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ALADIN
High Resolution Numerical Weather Prediction Project
Website of the ALADIN Consortium

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The PAC and PAC-HAC meeting took place in Dublin on 22-23 May 2018. The main point at the agenda of these meetings was the review of the progress of the convergence roadmap and the preparation of a "scope document" as requested by the GA-C at their last meeting (the PMs and the PAC-HAC were tasked to reflect on the scope of the future single consortium, to identify the core areas of collaboration at the start of the single consortium .., to develop a vision and mission and to identify core values, ...). See the minutes of these meetings.

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The joint 28th ALADIN Wk & HIRLAM ASM 2018 was held mid-April on the premises of Météo-France in Toulouse.

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28th Wk&ASM 2018 : speakers
  • 4 full days (16-19 April) for the opening session, the thematic sessions, the posters session, some Working Group discussions, the LTM meeting, an official dinner and a public conference,
  • 20 April 2018 : HMG/CSSI meeting (whole day), for HMG/CSSI members only.

The agenda, the presentations - pdf files and videos of the sessions, the posters ... are on-line, the minutes of the LTM meeting and of the HMG/CSSI meeting are also on-line.

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28th Wk&ASM 2018 : PMs at the closing session

This joint Wk/ASM obtained the label "EuroScience Open Forum 2018 - TOULOUSE, EUROPEAN CITY OF SCIENCE".

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Just published !

Termonia, P., Fischer, C., Bazile, E., Bouyssel, F., Brožková, R., Bénard, P., Bochenek, B., Degrauwe, D., Derková, M., El Khatib, R., Hamdi, R., Mašek, J., Pottier, P., Pristov, N., Seity, Y., Smolíková, P., Španiel, O., Tudor, M., Wang, Y., Wittmann, C., and Joly, A.: The ALADIN System and its canonical model configurations AROME CY41T1 and ALARO CY40T1, Geosci. Model Dev., 11, 257-281, https://doi.org/10.5194/gmd-11-257-2018, 2018.

The purpose of this paper is (i) to define the ALADIN System in relation to the global counterparts IFS and ARPEGE, (ii) to explain the notion of the CMCs, (iii) to document their most recent versions, and (iv) to illustrate the process of the validation and the porting of these configurations to the operational forecast suites of the partner institutes of the ALADIN consortium.


see also ALADIN-HIRLAM : the BIG TOUR : Newsletter n°10 published on January 31st, 2018


Follow-up of the GA and GA/C :
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Regular 22nd General Assembly and 3rd joint ALADIN GA and HIRLAM Council

The ALADIN GA and the HIRLAM Council met in the Polish NMS premises in Krakow (Poland) on November 21-22, 2017 : the 22nd ALADIN GA, then the LACE Council and the HIRLAM Council in parallel, then the 3rd joint ALADIN GA - HIRLAM C meeting.

  • Besides the usual items on their agendas, the assemblies approved the Rolling Work Plan 2018 (and its completely renewed format), and committed the resources of their NMS to realised it : the HAC/PAC was asked to further discuss its scope and to follow its realisation.
  • The convergence roadmap (towards a single ALADIN/HIRLAM consortium after 2020) was debated and guidelines for the next steps were given to the PMs and the HAC/PAC.
  • Due to lack of time, the "Tour d’ALADIN" could not be presented : the slides are on-line : these 2017 highlights sent by the LTMs will be detailed in the ALADIN-HIRLAM Newsletter n°10, to be published end of January 2018.
  • The ALADIN budget for 2018 was approved, with a new position (20%F.T.E for a DA coordinator) : the position is opened.
  • A new matrix of the ALADIN consortium was approved after changes in some positions.


The concept of the ALADIN project was proposed by Météo-France in 1990, with the aim of building a mutually beneficial collaboration with the National Meteorological Services of Central and Eastern Europe. This collaboration was to be in the field of Numerical Weather Prediction (NWP), which provides the basis for the forecasting tools of modern meteorology. The easy to translate acronym (Aire Limitée Adaptation dynamique Développement InterNational) clearly indicates the major axes of this project at its beginnings.

25 years later, as defined in the 5th Memorandum of Understanding,

The goal of the ALADIN Collaboration is to improve the value of the meteorological, hydrological and environmental warning and forecast services delivered by all Members to their users, through the operational implementation of a NWP system capable of resolving horizontal scales from the meso-beta to the meso-gamma scale and improving the prediction of severe weather phenomena such as heavy precipitation, intensive convection and strong winds.

This objective will be fulfilled through continuation and expansion of the activities of the ALADIN Consortium in the field of High Resolution Short Range Weather Forecast, including:

  • Maintenance of an ALADIN System (...);
  • Joint research and development activities, on the basis of the common Strategic Plan and related Work Plans, with the aim of maintaining the ALADIN System at scientific and technical state of the art level within the NWP community;
  • Sharing scientific results, numerical codes, operational environments, related expertise and know-how, as necessary for all ALADIN Consortium members to conduct operational and research activities with the same tools.

About one hundred scientists, from sixteen countries, each with its own specificity in resources and knowledge base, are permanently contributing to the progress of ALADIN NWP system. They are working together on a modern code of the atmosphere that definitely deserves its proper place between the European state-of-the-art NWP models: 80 Full-Time Equivalent persons in the last years of the project’s life. This code is now operated every day in fifteen Euro-Mediterranean countries, on a huge variety of computing platforms ranging from a PC Cluster under Linux to Vector Computers.

ALADIN consortium had a number of unique successes in the past : for instance, the plugging of an existing physics parameterization in the existing code, leading to the AROME model; ALADIN is at the forefront of the gray-zone problematics with the ALARO physics; ALADIN dynamical core is remarkably stable; ...

ALADIN also allowed to build a high-level scientific team, distributed in sixteen countries that managed to reach the level of the best research centres, as witnessed by the PhD theses and publications in international journals. The General Assembly of Partners, the workshops, the meetings, the newsletters regularly offer opportunity of various exchanges within the ALADIN community.

ALADIN is preparing for the serious evolutions expected within the NWP landscape in the coming five to ten years. There is the ever-lasting question where to draw the line between resolved vs. parameterized processes. There is the question of the efficiency and the scalability of ALADIN dynamical core. There are the external drivers, such as the demands of the end users, and the evolution of the high-performance computing machines. Additionally a serious reorganization of the code is now at hand, in particular within the OOPS project. Besides that, the international meteorological context is steadily changing, specifically with the merger of the ALADIN and the HIRLAM consortia.

Article published on 22 December 2017
dernière modification le 23 January 2018
Section : About the aladin websites
Article published on 8 January 2018
dernière modification le 1 March 2018
Section : ALADIN People : who, where, how to contact

When planning your next visit to Toulouse/CNRM/GMAP, please pay attention to French public holidays and Meteo-France closing days (RTTi) !..

From January 1st, 2014, for security reasons, the access to GMAP offices is only allowed between 7:00 and 21:00 on working days. On Saturdays and on (...)

Article published on 9 January 2018
Section : Software and applications
Article published on 31 January 2018
dernière modification le 1 June 2018
Section : Newsletters
ALADIN-HIRLAM Newsletter : number 2
During the HMG/CSSI meeting in April 2013, ALADIN and HIRLAM consortia decided to join their effort and produce a common newsletter, twice a year. NewsletterEditoClick on the picture to download the NL N°11, due in August 2018 Please, do use the proposed templates when preparing the (...)
Article published on 4 April 2018
dernière modification le 5 April 2018
Section : Governance
ALADIN Partners map

The governance and the management of the ALADIN Consortium is defined by the 5th MoU and by the 22ndt General Assembly at the end of 2017 (see also history of chair persons).

Please consult the complete MoU5 document for details.

For a quick view : the Members map the matrix schematically (...)

Article published on 5 April 2018
dernière modification le 6 April 2018
Section : COMM

This template is proposed for the ALADIN presentations. It was first used at the 21st ALADIN GA (see for instance the Tour d’ALADIN). A new version was prepared in April 2018 when Algeria NMS changed their logo.

In order to keep it update, the Local Team Managers should make sure to let (...)

Article published on 12 April 2018
Section : OOPS
Technical video-conference : 7 June 2018, 14h30 CET / 1.30pm UK Technical video-conference : 6 February 2018 Technical video-conference on Thursday 7 December 2017 Technical video-conference : 26 September 2017 Technical video-conference : 16 May 2017 Technical video-conference : 16 March 2017 (...)
Article published on 15 April 2018
dernière modification le 14 June 2018
Section : ALADIN annual workshops (joint with HIRLAM ASM from 2007)
28<sup class=th Wk&ASM 2018 : speakers" title="28th Wk&ASM 2018 : speakers" />
The joint 28th ALADIN Wk & HIRLAM ASM 2018 will be held on the premises of Météo-France in Toulouse during the third week of April 2018. 16 April 2018, 08:30-20:00 : opening session, DA session, Posters session and LTM meeting, icebreaker 17 April 2018, 08:30-19:00 : Physics and Dynamics (...)
Article published on 16 April 2018
dernière modification le 12 June 2018
Section : About the aladin websites
28<sup class=th Wk&ASM 2018 : speakers" title="28th Wk&ASM 2018 : speakers" />
The PAC and PAC-HAC meeting took place in Dublin on 22-23 May 2018. The main point at the agenda of these meetings was the review of the progress of the convergence roadmap and the preparation of a "scope document" as requested by the GA-C at their last meeting (the PMs and the PAC-HAC were (...)
Article published on 4 May 2018
Section : ALADIN Local Team Managers (LTM) meetings
LTM meetingDatePlaceMinutes 26th LTM meeting 2 April 2019 Madrid, Spain (besides ALADIN workshop) 25th LTM meeting 2 October 2018 Salzbourg, Austria (besides EWGLAM/SRNWP meetings) 24th LTM meeting 16 April 2018 Toulouse, France (besides ALADIN (...)
Article published on 9 May 2018
Section : Scientific plans and reports

DA coordinator position.

The 22nd ALADIN General Assembly approved the creation of a 20% DA coordinator position in ALADIN to assist the ALADIN PM and the CSSI : with the coordination of the ALADIN DA starter countries with their DA activities; with the coordination of the basic kit DA core (...)










Short history of the project
Article published on 21 August 2002
by Patricia by

Only the main events are mentioned here, relative to the political, financial and technical aspects.

  • November 1990 : Météo-France offers the NMSs of Bulgaria, the Czech Republic, Hungary, Poland, Romania and Slovakia to jointly develop and maintain a LAM version of the ARPEGE system, with a view to a mutually beneficial collaboration in NWP and mesoscale modelling.
  • January 1991 : The so-called MICECO support (from the French Ministry of Foreign Affairs for the visits to Toulouse of the specialists of the partner NMSs) that will be the continuous and main source of financing during the first years of the project is acquired.
  • March 1991 : In Paris, three scientists from the NMSs of the Czech Republic, Hungary and Romania develop the feasibility study of the proposed common project.
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    Vlad (Ro), Radmila (Cz), Jean-François (Fr), Dezso (Hu)

  • September 1991 : Start of the active phase of the project in Toulouse : Slovakia declines the offer to participate but, meanwhile, Austria, through what will be the RC-LACE endeavour, joins in. Thus, 17 people from seven countries start to work on the project LAM-ARPEGE (that will be renamed ALADIN one month later). A "cahier des charges" for the ALADIN project is established.
  • March 1992 : First scientifical report on the "ALADIN" current work and on its perspectives.
  • August 1992 : The French Ministry for Research accepts to finance four Ph.D grants in the framework of the ALADIN project. These would allow the scope of the project to be enlarged by studying basic questions related to its usefulness and further evolution.
  • October 1992 : Cycle 0 of the ALADIN library is declared.
  • January 1993 : The Commission of the European Communities selects the pre-operational work on ALADIN as one of the subjects financed under the so-called PECO action, in a competitive context (1 over 35).
  • November 1993 : The NMSs of Morocco, Slovakia and Slovenia join the project. The nine partners carry on the efforts towards a first quasi-operational implementation in Toulouse for the benefit of the central and eastern European NMSs.
  • May 1994 : The work of the seven members of the PECO-financed pre-operational team (with the additional contributions of the Ph.D. students and an established team of Météo-France scientists) leads to a successful conclusion. ALADIN becomes quasi-operational on Météo-France’s C98 computer on 31 May (other important event on 31 May). Although the application is run only once a day (in sequential mode with respect to ARPEGE), up to 36 hours only and without a specific data-assimilation cycle, proof of the wisdom of the concept is nevertheless at hand. The scientific status of this first quasi-operational version of ALADIN was presented during the second meeting of the LACE steering committee (Bratislava, 29-30/06/94)
  • April 1995 : The NMSs of Croatia and Spain (the latter will later leave) join the project.
  • December 1995 : A workstation version is built (still in dead-branch mode with respect to the development cycles) by the SELAM group (NMSs of Bulgaria and Romania). This work also prepares the way for the distributed-memory version of ALADIN foreseen for cycles 6 and 7 of the library.
  • January 1996 : RC-LACE and Météo-France sign an agreements to use the J916/12 computer in Toulouse as host for an ALADIN-LACE pre-operational application from 1 July 1996 to 31 December 1997 in order to provide a transition for the build-up of the central European joint application of ALADIN between the six contributing NMSs.
  • February 1996 : The success of the first Ph.D. phase (two theses already defended and two about to be defended) leads the French Ministry for Research to renew the grant. Five new Ph.Ds are thus in the pipeline.
  • March-August 1996 : In a form of cascade, the four applications start their cycle of pre-operational to operational status : ALADIN-MAROC and ALADIN-FRANCE (in March), ALADIN-LACE in Toulouse (in July), ALADIN-ROMANIA (in August).
  • October 1996 : The NMS of Belgium join the project .
  • November 1996 : In Paris, during the 1st Assembly of ALADIN Partners, the Directors of the ALADIN partner NMSs sign a Memorandum of Understanding (MoU) that formalizes and regulates the further progress of the project, in the presence of the Secretary-General of WMO, Prof. G.O.P. Obasi, and the French Ministery of Transports, Mr. B. Pons.
  • February 1997 : A quasi-operational status is given to ALADIN/SLOVENIA model.
  • March 1997 : The Czech NMS launches a computer ITT with the aim of transferring the central European application from Toulouse.
  • April 1997 : The NMS of Portugal join the project.
  • July 1997 : NEC supercomputer is chosen for the ALADIN-LACE application in Prague.
  • October 1997 : The Aladin WOrkstation Coordination group is created with main topics the portability of the ALADIN code on different platforms and the problems linked to the operational implementations.
  • November 1997: After nearly one year work, ALADIN-BELGIUM is fully operational.
  • February-March 1998 : The workstation version ALADIN/HUNGARY is put into quasi-operational regime and every day ALADIN-POLAND runs are completed in Cracow.
  • March 1998 : The former surface parametrization is replaced by a more realistic one ("ISBA"). Besides its scientific aspects, this change is a real challenge as it needs a simultaneous switch in the ARPEGE suite and in all the operational or pre-operational ALADIN suites.
  • April 1998 : The Hydrometeo Service of Moldova joins the project.
  • June 1998 : ALADIN-LACE quits Toulouse and starts its new life in Prague and ALADIN-FRANCE moves to the Futjitsu VPP and became fully operational on that occasion.
  • November 1998 : A new version of the MoU is accepted during the 3rd Assembly of Partners that mainly precises the access to the ALADIN code (in relation with the agreement between ECMWF and Météo-France for the access and the use of ARPEGE/IFS). A 3-headed team is created to coordinate the exchanges and collect proposals about the second medium term 1999-2001 research plan for ALADIN.
  • Last quarter of 1998 : The workstation versions ALADIN/AUSTRIA, ALADIN/BULGARIA, ALADIN/PORTUGAL and ALADIN/SLOVAKIA go in pre-operational mode.
  • From March 1999 to May 1999 : ALADIN/POLAND, ALADIN/AUSTRIA, ALADIN/SLOVAKIA and ALADIN/BULGARIA become operational
  • March 2000 : Start of the EU-financed Research Training Network named ALATNET : this network, relying on five ALADIN centers (Belgium, Czech Republic, France, Hungary and Slovenia), is aiming at a widened spectrum of activities for the whole project.
  • April 2000 : ALADIN/PORTUGAL runs operationaly
  • October 2000 : ALADIN-CROATIA reaches a pre-operational status
  • 31 May 2001 :
    • the second ALADIN Memorandum of Understanding is signed by 15 Partners on May 31st; main changes are an enlarged definition of the ALADIN partnership, more precise guidelines for the commercial use of ALADIN products, stricter rules for the registration of the manpower dedicated to ALADIN and the creation of a Technical Cooperation Standing Committee (TCSC) of four members in charge of the routine project coordination.
    • The Institut National de Météorologie of Tunisia joins the project.
    • ALADIN has its booklet !
    • The ALADIN 10-years anniversary is celebrated in Paris : a great day ...
  • September 2001 : ALADIN/TUNISIA runs pre-operationaly in Toulouse
  • January 2002 : African Centre of Meteorological Applications for Development (ACMAD) stressed its wish to be somehow associated to the ALADIN consortium. This was disscused on 6th Assembly of ALADIN Partners, where also the Third Medium Term Reasearch Plan (2002-2004) was proposed. A group of Coordinators for Scientfic and Strategic Issues (CSSI) was established which has a permanent core of six persons.
  • March 2002 : ALADIN-CROATIA runs operationaly.
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