 In 1985, DMI together with other national weather services in Nordic countries and the Netherland, Ireland and Spain to form a research collaboration around HIgh Resolution Limited Area Model (HIRLAM) for weather forecasting.The cross-country research collaboration on limited area Numerical Weather Prediction (NWP) is the first of its kind in the world, which resulted in successful operational implementation of state of art short range regional weather forecast model in Denmark and other member services of HIRLAM.Since 2004, HIRLAM entered a research collaboration with the ALADIN consortia lead by Meteo France in joint research and development for the mesoscale, nonhydrostatic forecast system AROME.