IBTrACS Q&A

Contact owners and managers

1–30 of 189

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.

0 selected

羅倫素, Jennifer Gahtan - NOAA Federal2

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 Federal2

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 Federal3

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:

unread,

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 Federal3

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 Federal2

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 Federal2

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,

unread,

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 Federal2

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 Federal6

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 Federal2

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 Federal4

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 Federal4

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 Federal2

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 Federal2

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

unread,

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 Schmid4

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 Federal3

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 Federal2

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 Federal3

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 Federal3

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

unread,

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 Federal3

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 Federal2

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 Federal2

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

G Pounder, Carl Schreck - NOAA Affiliate4

1/18/23

Summary global data by year

I appreciate that the overlap between basins and years makes it complicated to report summary

unread,

Summary global data by year

I appreciate that the overlap between basins and years makes it complicated to report summary

1/18/23

ashwin .D, … Steven Young10

1/9/23

Unable to get track of Cyclone Mandous

Just to throw my 2 cents in, the following track information is sourced from near-real time JTWC

unread,

Unable to get track of Cyclone Mandous

Just to throw my 2 cents in, the following track information is sourced from near-real time JTWC

1/9/23

Kyle Hunter, … Raven Vasquez5

12/16/22

Sea Surface Temperatures (SSTs) Along Track

Little late to respond, however there is a new dataset that is sort of a derivative of IBTrACS that

unread,

Sea Surface Temperatures (SSTs) Along Track

Little late to respond, however there is a new dataset that is sort of a derivative of IBTrACS that

12/16/22

wang...@mail.ustc.edu.cn, … Jennifer Gahtan - NOAA Federal4

11/21/22

Some questions about STORM_DIR

Hi Chita, If you are calculating the angle just by using your figures, note that your axes aren't

unread,

Some questions about STORM_DIR

Hi Chita, If you are calculating the angle just by using your figures, note that your axes aren't

11/21/22

Alex Alex, Jason Rees2

6/7/22

Definition for tropical storms in Madagascar

Hi Alex Alex, As I am sure you are aware, Madagascar lies in the South-West Indian Ocean tropical

unread,

Definition for tropical storms in Madagascar

Hi Alex Alex, As I am sure you are aware, Madagascar lies in the South-West Indian Ocean tropical

6/7/22

Kevin Nelson, Carl Schreck - NOAA Affiliate4

5/26/22

Purpose of Duplicate Time Entries

It appears IDL is doing something strange with rounding. Below is what I get in python with a similar

unread,

Purpose of Duplicate Time Entries

It appears IDL is doing something strange with rounding. Below is what I get in python with a similar

5/26/22

Markus Kaukonen, Ken Knapp - NOAA Federal2

4/13/22

Non-standard storm names

Hi Markus- IBTrACS gathers updates for the provisional data from automated sources. PResently, that

unread,

Non-standard storm names

Hi Markus- IBTrACS gathers updates for the provisional data from automated sources. PResently, that

4/13/22