Weather radios generally fall into two categories: professional-grade devices designed to automatically receive weather warning signals, and emergency radios equipped with AM/FM and NOAA weather bands. The latter serve as standard radios for daily use but rely on solar power or hand-crank generation during disasters.
The domestic weather warning radio was jointly developed by the Inner Mongolia Meteorological Bureau and the Chinese Academy of Sciences; first deployed in Inner Mongolia in 2011, it was the first of its kind in China. Its core capabilities include automatically switching to the warning broadcast the moment a weather station issues an alert-regardless of the channel currently being listened to-and automatically powering on to receive signals even when turned off. It also supports targeted broadcasts based on regional codes and features automatic recording and playback. It offers three power options-disposable batteries, 220V mains charging, and hand-crank generation-and can also function as a flashlight. Currently, these radios have been deployed in various domestic provinces and cities as well as overseas; notably, 500 units were provided for emergency relief during the Ya'an earthquake.
The US-version NOAA weather radio operates on the National Weather Service's nationwide broadcast network, providing 24-hour official weather warnings and disaster information. Covering all 50 US states, it utilizes seven VHF frequencies ranging from 162.400 MHz to 162.550 MHz and requires a dedicated receiver to pick up the signal.
Classification of Weather Radios
