In this paper, the authors describe designing of a system with the help of the sensors to detect the rainfall intensity parameters. The satellite systems are sufficient for weather broadcasting and giving their valuable measurements. But these measurements are based on the wide area observations. Some authors presented the system design with help of WSN technology for early warning detection of the heavy rainfall and giving alert to the people. These measurements are used to find out the rainfall situation in the nearest area. But these system hardware was mounted on the towers, base station, building and can be measure the data up to the fixed particular range.