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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
IBTrACS News group
which is where the IBTrACS team posts updates on the product.
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Prabhsimran
2
Jan 7
Request for Permission to Host IBTrACS Cyclone data for Northern Indian Ocean on Indo ArcGIS Living Atlas
Hi IBTrACS team, I hope this message finds you well. I wanted to kindly follow up regarding my
unread,
Request for Permission to Host IBTrACS Cyclone data for Northern Indian Ocean on Indo ArcGIS Living Atlas
Hi IBTrACS team, I hope this message finds you well. I wanted to kindly follow up regarding my
Jan 7
Yann Miel
12/29/25
Ibtracs disruption
Hello, We've been having issues since this morning to access https://www.ncei.noaa.gov/data/
unread,
Ibtracs disruption
Hello, We've been having issues since this morning to access https://www.ncei.noaa.gov/data/
12/29/25
Scott Bruce
10/14/25
US Government Shutdown
Hi folks, There is a notice that the website won't be updated due to the government shutdown. The
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US Government Shutdown
Hi folks, There is a notice that the website won't be updated due to the government shutdown. The
10/14/25
Michael Morrone
,
Jennifer Gahtan - NOAA Federal
4
10/2/25
IBTracs Status
Thanks, Jennifer! Regards, Mike From: 'Jennifer Gahtan - NOAA Federal' via IBTrACS Q&A
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IBTracs Status
Thanks, Jennifer! Regards, Mike From: 'Jennifer Gahtan - NOAA Federal' via IBTrACS Q&A
10/2/25
Elvis Herrera
,
Jennifer Gahtan - NOAA Federal
2
9/12/25
IBTrACS web service
Hi Elvis, Unfortunately, NCEI does not provide a web feature layer for IBTrACS, though our data are
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IBTrACS web service
Hi Elvis, Unfortunately, NCEI does not provide a web feature layer for IBTrACS, though our data are
9/12/25
Dr. Ottfried Thümmel
,
James Barker
2
9/1/25
Question concerning a typhoon in October 1900 in Nothern West Pacific
On Monday, September 1, 2025 at 3:40:57 PM UTC+2 Dr. Ottfried Thümmel wrote: Dear Sir or Madam, in
unread,
Question concerning a typhoon in October 1900 in Nothern West Pacific
On Monday, September 1, 2025 at 3:40:57 PM UTC+2 Dr. Ottfried Thümmel wrote: Dear Sir or Madam, in
9/1/25
羅倫素
,
Jennifer Gahtan - NOAA Federal
2
8/22/25
WPAC Basin Best Track Data from 2024
Hi, The 2024 Best Track data from HKO has been added to IBTrACS. Thanks, Jennifer On Wed, Aug 13,
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WPAC Basin Best Track Data from 2024
Hi, The 2024 Best Track data from HKO has been added to IBTrACS. Thanks, Jennifer On Wed, Aug 13,
8/22/25
BA Racoma
8/22/25
How to Cite Technical Documentation?
Hello everyone, Just to preface this email, my colleagues, students, and I are very thankful to the
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How to Cite Technical Documentation?
Hello everyone, Just to preface this email, my colleagues, students, and I are very thankful to the
8/22/25
Mike Fiorino
8/8/25
A 'super' Best Track & Halsey's Typhoon of December 1944
hi IBTrACSters, I am developing what I refer to as a 'super' best track by incorporating or
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A 'super' Best Track & Halsey's Typhoon of December 1944
hi IBTrACSters, I am developing what I refer to as a 'super' best track by incorporating or
8/8/25
Scott Bruce
,
Jennifer Gahtan - NOAA Federal
4
8/6/25
USA_SEAHGT value either 12' or null
Hi Scott, Measurements like radii tend to be chosen at consistent values to allow for standard
unread,
USA_SEAHGT value either 12' or null
Hi Scott, Measurements like radii tend to be chosen at consistent values to allow for standard
8/6/25
ming zhang
,
Jennifer Gahtan - NOAA Federal
2
7/28/25
Unable to Download IBTrACS Data (503 Service Unavailable)
Hi Ming Zhang, IBTrACS data should be available for download now, apologies for lack of access
unread,
Unable to Download IBTrACS Data (503 Service Unavailable)
Hi Ming Zhang, IBTrACS data should be available for download now, apologies for lack of access
7/28/25
Steven H Young
,
Jennifer Gahtan - NOAA Federal
2
7/18/25
Who is Source Agency MLC
Hi Steven, MLC stands for the Chenoweth Dataset in which Michael L. Chenoweth compiled a reanalysis
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Who is Source Agency MLC
Hi Steven, MLC stands for the Chenoweth Dataset in which Michael L. Chenoweth compiled a reanalysis
7/18/25
Zhi Sun
,
Jennifer Gahtan - NOAA Federal
2
7/7/25
503 service
Hi Zhi, IBTrACS data should be accessible again. Also note, IBTrACS is not an operational source for
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503 service
Hi Zhi, IBTrACS data should be accessible again. Also note, IBTrACS is not an operational source for
7/7/25
Mincheol Moon
,
Jennifer Gahtan - NOAA Federal
2
7/2/25
Inquiry Regarding Irregular Hourly Timestamps in IBTrACS v04r01
1. As in previous versions of IBTrACS, data are interpolated to 3-hourly timesteps (most reported at
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Inquiry Regarding Irregular Hourly Timestamps in IBTrACS v04r01
1. As in previous versions of IBTrACS, data are interpolated to 3-hourly timesteps (most reported at
7/2/25
Jacob
6/24/25
Storm Intensity Within a Radius
I am looking to get Hurricane data within a 60 mile radius of Bermuda since 1969. The tool shows the
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Storm Intensity Within a Radius
I am looking to get Hurricane data within a 60 mile radius of Bermuda since 1969. The tool shows the
6/24/25
Ariel Dome
,
Jennifer Gahtan - NOAA Federal
2
6/24/25
Service Unavailable
Hi Ariel, Data are currently available. Thanks, Jennifer On Tue, Jun 24, 2025 at 12:54 AM Ariel Dome
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Service Unavailable
Hi Ariel, Data are currently available. Thanks, Jennifer On Tue, Jun 24, 2025 at 12:54 AM Ariel Dome
6/24/25
Jesse Ferrell
, …
Jennifer Gahtan - NOAA Federal
4
6/10/25
Question on cyclone closest to equator
Hi Jason and Jesse, The IBTrACS variable NATURE isn't a strength classification and shouldn't
unread,
Question on cyclone closest to equator
Hi Jason and Jesse, The IBTrACS variable NATURE isn't a strength classification and shouldn't
6/10/25
Drop 》《 Pressure
,
Jennifer Gahtan - NOAA Federal
4
6/4/25
Missing RSMC Nadi data from Dovi, Fili 2022
Hi Kin, This issue with the pressures has been fixed. Thanks once again for bringing this to our
unread,
Missing RSMC Nadi data from Dovi, Fili 2022
Hi Kin, This issue with the pressures has been fixed. Thanks once again for bringing this to our
6/4/25
Tristan Downing
,
Jennifer Gahtan - NOAA Federal
3
5/7/25
Missing RSMC La Réunion data from Freddy 2023
Great, thank you for your response Jennifer! Best, Tristan On Tuesday, May 6, 2025 at 10:26:10 AM UTC
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Missing RSMC La Réunion data from Freddy 2023
Great, thank you for your response Jennifer! Best, Tristan On Tuesday, May 6, 2025 at 10:26:10 AM UTC
5/7/25
Tinka Valentijn
4/14/25
Difference tracks Historical Hurricane Tracks viewer and IBTrACS line file
Dear all, I am highly interested in using this great data source, thank you for creating it! I have
unread,
Difference tracks Historical Hurricane Tracks viewer and IBTrACS line file
Dear all, I am highly interested in using this great data source, thank you for creating it! I have
4/14/25
Jennifer Gahtan - NOAA Federal
4/3/25
Re: [ibtracs-qa] Complete Tracks for TC analysis in QGIS
Hi Diana, I am not equipped to help with qgis specific questions, but IBTrACS contains data from
unread,
Re: [ibtracs-qa] Complete Tracks for TC analysis in QGIS
Hi Diana, I am not equipped to help with qgis specific questions, but IBTrACS contains data from
4/3/25
Vincent Maarek
, …
Jonathan Vigh
6
3/28/25
Difference between IBTrACS and ATCF B-deck
Ken, Jonathan, Many thanks for all your detailed answers, this has proven to be extremely helpful.
unread,
Difference between IBTrACS and ATCF B-deck
Ken, Jonathan, Many thanks for all your detailed answers, this has proven to be extremely helpful.
3/28/25
Benjamin Branoff
,
Jennifer Gahtan - NOAA Federal
3
3/21/25
SIDs between csv and shapefile inconsistent for at least one storm
ok, thank you. I can confirm that the SID at https://www.ncei.noaa.gov/data/international-best-track-
unread,
SIDs between csv and shapefile inconsistent for at least one storm
ok, thank you. I can confirm that the SID at https://www.ncei.noaa.gov/data/international-best-track-
3/21/25
Steven H Young
,
Jennifer Gahtan - NOAA Federal
2
3/21/25
IBTrACS Formatting error
Hi Steven, Thanks for bringing this to our attention. The issue has been fixed. Jennifer On Wed, Mar
unread,
IBTrACS Formatting error
Hi Steven, Thanks for bringing this to our attention. The issue has been fixed. Jennifer On Wed, Mar
3/21/25
ben s.
, …
Dan Chavas
11
3/10/25
Q&A
source of USA_RMW in v04r00
Great, thanks so much Jennifer! - Dan On Mon, Mar 10, 2025 at 1:32 PM Jennifer Gahtan - NOAA Federal
unread,
Q&A
source of USA_RMW in v04r00
Great, thanks so much Jennifer! - Dan On Mon, Mar 10, 2025 at 1:32 PM Jennifer Gahtan - NOAA Federal
3/10/25
Manuraj
,
Jennifer Gahtan - NOAA Federal
2
1/21/25
Hurricane track forecast data availability
Hi- IBTrACS is not to be used for decisions of life and property in real time. IBTrACS does not
unread,
Hurricane track forecast data availability
Hi- IBTrACS is not to be used for decisions of life and property in real time. IBTrACS does not
1/21/25
Olivier Archer
, …
AHABYONA JAMES
6
1/15/25
basins and subbasins boundaries
Thanks a lot Warm regards, James Ahabyona I have no special talents. I am only passionately curious.
unread,
basins and subbasins boundaries
Thanks a lot Warm regards, James Ahabyona I have no special talents. I am only passionately curious.
1/15/25
Ivo Welch
,
Jennifer Gahtan - NOAA Federal
2
12/17/24
Kossin et al PNAS 2020 Update?
Hi Ivo, ADT-HURSAT is currently in the process of being updated with the last few years of activity;
unread,
Kossin et al PNAS 2020 Update?
Hi Ivo, ADT-HURSAT is currently in the process of being updated with the last few years of activity;
12/17/24
Michael Morrone
,
Jennifer Gahtan - NOAA Federal
3
12/13/24
Nans/weird USA SLP values in Freddy (2023036S12117)
Hi Mike, This has been fixed. Thanks, Jennifer On Thu, Dec 5, 2024 at 11:15 AM Jennifer Gahtan - NOAA
unread,
Nans/weird USA SLP values in Freddy (2023036S12117)
Hi Mike, This has been fixed. Thanks, Jennifer On Thu, Dec 5, 2024 at 11:15 AM Jennifer Gahtan - NOAA
12/13/24
Jennifer Gahtan - NOAA Federal
12/4/24
Re: [ibtracs-qa]
Hi Majinzi, Data may be downloaded via the IBTrACS website. Scroll down to access methods and click
unread,
Re: [ibtracs-qa]
Hi Majinzi, Data may be downloaded via the IBTrACS website. Scroll down to access methods and click
12/4/24