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This is the IBTrACS Questions and Answers forum. Users of IBTrACS can ask questions here.
The easiest way to post is to send your question in an email to: ibtracs-qa [at]
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If you are asking questions about IBTrACS, please also join the
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Mahendra Benke
,
Jennifer Gahtan - NOAA Federal
2
Jul 15
Converting 3 min wind speed to 1 min
Hi- None of the maximum wind speeds in IBTrACS are converted between wind averaging periods but are
unread,
Converting 3 min wind speed to 1 min
Hi- None of the maximum wind speeds in IBTrACS are converted between wind averaging periods but are
Jul 15
Michael Morrone
,
Ken Knapp - NOAA Federal
4
Jul 9
503 error on IBTracs site
Hi Ken, While the link is working, the data itself was last updated on 7/2. Thank you for your help!
unread,
503 error on IBTracs site
Hi Ken, While the link is working, the data itself was last updated on 7/2. Thank you for your help!
Jul 9
Michael Dezube
,
Ken Knapp - NOAA Federal
5
Jul 8
NOAA's BigQuery Hurricane Table Seems to No Longer be Updated
The latest documentation is at our website: https://www.ncei.noaa.gov/products/international-best-
unread,
NOAA's BigQuery Hurricane Table Seems to No Longer be Updated
The latest documentation is at our website: https://www.ncei.noaa.gov/products/international-best-
Jul 8
wenyu
,
Jennifer Gahtan - NOAA Federal
4
Jun 21
missing wmo_wind since 2023
Hi Wenyu, The wmo_wind contains wind data from different agencies based on the official RSMCs
unread,
missing wmo_wind since 2023
Hi Wenyu, The wmo_wind contains wind data from different agencies based on the official RSMCs
Jun 21
Michael Morrone
,
Jennifer Gahtan - NOAA Federal
6
Jun 11
Status of IBTracs data access
Hi Jennifer, Noted! Thanks for the quick reply. Best, Mike From: Jennifer Gahtan - NOAA Federal <
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Status of IBTracs data access
Hi Jennifer, Noted! Thanks for the quick reply. Best, Mike From: Jennifer Gahtan - NOAA Federal <
Jun 11
Paolo De Luca
,
Ken Knapp - NOAA Federal
3
May 30
Question on time-steps of tracks
Hi Paolo You can use the coordinate variable 'time' to calculate the time of the observation.
unread,
Question on time-steps of tracks
Hi Paolo You can use the coordinate variable 'time' to calculate the time of the observation.
May 30
guiling ye
,
Jennifer Gahtan - NOAA Federal
2
May 29
TC minimum pressure
Hello Guiling Ye, Since IBTrACS includes data from many sources, the start year for minimum central
unread,
TC minimum pressure
Hello Guiling Ye, Since IBTrACS includes data from many sources, the start year for minimum central
May 29
羅倫素
,
Jennifer Gahtan - NOAA Federal
2
May 13
WPAC Basin Best Track Data from 2022-2023
Hi-Apologies for the delay. The best track data will be in IBTrACS soon with the release of our new
unread,
WPAC Basin Best Track Data from 2022-2023
Hi-Apologies for the delay. The best track data will be in IBTrACS soon with the release of our new
May 13
Somnath Pal
,
Jennifer Gahtan - NOAA Federal
2
May 2
Inquiry regarding missing storms
Hi Somnath, IBTrACS is a database for tropical cyclones, so extratropical cyclones will not get
unread,
Inquiry regarding missing storms
Hi Somnath, IBTrACS is a database for tropical cyclones, so extratropical cyclones will not get
May 2
大野 悠斗521313
,
Jennifer Gahtan - NOAA Federal
3
May 1
Typhoon TRIX in 1952
---------- 転送メッセージ --------- From: 大野 悠斗521313 <521...@m.mie-u.ac.jp> 日付: 2024年5月2日(木) 9:35 件名:
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Typhoon TRIX in 1952
---------- 転送メッセージ --------- From: 大野 悠斗521313 <521...@m.mie-u.ac.jp> 日付: 2024年5月2日(木) 9:35 件名:
May 1
Dek Ina
,
Jennifer Gahtan - NOAA Federal
3
Apr 30
Different report in 2024 and 2021
I see. Thank you! Pada Senin, 01 April 2024 pukul 22.28.39 UTC+7 Jennifer Gahtan - NOAA Federal
unread,
Different report in 2024 and 2021
I see. Thank you! Pada Senin, 01 April 2024 pukul 22.28.39 UTC+7 Jennifer Gahtan - NOAA Federal
Apr 30
Thano
,
Ken Knapp - NOAA Federal
2
Apr 24
its doubt about data
Hi Thanks for your interest in IBTrACS data. IBTrACS is solely for position and intensity of tropical
unread,
its doubt about data
Hi Thanks for your interest in IBTrACS data. IBTrACS is solely for position and intensity of tropical
Apr 24
Michael Morrone
,
Jennifer Gahtan - NOAA Federal
2
Mar 29
Typo in SLP for 1997216N20091?
Hi Mike, Thanks for bringing this to our attention-we'll look into it further. -Jennifer On Fri,
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Typo in SLP for 1997216N20091?
Hi Mike, Thanks for bringing this to our attention-we'll look into it further. -Jennifer On Fri,
Mar 29
Dek Ina
,
Jennifer Gahtan - NOAA Federal
2
Mar 29
Wind Speed in IBTrACS
It depends on which source data you want to use and your use case. The WMO_WIND option will give wind
unread,
Wind Speed in IBTrACS
It depends on which source data you want to use and your use case. The WMO_WIND option will give wind
Mar 29
Michael Morrone
,
Jennifer Gahtan - NOAA Federal
6
Mar 20
Track-type Designation of Madge (1973)
Hi Jennifer, Thank you for those notes on storms Pat and Fame and for your quick reply. Best Regards,
unread,
Track-type Designation of Madge (1973)
Hi Jennifer, Thank you for those notes on storms Pat and Fame and for your quick reply. Best Regards,
Mar 20
Sohum Chatterjee
,
Jennifer Gahtan - NOAA Federal
2
Mar 14
Incorrectly converted longitude data for AL121967 Chloe
Hi Sohum, Thanks for bringing this issue to our attention and we are looking into it further. Best, -
unread,
Incorrectly converted longitude data for AL121967 Chloe
Hi Sohum, Thanks for bringing this issue to our attention and we are looking into it further. Best, -
Mar 14
Wishnie, Eric B CIV USN FLENUMMETOCCEN CA (USA)
,
Jennifer Gahtan - NOAA Federal
4
Feb 21
IBTrACS Q&A - Dimensions
Most of the timesteps are every 3 hours (usually interpolated from the 6 hourly data provided by most
unread,
IBTrACS Q&A - Dimensions
Most of the timesteps are every 3 hours (usually interpolated from the 6 hourly data provided by most
Feb 21
Vincent MAAREK
,
Jennifer Gahtan - NOAA Federal
4
12/6/23
Judy 2023 not accurately reported in Ibtracs
Hi Jennifer, Thank you very much for the update. Kind regards, VIncent De : Jennifer Gahtan - NOAA
unread,
Judy 2023 not accurately reported in Ibtracs
Hi Jennifer, Thank you very much for the update. Kind regards, VIncent De : Jennifer Gahtan - NOAA
12/6/23
Mahdieh Givehki
,
Ken Knapp - NOAA Federal
2
11/14/23
Information
Hi- IBTrACS has the same data available in 3 formats. No one product is different except in format.
unread,
Information
Hi- IBTrACS has the same data available in 3 formats. No one product is different except in format.
11/14/23
Sayan Jana
,
Jennifer Gahtan - NOAA Federal
2
9/11/23
Not able to download Netcdf4 data
Hi Sayan, Please try again; the data should be accessible now. Thanks, Jennifer On Sun, Sep 10, 2023
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Not able to download Netcdf4 data
Hi Sayan, Please try again; the data should be accessible now. Thanks, Jennifer On Sun, Sep 10, 2023
9/11/23
Lam Nguyen
, …
David Schmid
4
9/1/23
Past Provisional track
Hi Ken Many thanks for your answer. This is very helpful. Nevertheless, it would be very much
unread,
Past Provisional track
Hi Ken Many thanks for your answer. This is very helpful. Nevertheless, it would be very much
9/1/23
Michael Morrone
,
Jennifer Gahtan - NOAA Federal
3
8/30/23
Getting 403 Forbidden Error Accessing IBTracs NetCDF Data
Hi Jennifer, Yes, I was just able to download the file I was looking for! Thank you for your help.
unread,
Getting 403 Forbidden Error Accessing IBTracs NetCDF Data
Hi Jennifer, Yes, I was just able to download the file I was looking for! Thank you for your help.
8/30/23
沈正钦
,
Jennifer Gahtan - NOAA Federal
2
8/14/23
Partially missing of the 1990 ABE typhoon intensity data from variable usa_wind
Hi Zhengqin Shen, The USA data for this part of the storm ABE is currently in IBTrACS as a spur with
unread,
Partially missing of the 1990 ABE typhoon intensity data from variable usa_wind
Hi Zhengqin Shen, The USA data for this part of the storm ABE is currently in IBTrACS as a spur with
8/14/23
David Schmid
,
Ken Knapp - NOAA Federal
3
6/8/23
IBTrACS ACTIVE List
Hi Ken, Many thanks for your answers! This is very helpful information. Best regards, David Ken Knapp
unread,
IBTrACS ACTIVE List
Hi Ken, Many thanks for your answers! This is very helpful information. Best regards, David Ken Knapp
6/8/23
Sandra Rayne - NOAA Federal
,
Ken Knapp - NOAA Federal
3
5/25/23
Mandous Typo
Hi Ken, No worries! Thank you for looking into this :) Sandra On Thu, May 25, 2023 at 10:00 AM Ken
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Mandous Typo
Hi Ken, No worries! Thank you for looking into this :) Sandra On Thu, May 25, 2023 at 10:00 AM Ken
5/25/23
Keenan Fryer
,
Ken Knapp - NOAA Federal
3
5/11/23
storm_speed and storm_direction convention
Perfect! Thank you for the explanation! On Monday, May 8, 2023 at 10:51:55 AM UTC-6 Ken Knapp - NOAA
unread,
storm_speed and storm_direction convention
Perfect! Thank you for the explanation! On Monday, May 8, 2023 at 10:51:55 AM UTC-6 Ken Knapp - NOAA
5/11/23
Lam Nguyen
,
Jennifer Gahtan - NOAA Federal
2
3/29/23
TCvitals data source
Hi Tung Lam, The "tcvightals" name is not a typo and comes from tc vitals data that we
unread,
TCvitals data source
Hi Tung Lam, The "tcvightals" name is not a typo and comes from tc vitals data that we
3/29/23
ainunazhari
2/21/23
Difference Tropical Cyclone Data from 1979 - 2021
Dear IBTrACS Team, Last April 2021, I have downloaded the IBTrACS data (ibtracs.ALL.list.v04r00.csv).
unread,
Difference Tropical Cyclone Data from 1979 - 2021
Dear IBTrACS Team, Last April 2021, I have downloaded the IBTrACS data (ibtracs.ALL.list.v04r00.csv).
2/21/23
Markus Kaukonen
,
Jennifer Gahtan - NOAA Federal
2
2/7/23
ibtracs-qa@googlegroups.com
Hi Markus, HENRIETTE and ISMAEL are treated separately in IBTrACS and they do have different storm
unread,
ibtracs-qa@googlegroups.com
Hi Markus, HENRIETTE and ISMAEL are treated separately in IBTrACS and they do have different storm
2/7/23
Michael Morrone
2/1/23
Shift in file availability?
Hello, I've noticed since the beginning of the year that the IBTracs netcdf file from https://www
unread,
Shift in file availability?
Hello, I've noticed since the beginning of the year that the IBTracs netcdf file from https://www
2/1/23