Collecting and utilising crowdsourced data for numerical weather prediction: Propositions from the meeting held in Copenhagen, 4–5 December 2018 oleh Kasper S. Hintz, Katharine O'Boyle, Sarah L. Dance, Saja Al‐Ali, Ivar Ansper, Dick Blaauboer, Matthew Clark, Alexander Cress, Mohamed Dahoui, Rónán Darcy, Juhana Hyrkkanen, Lars Isaksen, Eigil Kaas, Ulrik S. Korsholm, Marion Lavanant, Gwenaelle Le Bloa, Emilie Mallet, Callie McNicholas, Jeanette Onvlee‐Hooimeijer, Bent Sass, Valeria Siirand, Henrik Vedel, Joanne A. Waller, Xiaohua Yang