At 2pm, a great majority of the country’s breadwinners will be engaged in their breadwinning without access to radio or TV, satellite, cable or otherwise – as these are not maintained in most offices or conference rooms by employers.
These vectors of communication, while still necessary, are losing ground to, and for some people (my home) have been completely replaced by web enabled tools and media.
I suggest opt-in text and email notification in conjunction with registration to a specific region. Social media vectors (e.g. twitter & facebook) also make sense. I also suggest an Android and iPhone app be released with local location tracking checking to validate push messages.