IBTrACS Q&A

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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] googlegroups.com.

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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Scott Bruce

Oct 14

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

Oct 14

Michael Morrone, Jennifer Gahtan - NOAA Federal4

Oct 2

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

Oct 2

Elvis Herrera, Jennifer Gahtan - NOAA Federal2

Sep 12

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

Sep 12

Dr. Ottfried Thümmel, James Barker2

Sep 1

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

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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

Sep 1

羅倫素, Jennifer Gahtan - NOAA Federal2

Aug 22

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,

Aug 22

BA Racoma

Aug 22

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

Aug 22

Mike Fiorino

Aug 8

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

Aug 8

Scott Bruce, Jennifer Gahtan - NOAA Federal4

Aug 6

USA_SEAHGT value either 12' or null

Hi Scott, Measurements like radii tend to be chosen at consistent values to allow for standard

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USA_SEAHGT value either 12' or null

Hi Scott, Measurements like radii tend to be chosen at consistent values to allow for standard

Aug 6

ming zhang, Jennifer Gahtan - NOAA Federal2

Jul 28

Unable to Download IBTrACS Data (503 Service Unavailable)

Hi Ming Zhang, IBTrACS data should be available for download now, apologies for lack of access

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Unable to Download IBTrACS Data (503 Service Unavailable)

Hi Ming Zhang, IBTrACS data should be available for download now, apologies for lack of access

Jul 28

Steven H Young, Jennifer Gahtan - NOAA Federal2

Jul 18

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

Jul 18

Zhi Sun, Jennifer Gahtan - NOAA Federal2

Jul 7

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

Jul 7

Mincheol Moon, Jennifer Gahtan - NOAA Federal2

Jul 2

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

Jul 2

Jacob

Jun 24

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

Jun 24

Ariel Dome, Jennifer Gahtan - NOAA Federal2

Jun 24

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

Jun 24

Jesse Ferrell, … Jennifer Gahtan - NOAA Federal4

Jun 10

Question on cyclone closest to equator

Hi Jason and Jesse, The IBTrACS variable NATURE isn't a strength classification and shouldn't

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Question on cyclone closest to equator

Hi Jason and Jesse, The IBTrACS variable NATURE isn't a strength classification and shouldn't

Jun 10

Drop 》《 Pressure, Jennifer Gahtan - NOAA Federal4

Jun 4

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

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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

Jun 4

Tristan Downing, Jennifer Gahtan - NOAA Federal3

May 7

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

May 7

Tinka Valentijn

Apr 14

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

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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

Apr 14

Jennifer Gahtan - NOAA Federal

Apr 3

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

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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

Apr 3

Vincent Maarek, … Jonathan Vigh6

Mar 28

Difference between IBTrACS and ATCF B-deck

Ken, Jonathan, Many thanks for all your detailed answers, this has proven to be extremely helpful.

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Difference between IBTrACS and ATCF B-deck

Ken, Jonathan, Many thanks for all your detailed answers, this has proven to be extremely helpful.

Mar 28

Benjamin Branoff, Jennifer Gahtan - NOAA Federal3

Mar 21

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-

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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-

Mar 21

Steven H Young, Jennifer Gahtan - NOAA Federal2

Mar 21

IBTrACS Formatting error

Hi Steven, Thanks for bringing this to our attention. The issue has been fixed. Jennifer On Wed, Mar

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IBTrACS Formatting error

Hi Steven, Thanks for bringing this to our attention. The issue has been fixed. Jennifer On Wed, Mar

Mar 21

ben s., … Dan Chavas11

Mar 10

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

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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

Mar 10

Manuraj, Jennifer Gahtan - NOAA Federal2

Jan 21

Hurricane track forecast data availability

Hi- IBTrACS is not to be used for decisions of life and property in real time. IBTrACS does not

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Hurricane track forecast data availability

Hi- IBTrACS is not to be used for decisions of life and property in real time. IBTrACS does not

Jan 21

Olivier Archer, … AHABYONA JAMES6

Jan 15

basins and subbasins boundaries

Thanks a lot Warm regards, James Ahabyona I have no special talents. I am only passionately curious.

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basins and subbasins boundaries

Thanks a lot Warm regards, James Ahabyona I have no special talents. I am only passionately curious.

Jan 15

Ivo Welch, Jennifer Gahtan - NOAA Federal2

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;

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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 Federal3

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

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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

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Re: [ibtracs-qa]

Hi Majinzi, Data may be downloaded via the IBTrACS website. Scroll down to access methods and click

12/4/24

Cheng-Hsiang Peter Chih, … Jennifer Gahtan - NOAA Federal7

12/4/24

Download problem

Please try again now, the issue should be resolved. -Jennifer On Tue, Dec 3, 2024 at 8:20 PM RPA

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Download problem

Please try again now, the issue should be resolved. -Jennifer On Tue, Dec 3, 2024 at 8:20 PM RPA

12/4/24

Jennifer Gahtan - NOAA Federal

11/29/24

Re: [ibtracs-qa] Repeated Numbers in 2022

Hello, Which version of the IBTrACS data are you using? I don't think this is a problem in the

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Re: [ibtracs-qa] Repeated Numbers in 2022

Hello, Which version of the IBTrACS data are you using? I don't think this is a problem in the

11/29/24