Also called as weather surveillance radar (WSR) or Doppler weather radar, Weather radar, are the ones that are used to locate precipitation, calculate its motion, and estimate its type (rain, snow, hail etc. weather radars that are manufactured nowadays are mostly pulse-Doppler radars. These weather radars are capable of detecting rain droplets motions. They are also capable of measuring the intensity of the precipitation. These types of data can be used to determine the structure of storms and their potential to cause severe weather. Radar operators during World war II noticed that weather parameters were causing echoes in the signals appearing on their screen, which masked potential enemy targets. Techniques were developed to filter these anomalies. This led scientists to study the phenomenon. Soon after, many radars were used to detect precipitation. Weather radars since then have evolved and are now used by national weather services, research departments in universities, and television newscasts. Specialized software can take radar data and make short term forecasts of future positions and intensities of rain, snow, hail, and other weather phenomena. Radar output is even incorporated into numerical weather prediction models to improve analyses and forecasts. Weather radars use microwave radiation as their source of propagation.

Collecting data manually can get tedious. It gets more challenging when you have to collect and report weather data of greater area (such as states or counties when compared to a small town or a city) to a central location which will be broadcasted for the residents of those locations. Automated weather stations were developed for this sole purpose. Auto weather systems are intended to save labor or collect data from a remote location. they have wireless communications as their integral part as they send recorded weather data through mobile or satellite technology. The automatic weather system may or may not report real time data depending on whether or not it has Argos system or global positioning system. They have the facility of saving the data for later recovery. Automatic weather systems are normally installed on electricity poles or masts (these arrangements generally measure wind speed or the level of solar radiation). The components of an automatic weather system is the Data logger. It logs the data for future references. The main function of a data loggers is, measuring and storing the information from every sensor. Calculating the data (such as minimum, maximum and average). A data logger can store the data in its own memory or an external memory (maybe a SD card).