Satellite Application Facility for Numerical Weather Prediction

The NWP SAF aims to improve and support the interface between satellite data/products and European activities in NWP.

The NWP SAF is one of several EUMETSAT SAFs (Satellite Application Facilities). Utilising specialist expertise from the Member States, SAFs are dedicated centres of excellence for processing satellite data and form an integral part of the distributed EUMETSAT Application Ground Segment. Further information about SAFs is available on the EUMETSAT web site.

The SAF for NWP interacts, where appropriate, with related work in other SAFs and in other EUMETSAT activities in order to enhance collaboration and to minimise duplication of effort.

Recent News and Updates

  • Bounced emails - May 13, 2020
    Recently emails were sent out to users of RTTOV and !D-Var. More than 170 of these emails bounced. Can ALL users, not just those who use RTTOV or !D-Var, please check the email address used for your account and update of required –
  • 1D-Var User Survey – – there is still time to take part - April 16, 2020
    Thank you to all those who have already submitted responses to the NWP SAF 1D-Var user survey. If you haven’t been able to respond to the survey yet, there is still time to provide your input. In order to give everyone a chance to take part, the survey will remain open until Friday 24 April. This is a good opportunity to have your say about the future development of the 1D-Var code. As a reminder, the link to the survey is:
  • NWP SAF 1D-Var User Survey 2020 - March 25, 2020
    In order to help us make decisions about future developments of the NWP SAF 1D-Var, we would be grateful if you could complete a short survey. There are 13 questions about your use of the code, and your views on priorities for future developments. Please fill in the survey before 15th April 2020. You can find more information about 1D-Var on the 1D-Var pages. Survey:
  • Coronavirus (COVID-19) and NWP SAF operations - March 19, 2020
    We wish all of our users well during these difficult times. The NWP SAF continues to operate with the team now teleworking. While we aim to provide continuity of service wherever possible, our responses to issues and user requests through the Helpdesk may not always be at our normal level of performance during this current exceptional situation.
  • Database restored - March 4, 2020
    We have been experiencing issues with the site over late few weeks. We have managed to rebuild the database and hopefully the site is now functioning correctly. However, user registrations between 27th February and 11:30 today  (4th March)  have been lost. We apologise for this but ask that you recreate your accounts and if you have any problems email us at

For older news, see the News Archive.