vejrradar

Vejrradar is a Danish online weather radar service that provides near real-time imagery of precipitation across Denmark. It is operated by the Danish Meteorological Institute (DMI) and forms part of Denmark’s public weather information system.

The service collects data from a network of weather radars and processes it into color-coded radar mosaics showing reflectivity and estimated precipitation rates. The maps are updated at short intervals and can be used to assess current precipitation intensity and short-term development, supporting nowcasting and immediate planning for activities and travel.

Vejrradar is publicly accessible and widely used by the Danish public, media, and authorities for weather awareness, planning outdoor events, and managing rain-related risks. Data from the radar imagery is typically integrated with weather forecasts and other observational sources to provide a coherent picture of current conditions and near-future precipitation.

Behind Vejrradar is Denmark’s national radar network, with multiple radar installations that cover the country and surrounding regions. The radar measurements are calibrated and, where appropriate, merged with rain gauge data and satellite observations to improve accuracy and reliability.

Limitations exist in radar-based precipitation estimates. Factors such as distance from the radar, terrain, and technical artifacts can affect accuracy, leading to under- or overestimation in some areas. Radar data is thus used in conjunction with other meteorological observations and forecasts to provide the most reliable picture of weather conditions.