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  • ShakeMaps of Peak Ground Acceleration (PGA, in units of %g), Peak Ground Velocity (PGV, in units of cm/s), and Pseudo-Spectral Acceleration (PSA, in units of %g). The KNMI publishes ShakeMaps for induced earthquakes with magnitude bigger than 2.0 in the province of Groningen. A ShakeMap is a representation of the actual ground shaking produced by an earthquake. The ShakeMap represents a combination of automatically recorded strong motion values, in the accelerometer stations around the epicenter of the earthquake, with the Ground Motion Prediction Equations (GMPE), for the places where there are no stations around. This GMPE is specially developed for Groningen (V7). More information about ShakeMaps can be found at: http://www.knmi.nl/kennis-en-datacentrum/achtergrond/shakemaps-voor-groningen

  • The TAF (Terminal Aerodrome Forecast) is a weather forecast for an aerodrome or airport. At KNMI, the TAF is produced for the civil airports of Amsterdam/Schiphol (EHAM), Rotterdam/The Hague Airport (EHRD), Groningen/Eelde (EHGG), Maastricht/Aachen (EHBK), Lelystad Airport (EHLE) and Bonaire International Airport (TNCB). A minimum of 4 TAFs per field are produced per day (24 hours). Minimal, because the TAF can be amended or corrected. The validity of the TAF is 30 hours. Additional information can be found in Appendix 5 on https://www.icao.int/airnavigation/IMP/Documents/Annex%203%20-%2075.pdf

  • A selection of near surface parameters of the KNMI HARMONIE-AROME Cy43 model for the Dutch domain. Every 3 hours 5 new files will be available, each with one parameter. The parameters are: wind speed at 10m, wind as a vector at 10m (both speed and direction), air temperature ar 2m, air pressure at MSL (mean sea level), total precipitation rate at 0m. The forecast time resolution is 1 hour, with a forecast horizon of 48 hours.

  • A selection of near surface parameters of the KNMI HARMONIE-AROME Cy40 model for the Caribbean domain. Every 3 hours 5 new files will be available, each with one parameter. The parameters are: wind speed at 10m, wind as a vector at 10m (both speed and direction), air temperature ar 2m, air pressure at MSL (mean sea level), total precipitation rate at 0m. The forecast time resolution is 1 hour, with a forecast horizon of 48 hours.

  • Current operational HARMONIE ensemble information in gridded form (regular lat-lon) of near surface and boundary layer (up to 300 m) parameters from the UWC-West HARMONIE-AROME Cy43 model. For this weather forecast model, KNMI works closely with Iceland, Denmark and Ireland on local short-term weather forecasts under the name "United Weather Centres-West" (UWC-West). An international project team is working on a joint Numerical Weather Prediction model (NWP), procurement and management of the HPC (supercomputer) and infrastructure. The output frequency is 1 hour. For more details and explanation of GRIB codes in HARMONIE, follow this link (NL): https://www.knmidata.nl/open-data/harmonie.

  • Rain gauge data from water board Hunze en Aa's, after quality control by KNMI. Raw data originating from a self-maintained network of rain gauges. Delivery of data is every 1-5 minutes.

  • Rain gauge data from water board Hoogheemraadschap De Stichtse Rijnlanden (HDSR), after quality control by KNMI. Raw data originating from a self-maintained network of rain gauges. Delivery of data is every 1-5 minutes.

  • Reforecast of operational HARMONIE ensemble information in gridded form (regular lat-lon) of near surface and boundary layer (up to 300 m) parameters from the UWC-West HARMONIE-AROME Cy43 model. For this weather forecast model, KNMI works closely with Iceland, Denmark and Ireland on local short-term weather forecasts under the name "United Weather Centres-West" (UWC-West). An international project team is working on a joint Numerical Weather Prediction model (NWP), procurement and management of the HPC (supercomputer) and infrastructure. The output frequency is 1 hour. For more details and explanation of GRIB codes in HARMONIE, follow this link (NL): https://www.knmidata.nl/open-data/harmonie.

  • This dataset consists of navigational data from hot-air balloon flights and are a potential source of wind data in the atmospheric boundary layer. The data is provided on voluntary basis by professional balloonists. The dataset was compiled for the PhD thesis with DOI: 10.18174/589639. The PhD thesis is about the application of hot air balloon tracks as a potential source of wind data in the lower kilometer of the atmosphere. Balloon flights from the archives of balloonists were studied and interesting wind patterns were explained with respect to their meteorological background. The motion of a hot air balloon was studied as well as the inertia of the balloon after changing winds. A field experiment was conducted in the Netherlands to collect data using a smartphone app, which was used to determine balloon wind data. Verification with the 200m high Cabauw tower measurements yielded positive results. Balloon dynamics were studied with an accurate wind meter mounted under the balloon basket. Next, verification and impact studies were performed with two weather models to demonstrate the applicability of the hot air balloon wind data.

  • This dataset contains horizontally averaged statistics from unvalidated Dutch Atmospheric Large Eddy Simulation (DALES) forecasts with a lead time of 24h. The LES is ran using the Ruisdael branch of DALES (version 4.3) and are forced by HARMONIE 43. The domain with a horizontal extent of 15 km x 15 km and vertical range of 13.5 km is centred around Cabauw. The version of the unvalidated Ruisdael DALES can be accessed here: https://github.com/dalesteam/dales. The runs have a horizontal resolution of ~76m (in both directions) and a vertical resolution decreasing with height from 20 m to 150 m. Homogenous land cover is applied to the domain. Code can be accessed through: https://github.com/dalesteam/dales.