Using ECMWF's Forecasts (UEF2019)

ECMWF | Reading | 3-6 June 2019

A forum to discuss the use and performance of ECMWF's forecasts and related products

“Using ECMWF’s Forecasts” provides a forum for exchanging ideas and experiences on the use of ECMWF data and products. It is open to all ECMWF forecast users around the world and provides an opportunity to give feedback to ECMWF on forecast performance and on the range of available products, and to learn about recent developments of ECMWF’s forecasting system.

2019 theme: “The strength of ensembles”

National weather services and private weather providers have recognised the importance of ensemble forecasts and that information about uncertainty improves the ability to make decisions based on weather forecasts. ‘Forecasts are not complete without information on uncertainty’ was one of the closing messages of a past UEF meeting. In 2019 we will return to the topic of ensembles and their strength.

Twenty-five years ago ECMWF was one of the first forecasting centres to start issuing operational ensemble forecasts. The implementation of these ensembles induced a paradigm shift in numerical weather prediction (NWP). Centres moved from providing a single forecast to issuing a range of forecasts that can be used to identify possible future scenarios, to compute the probability of events of interest, and in general to estimate forecast confidence levels. Today, ensembles are routinely used to provide estimates of the probability distributions of analyses and forecasts. Great progress has been made to aid their visualisation and communication to wider audiences. 

The UEF meeting will offer an opportunity for participants to showcase the strength of ensembles. The meeting will also provide a framework where participants can share their experiences with ECMWF data and provide feedback on ECMWF products.

UEF2019 will focus on the following thematic areas:

  • Processing of model outputs: this session will be dedicated to model output developments. Case studies demonstrating the use of new model output developments are welcomed.

  • Visualisation: in this session we welcome contributions about the visualisation of ensembles and derived products

  • Verification and diagnostics: this session will focus on the assessment of the skill and consistency of ensemble forecasts, including impacts. 

  • Application and Impact forecasting: this session will look at how weather forecasts are used in applications for sectors such as water, energy, agriculture, fire and health. It will feature case studies showing the strength of ensembles in such applications.


The programme will contain talks by participants and ECMWF staff, keynote addresses on specific topics to stimulate discussion, and interactive sessions to encourage networking.

Monday, 3 June, lunchtime UEF2019 opens
Tuesday, 4 June, afternoon Drinks reception
Wednesday 5 June Meeting dinner 
Thursday, 6 June, lunchtime UEF2019 closes

Important dates

November 2018 Registration and abstract submission open
15 March 2019 Abstract submission deadline
12 April 2019 Registration deadline
29 March 2019 Submission acceptance notifications
29 April 2019 Registration acceptance notifications

Registration and abstract submission

The maximum number of participants is set at 100; priority will be given to applicants who submit an abstract.

We are seeking submissions in the following formats:

Poster: posters should be standard A0 portrait orientation; 841mm (width) x 1189mm (height). Please do not exceed these measurements. Viewing time and details on setting up and taking down posters will be advised before the meeting.

Standard presentation: oral presentations will be allocated 20 minutes, with a further 5 minutes for questions. The talks will be live streamed so speakers should make their presentation available in advance.

Workshop: proposals for workshops can include large group, break-out, or panel discussions and will be allocated 60 minutes.

Registration and abstract submission