This is especially useful for warnings which occur during the night when most people are asleep. The tone will activate all the receivers which are equipped to receive it, even if the audio is turned off. The National Weather Service will send a 1050 Hz tone alarm before most warning and many watch messages are broadcast. Residential Grade Radios and Features (in the U.S.) Tone alarm They are sold at most electronics stores, including Radio Shack and. You can purchase a basic weather radio for as little as $20.
There are many receiver options, however, ranging from handheld portable units which just pick up Weather Radio broadcasts, to desktop and console models which receive Weather Radio as well as other broadcasts. The broadcasts cannot be heard on a simple AM/FM radio receiver. NOAA Weather Radio All Hazards transmitters broadcast on one of seven VHF frequencies from 162.400 MHz to 162.550 MHz. Even city-wide tornado sirens are fallible - tornadoes have been known to tear down siren alert systems in their paths. Only a weather radio, which is equipped with a backup battery, is only the truly fool-proof way to get your severe weather warnings. You cannot rely on television programs to warn you of an approaching tornado when the power is out. The weather radio you buy can be set to silent until a warning of your choice occurs, at which point, it will alert you.
Weather radios are designed to broadcast special frequencies and alert owners of hazards. Having a NOAA Weather Radio in your home and workplace could save your life.
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