The National Weather Service ... and many watch messages are broadcast. The tone will activate all the receivers which are equipped to receive it, even if the audio is turned off.
The National Oceanic and Atmospheric ... but at first you can use the audio samples he points to. The actual broadcasts happen on one of seven frequencies between 162.400 MHz and 162.550 MHz ...
As a storm system that spawned deadly tornadoes across the South approaches the Big Bend, the NOAA Weather Radio is once again off the air.
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