Deprecation

This dataset has been deprecated since October 5, 2026 and will no longer receive updates per December 1, 2026.
Please read the deprecation notice of this dataset for how to proceed.

The newest version of this dataset can be found at: https://dataplatform.knmi.nl/dataset/radar-forecast-2-0

Abstract

Forecasts of radar reflectivities at 1500 m over the Netherlands and surrounding area measured by two radars in Herwijnen and Den Helder. Forecast interval is 5 minutes, with lead times up to 2 hours.

This dataset is based on a very basic reflectivity composite. For a more advanced precipitation nowcast please use this dataset: https://dataplatform.knmi.nl/dataset/radar-forecast-2-0


Metadata

Dataset name radar_forecast
Dataset version 1.0
Status onGoing
Update frequency continual
File formats HDF5
Spatial representation type grid
License https://creativecommons.org/licenses/by/4.0/
North bound latitude 55.97
East bound longitude 10.86
South bound latitude 48.9
West bound longitude 0.0
Dataset edition 2
Dataset manager KNMI Radarteam
Maintainer KNMI Data Services
Publication date 2014-12-01
Reference system identifier PROJ.4+proj=stere +lat_0=90 +lon_0=0 +lat_ts=60 +a=6378.14 +b=6356.75 +x_0=0 y_0=0
Dataset start time 2008-01-01
Dataset end time 9999-12-31
Identifier urn:xkdc:ds:nl.knmi::radar_forecast/1.0/
Lineage statement Radar reflectivities are measured by both radars (Herwijnen at 51,8369 N, 5,1381 E and Den Helder at 52.9533 N, 4.7900 E) in scans with elevation angles of 0.3, 1.1, 2.0, and 3.0 degrees. These scans are used to generate a single image per radar at 1500 m by linearly interpolating radar reflectivities in altitude. These two radar images are then combined to a single image by taking a weighted average of the radar reflectivities. The weigths are a function of the distance of a given point to the radar. Radar reflectivity fields are forecast by extrapolating the current radar field using advection velocitite derived from previous radar reflectivity fields.
Use limitation No use limitations
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