d2f17c60-7e1b-4bc9-b93d-d1b1d6205f24 Koninklijk Nederlands Meteorologisch Instituut (KNMI) Koninklijk Nederlands Meteorologisch Instituut (KNMI) Koninklijk Nederlands Meteorologisch Instituut (KNMI) opendata@knmi.nl opendata@knmi.nl 2026-06-02T08:23:29.73689Z ISO 19115 ISO 19115:2003 NL Kernset 1.3 KNMI 2.1.0 http://www.opengis.net/def/crs/EPSG/0/4326 http://www.opengis.net/def/crs/EPSG/0/4326 EURADCLIM: The European climatological gauge-adjusted radar precipitation dataset (24-h accumulations) EURADCLIM: The European climatological gauge-adjusted radar precipitation dataset (24-h accumulations) EURADCLIM: De Europese klimatologische radarneerslagdataset (24-uursommen) 2025-10-06 3.0 urn:xkdc:ds:nl.knmi::RAD_OPERA_24H_RAINFALL_ACCUMULATION_EURADCLIM/3.0/ The European climatological gauge-adjusted radar precipitation dataset, EURADCLIM, addresses the need for an accurate (sub-)daily precipitation product covering 8000000 square kilometers of Europe at high spatial resolution. It consists of 1-h and 24-h precipitation accumulations (every clock-hour) at a 2-km grid for the period 2013 through 2023. It is based on the European Meteorological Network (EUMETNET) Operational Program on the Exchange of weather RAdar Information (OPERA) gridded radar dataset of 15-min instantaneous surface rain rates. For EURADCLIM, first methods have been applied to further remove non-meteorological echoes from these images by applying two statistical methods and a satellite-based cloud type mask. Second, the radar composites are merged with the rain gauge data from the European Climate Assessment & Dataset (ECA&D) in order to substantially improve its quality. We expect to rerun EURADCLIM once a year over the entire period, using all available ECA&D rain gauge data, and extend it with one year of data. This will result in a new version of this dataset. Project EURADCLIM was financed by KNMI's multi-annual strategic research programme (project number 2017.02). The EURADCLIM dataset is based on the OPERA surface radar rain rate and daily precipitation sums of the rain gauge networks provided by the European national weather services and other data holding institutes, through ECA&D. EURADCLIM version 3 changes with respect to version 1: * 15-min rain rates over 150 mm/h are deemed outliers and set to 0 mm/h. * More local weighting is applied in the merging of radar and rain gauge data: the first adjustment step (only long range component) stayed the same with respect to EURADCLIM versions 1 & 2, but the second adjustment step is now more local. * The 1-h EURADCLIM accumulations, from which the 24-h accumulations are derived, are capped at 300 mm. * Much better rain gauge coverage above Spain. * Years 2021, 2022, 2023 have been added (and 2023 w.r.t. version 2). Usage: For each month a zip file is provided. The data are in UTC, where the time in the unzipped filenames is the end time of observation in UTC. Object "dataset1/data1" contains the 24-h precipitation accumulation in millimeters. For a given grid cell, it is equal to the "nodata" value (-9999000.0) in case data availability of the underlying 1-h accumulations is < 83.3%. Object "dataset2/dataset1" contains the number of valid values for each radar grid cell (count), i.e., the number of underlying 1-h accumulations that have been used. The European climatological gauge-adjusted radar precipitation dataset, EURADCLIM, addresses the need for an accurate (sub-)daily precipitation product covering 8000000 square kilometers of Europe at high spatial resolution. It consists of 1-h and 24-h precipitation accumulations (every clock-hour) at a 2-km grid for the period 2013 through 2023. It is based on the European Meteorological Network (EUMETNET) Operational Program on the Exchange of weather RAdar Information (OPERA) gridded radar dataset of 15-min instantaneous surface rain rates. For EURADCLIM, first methods have been applied to further remove non-meteorological echoes from these images by applying two statistical methods and a satellite-based cloud type mask. Second, the radar composites are merged with the rain gauge data from the European Climate Assessment & Dataset (ECA&D) in order to substantially improve its quality. We expect to rerun EURADCLIM once a year over the entire period, using all available ECA&D rain gauge data, and extend it with one year of data. This will result in a new version of this dataset. Project EURADCLIM was financed by KNMI's multi-annual strategic research programme (project number 2017.02). The EURADCLIM dataset is based on the OPERA surface radar rain rate and daily precipitation sums of the rain gauge networks provided by the European national weather services and other data holding institutes, through ECA&D. EURADCLIM version 3 changes with respect to version 1: * 15-min rain rates over 150 mm/h are deemed outliers and set to 0 mm/h. * More local weighting is applied in the merging of radar and rain gauge data: the first adjustment step (only long range component) stayed the same with respect to EURADCLIM versions 1 & 2, but the second adjustment step is now more local. * The 1-h EURADCLIM accumulations, from which the 24-h accumulations are derived, are capped at 300 mm. * Much better rain gauge coverage above Spain. * Years 2021, 2022, 2023 have been added (and 2023 w.r.t. version 2). Usage: For each month a zip file is provided. The data are in UTC, where the time in the unzipped filenames is the end time of observation in UTC. Object "dataset1/data1" contains the 24-h precipitation accumulation in millimeters. For a given grid cell, it is equal to the "nodata" value (-9999000.0) in case data availability of the underlying 1-h accumulations is < 83.3%. Object "dataset2/dataset1" contains the number of valid values for each radar grid cell (count), i.e., the number of underlying 1-h accumulations that have been used. De Europese klimatologische radarneerslagdataset, EURADCLIM, beantwoord aan de behoefte aan een nauwkeurig (sub)dagelijks neerslagproduct die 8000000 vierkante kilometer van Europa bestrijkt met een hoge ruimtelijke resolutie. Het bestaat uit 1- en 24-uur neerslagaccumulaties (elk klokuur) op een 2 km grid over de periode 2013 tot en met 2023. Het is gebaseerd op de regenintensiteitsbeelden van het European Meteorological Network (EUMETNET) Operational Program on the Exchange of weather RAdar Information (OPERA). Voor EURADCLIM zijn eerst methoden toegepast om niet-meteorologische echo's verder te verwijderen uit deze beelden. Namelijk, twee statistische methoden en een wolkentypemasker van een satellietproduct. Om de kwaliteit substantieel te verhogen, zijn de beelden daarna gecombineerd met regenmeterdata van de European Climate Assessment & Dataset (ECA&D). We verwachten EURADCLIM eenmaal per jaar opnieuw te draaien over de gehele periode, met alle dan beschikbare ECA&D regenmeterdata, en uit te breiden met een jaar data. Dan zal een nieuwe versie van de dataset worden aangemaakt. Project EURADCLIM is gefinancierd door KNMI's Meerjarig Strategisch Onderzoek (projectnummer 2017.02). De EURADCLIM dataset is gebaseerd op de OPERA radarregenintensiteit en de dagelijkse neerslagsommen uit de netwerken van regenmeters die ter beschikking zijn gesteld door de Europese nationale weerdiensten en andere dataleveranciers, via ECA&D. Wijzigingen in EURADCLIM versie 3 ten opzichte van versie 1: * Neerslaghoeveelheden van meer dan 150 mm/u gedurende 15 minuten worden ingesteld op 0 mm/u. * Er wordt meer lokale weging toegepast bij het samenvoegen van radar- en regenmetergegevens: de eerste aanpassingsstap (alleen langeafstandscomponent) is hetzelfde gebleven ten opzichte van EURADCLIM versies 1 en 2, maar de tweede aanpassingsstap is nu meer lokaal. * De 1-uurs EURADCLIM-accumulaties, waaruit de 24-uurs accumulaties worden afgeleid, zijn begrensd op 300 mm. * Veel betere regenmeterdekking boven Spanje. * De jaren 2021, 2022 en 2023 zijn toegevoegd (en 2023 ten opzichte van versie 2). Gebruik: Voor elke maand wordt een zip-bestand meegeleverd. De gegevens zijn in UTC, waarbij de tijd in de uitgepakte bestandsnamen de eindtijd van de waarneming in UTC is. Object "dataset1/data1" bevat de 24-uurs neerslaghoeveelheid in millimeters. Voor een gegeven rastercel is deze gelijk aan de waarde voor de "nodata" (-9999000,0) indien de beschikbaarheid van de onderliggende 1-uurs accumulaties < 83,3% is. Het object "dataset2/dataset1" bevat het aantal geldige waarden voor elk rastercel (count), d.w.z. het aantal onderliggende 1-uurs accumulaties dat gebruikt is Koninklijk Nederlands Meteorologisch Instituut (KNMI) Koninklijk Nederlands Meteorologisch Instituut (KNMI) Koninklijk Nederlands Meteorologisch Instituut (KNMI) opendata@knmi.nl opendata@knmi.nl Precipitation Precipitation Neerslag Rain Rain Regen Radar Radar Radar Climate Climate Klimaat ECA&D ECA&D ECA&D Gauge Gauge Regenmeter DG Discovery Properties Vocabulary 1.0 DG Discovery Properties Vocabulary 1.0 2013-01-01 Open data Open data Open data No use limitations No use limitations Geen gebruiksbeperkingen https://creativecommons.org/licenses/by/4.0/deed.nl https://creativecommons.org/licenses/by/4.0/deed.nl climatologyMeteorologyAtmosphere -40 58 32 68 2013-01-01 2023-12-31 Data description paper (version 1): https://doi.org/10.5194/essd-15-1441-2023 More information on the KNMI Open Source radar repository: https://gitlab.com/KNMI-OSS/radar/datasets Data description paper (version 1): https://doi.org/10.5194/essd-15-1441-2023 More information on the KNMI Open Source radar repository: https://gitlab.com/KNMI-OSS/radar/datasets Data description paper (versie 1): https://doi.org/10.5194/essd-15-1441-2023 Meer informatie op de KNMI Open Source radar repository: https://gitlab.com/KNMI-OSS/radar/datasets HDF5 HDF5 2.0 ODIM-HDF5 Koninklijk Nederlands Meteorologisch Instituut (KNMI) Koninklijk Nederlands Meteorologisch Instituut (KNMI) Koninklijk Nederlands Meteorologisch Instituut (KNMI) opendata@knmi.nl opendata@knmi.nl 3400 https://dataplatform.knmi.nl/catalog/datasets/index.html?x-dataset=RAD_OPERA_24H_RAINFALL_ACCUMULATION_EURADCLIM&x-dataset-version=3.0 landingpage KNMI Data Platform KNMI Data Platform OPERA surface radar rain rate + ECA&D rain gauge data OPERA surface radar rain rate + ECA&D rain gauge data OPERA radarregenintensiteit + ECA&D regenmeterdata