World Meteorological Organization

Weather Reporting (WMO-No. 9)

VOLUME C1 - CATALOGUE OF METEOROLOGICAL BULLETINS

_{Part 1 - Observational Data
          Part 2 - GRID and GRIB Bulletins}

This Publication contains the list of meteorological bulletins for global, inter-regional and regional exchange on the Global Telecommunication System:

UPDATE

The Provisions for the Transition from  WMO Information System (WIS) 1.0 and Global Telecommunication System to WIS 2.0 was approved at INFCOM-3 and then endorsed at EC-78.

The publication (WMO-No.1323) is now accessible online at the following link: https://library.wmo.int/idurl/4/69050.

One of the decisions is that the Manual on the Global Telecommunication System (WMO-No. 386) will no longer be updated from 31 December 2024. At the same time, MetNo and VolC1 will not be updated starting 1 January 2025.

Last updated: 15 January 2025

Volume C1 

• Vol. C1 is available here. (https://wis.wmo.int/operational-info/VolumeC1/)
• Updated weekly
  • Flatfile -field "category": [.txt] [.zip] [.xml] 

METNO Service 

• This publication is kept up-to-date by a weekly METNO service on a weekly basis
• Brief explanation of a METNO message
• METNO is available here. (https://wis.wmo.int/operational-info/METNO/)

      The WMO Secretariat migrated the WMO FTP server to the WMO SFTP server on 14 July 2021. More information can be found here.

Abbreviated headings (TTAAii CCCC)

• In the Manual on the Global Telecommunication System (WMO-No.386), Volume I - Part II 2.3.2 Abbreviated heading
  • The allocation of WMO standard data designators (TTAAii) is given in Attachment II-5 (WMO-No.386)
    • TTAAii list in WMO No 386, Part II, Att II (Last updated in 2020)
  • The list of international four-letter location indicators (CCCC) is given in WMO-No.9, Vol.C1 Annex I
    • CCCC list is updated upon requests
    • CCCC list can be found here.(Last updated in July 2022)

Updating procedures and method of notifying the WMO Secretariat of amendments:

• Semi Annual updates (SA) = A complete list of bulletins under the RTH zone of responsibility
• Advanced Notification (AN) = Amendments to the current list of bulletins under RTH zone of responsibility
  • File Naming
  • Record Format: [Semi Annual updates (SA)] [Advanced Notification (AN)]
  • SSH File transfer Protocol (SFTP)

Who maintains the Catalogue

World Meteorological Centres (WMCs) and the Regional Telecommunication Hubs (RTHs) on the Main Telecommunication Network (MTN) shall maintain the Catalogue of Meteorological Bulletins as regards bulletins issued from the zone for which they are responsible for the collection, exchange and distribution of data, and also including data from the Antarctica, as appropriate.

• Functions and Responsibilities of the Meteorological Telecommunication Centres (WMO No. 386 - Part I - Organization of the GTS)
• Responsibilities of Regional Telecommunication Hubs for the transmission of observational data and processed information
• Focal Points for Regional Telecommunication Hubs (RTHs)
• WIS Secretariat (wis@wmo.int)