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  • 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.

  • 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

  • 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.

  • 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.

  • 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.

  • The North Sea shipping warnings cover the North Sea, divided into 5 districts: Dogger, German Bight, Humber, Thames and Dover. The warnings bulletin contains wind warnings in force (≥7 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/dutch-continental-shelf for more information.

  • Altitude wind forecasts spanning up to 200 meters, catering to multiple locations in the Netherlands and the North Sea region. It relies on inputs like wind direction, wind speed, and total cloud cover extracted from the Harmonie model, employing these parameters to calculate Pasquill stability classes. Output frquency is every 3 hours.

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

  • The Marifoon 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 Marifoon is issued four times a day and covers a period of 24 hours beginning at 00:00, 06:00, 12:00 and 18:00 UTC. The forecast contains wind warnings in force (≥6 Bft) and a forecast of: general synopsis, average wind direction and force, wind gusts (if  ≥ 10 knots above average wind), weather and visibility for the districts mentioned above. For the time indication, "first" or "soon" are used for a change in the weather in the first 4 hours of the time block, "later" is used to indicate a change in the last 4 hours. Visit https://www.knmi.nl/nederland-nu/maritiem/marifoon_uitleg for more information. The data is published in two different formats: txt and xml.