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  • 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 gridded 50-member ensemble of precipitation forecasts that are created using a tree-based machine learning method, quantile regression forests, and inputs from the deterministic Harmonie-Arome (HA) forecasts. The target data set is rain-gauge-adjusted radar data that is upscaled by taking 3x3 km means and then a maximum is taken in a 7.5 x 7.5 km box. Inputs to the machine learning model include HA precipitation, and indices of atmospheric instability. Spatial and temporal dependencies are restored using the Schaake Shuffle. Forecasts are available during the extended summer period (mid-April to mid-October). Hourly forecasts are issued 4 times per day (00, 06, 12 en 18 UTC) for 48-hours into the future.

  • A SIGMET is a warning for (large) aviation that reports on (un)foreseen dangerous weather conditions and should therefore be treated with priority. The area for which the KNMI issues a SIGMET is the Amsterdam FIR, including the concession area in the North Sea (North Sea Area V) and above FL100. A SIGMET can be issued at any time. The validity period of a SIGMET is maximal 4 hours for a regular SIGMET and maximal 6 hours for a SIGMET for Volcanic Ash.

  • Warning for aviation reporting unforeseen dangerous weather conditions up to FL100 in the Amsterdam FIR, including the concession area in the North Sea (North Sea Area V). An AIRMET is issued maximal 1 hour before the expected phenomenon occurs. The validity period is standard 1 hour, maximal 4 hours.

  • Dutch weather warnings from KNMI. Current information about weather warnings in the Netherlands in respect to conditions of iciness and snow, rain, visibility, thunderstorm, gusts, heat stress, wind/water spouts. The warnings are issued up to 48 hours in advance. The data is published in two different formats: txt and xml.

  • 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.

  • Outlook weather forecast for the Netherlands for the upcoming 6 days. The data is published in three different formats: html, txt and xml.

  • General weather forecast for the Netherlands, presented as text. Forecast is for the current and upcoming day. The data is published in two different formats: txt and xml.

  • The warnings forecast covers the coastal waters around the Netherlands up to 30 nautical mile offshore and the greater inland waters. This area is divided into the following districts: Vlissingen, Zierikzee, Hoek van Holland, IJmuiden, Texel, Harlingen, Rottum, Delfzijl, IJsselmeer and Markermeer. The forecast contains wind warnings in force (≥6 Bft) and storm warnings. Visit https://www.knmi.nl/nederland-nu/weer/waarschuwingen-en-verwachtingen/warnings-coastal-waters-and-dutch-continental-shelf and https://www.knmi.nl/nederland-nu/maritiem/marifoon_uitleg for more information.