EUR Data Management Group

Data Update Procedure (METNO)

Update-Procedure Flow-Chart
The detailed Data Update Procedure can be found in EUR ICAO Doc.018, Appendix B. The intend of this page is to inform about the most important issues in regard to register or unregister OPMET-data.


In order to have an overview of the actual available alphanumeric OPMET-data within the ICAO-EUR region, without performing monitoring exercises all the time, the Data Update Procedure has been implemented.

All changes in the OPMET-data production should be reported by NOCs (National OPMET Centre) to the responsible ROC (Regional OPMET Centre) who will send the information further on to the DMG-Focal Point.

The DMG-FP collects all change requests and sends them to the DMG members for acceptance. The accepted changes will be sent via a METNO-message one week before the next AIRAC-date.

The operational implementation is taking place on AIRAC dates at 11:00 UTC.

Next 5 AIRAC-dates (at 11:00 UTC)

As stated above and also depicted in the below flow chart, the procedure is linked to the AIRAC-cycle. Changes should as far as possible be implemented on those days. Sometimes it is not possible to stick to those. In such cases it is also possible to have an EXTRA METNO issued by the DMG-focal point.

Requesting New Data

If there is a need for requesting new data, either from the EUR-Region or outside, an additional procedure has to be used. Please have a look in the EUR Doc.018, Appendix B for details.

If you have any questions or want to so-ordiante any changes, do not hesitate to contact your responsible ROC.


Following you have the possibility to search for METNO-messages. You can use different combinations to search for data. If you do not select any of the below parameters, you will get the complete list of all METNO-messages that have ecer been issued. You can get such a list also as a WORD-file. This file also includes a list of all registered bulletins until today.

Location Indicator Data Type (T1T2) Country Code (A1A2) Header CCCC Year Month