In this paper we report the use of a microwave link network to perform the reconstruction of space-time rainfall field distribution over a limited area at ground level. This is possible through the use of a real time tomographic technique which makes use of the relations between the rainfall intensities and the attenuation measured on the links. Here we show how a commercial network operating at K band, located in Italy and managed by a broadband Internet provider, can be suitable to achieve accurate rainfall maps. The results of the adopted technique are successfully validated exploiting rain accumulations measured by a traditional gauge network.