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Marine meteorology

The provision of marine weather services is an important function of the national meteorological services of coastal and maritime nations — including the Met Office. As well as forecasts the Met Office plays a major role in providing observations of weather at sea.

Global Collecting Centre for Marine Climatological Data

Canmar Venture ship

Under the Joint WMO/IOC Technical Commission for Oceanography and Marine Meteorology (JCOMM), intergovernmental body of experts, which provides the international co-ordination, regulation and management of marine meteorological services, the Met Office runs one of two Global Collecting Centres (GCCs). The GCC is run as part of the World Meteorological Organization's (WMO) Marine Meteorology Programme.


The aim of the Global Collecting Centre is to ensure that marine data are received from contributing members around the world and processed to an agreed standard. The data are then distributed on a quarterly basis to eight responsible members, each with their own area of responsibility.

Countries under the MCSS

Image: Data processing scheme

41 contributing members as of 2002

These eight members are:

  • Germany
  • Hong Kong (China)
  • India
  • Japan
  • Netherlands
  • Russian Federation
  • United Kingdom
  • United States of America

GCC Annual Report

At the end of each year the GCC Annual Report is published. This details data received and processed over the past year and also any new developments and future plans within the MCSS (Marine Climatological Summaries Scheme).

Covering letter (PDF, 958 kB)

Annual Report 2010 (PDF, 384 kB)

Update of code format

At JCOMM-III in Marrakech, November 2009, the updated IMMT-4 format was adopted for general use from 1 January 2011. This is now the preferred format for delayed mode observations and includes the capability to record the new ship (VOS) classes as well as relative humidity as a separate element.

The International Maritime Meteorological Tape (IMMT) format, for the exchange of delayed-mode observations, is now in its 4th version: IMMT-4 (PDF, 75 kB)

The Minimum Quality Control Standards (MQCS) are now in their 6th version: MQCS-6 (PDF, 104 kB)

Consolidated MQC for Contributing Member software version 4 is now available from the World Meteorological Organization.

Contact the GCCs

United Kingdom GCC
Met Office
Saughton House
Broomhouse Drive
EH11 3XQ
Germany GCC
Deutscher Wetterdienst
KU24 / GCC
P.O. Box 30 11 90
D-20304 Hamburg

German GCC website
Email: gcc@metoffice.gov.uk Email: gcc@dwd.de

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