, 2007. This means that ATCF data will no longer be available from "ftp.nhc.noaa.gov/pub/atcf" Posted as of Feb 15, 2007 ------------------------- JOHN EP12000 best track correction for incorrect date-time group. Posted as of Feb 14, 2007 ------------------------- NHC has re-posted the 2006 A-decks with corrections, so please re-pull the A-decks. All ETA related guidance was renamed to NAM and all AL022006 and above AL system A-deck guidance was corrected for a data merge end of season problem. At this time, please note that all AL, EP and CP systems except CP012006 "IOKE" have been finalized. CP012006 "IOKE" has posted; however, the intensity and mslp values are still under reanalysis and revision by DOD and CPHC. The IOKE best track data is still considered very preliminary. Once the post-storm analysis is complete, IOKE's data will be updated to this site. Posted as of Jan 22, 2007 ------------------------- Corrected best track intensity of Wilma AL252005 - date/time is 2005102412 Incorrect itnensity listed as 100 kts, corrected to 95 kts which is consistent with Wilma Final TCR report. Posted as of Jan 18, 2007 ------------------------- All 2006 season best tracks have been finalized. Data resides in the archive/ subdirectory. At this time, all AL, EP and CP systems except CP012006 "IOKE" have been finalized. CP012006 "IOKE" will post soon once DOD has finalized the WP basin portion of the track. Posted as of Dec 20, 2006 ------------------------- For the 2006 AL basin, an "UNNAMED" Tropical Storm will be added to the ATCF database as a result of further re-anaylsis. This data will be posted shortly. Posted as of Jul 18, 2006 ------------------------- "techlist.dat" updated to include SHIPS parallel intensity model (experimental). As per the Apr 13, 2006 posting, all guidance not listed in the "techlist.dat" is either experimental, legacy or unknown to NHC. Any model listed as experimental is *not* to be used for forecasting purposes and is *not* to be used for emergency planning purposes for obvious reasons. Likewise, models listed as "do not use" must be discarded. Posted as of Jun 22, 2006 ------------------------- See "techlist.dat" for updated GEFS (GFS ENSEMBLE) members. Posted as of Apr 21, 2006 ------------------------- See "archive/2005/" subdirectory for the latest 2005 ATCF data which includes the addition of an UNNAMED Subtropical Storm merged into the database after detailed post-season analysis. Posted as of Apr 13, 2006 ------------------------- See "techlist.dat" for latest additions and changes to the list of vortex tracking models used in the A-deck guidance files. Models found in the A-deck but unlisted in the "techlist.dat" are generally either experimental or legacy. Only use models described in the "techlist.dat" file. Posted as of Jan 10, 2006 ------------------------- Commencing Feb 3, 2006 - all ATCF a-decks located in the subdirectory "aid_public/" will be compressed in order to better serve our users. At this time, the GNU Zip utility will be used as the compression method and files that are compressed with this utility will have the ".gz" extension. see --> http://www.gzip.org for more information and for compresson / uncompression utilities. Posted as of Jan 10, 2006 ------------------------- Commencing Feb 3, 2006 - The SHIPS detailed diagnostic model output runs will be placed in the "stext/" subdirectory. This output was originally posted at a different location on the NHC public ftp server during the '04 and '05 Atlantic hurricane seasons. Post time for this data is greatly improved to about 5 minutes after the model has completed running. ------------------------------------------------------------------------------- NATIONAL HURRICANE CENTER POINT OF CONTACT: ------------------------------------------------------------------------------- Dr. Michael J. Brennan Senior Hurricane Specialist NWS National Hurricane Center 11691 SW 17th Street Miami, FL 33178 e-mail: michael.j.brennan@noaa.gov