The allocated frequencies are:
If your radio is equipped with S.A.M.E (Specific Area Message Encoding) – you can cause your radio to filter the alerts presented. This is useful, for example, so that a tornado ‘watch’ does not wake you up, nor does a tornado ‘warning’ in some other nearby county – but a tornado ‘warning’ for your county does alarm. Very useful.
For full details on the system – please see the following link.