The project takes as starting point Brussels' 145 m high Dexia Tower, from which 4200 windows can be individually color-enlightened by RGB-led bars. The weather.tower project forecasts tomorrow's weather for Brussels, in collaboration with the Royal Meteorological Institute of Belgium.

The project displays tomorrow's temperature, cloudiness, precipitations, and wind, by using colors and geometrical patterns to visualize/transcribe these real-time provided data by the RMI.

The resulting geometric play of colours and shapes mirrors tomorrows 'sky' condition in form of agitation and brightness (light). The transcription of common data into light establishes the tower as an urban landmark, a common sign.