NOAA Weather Radio

(NOTE: We have updated this article and re-published. Read the updated article here: USA Weather phenomena: Tornado )

NOAA WEATHER RADIO - receive warnings from the National Weather Service.
The National Weather Service continuously broadcasts updated weather warnings and forecasts that can be received by NOAA Weather Radios sold in many stores.
Alternatively you can start a search on the Internet with a phrase like: 'NOAA Weather Radios' or similiar. You will find online retailers.
The average price range is between 20 and 70 US-Dollars, with peaks of up to 200+ Dollars. 
Some manufacturers are: 

• Oregon Scientific
• Midland
• WeatherOne
• Maxon
• ShareCom
• Reecom

The average range is 40 miles, depending on topography. 
Your National Weather Service recommends purchasing a radio that has both a battery backup and a tone-alert feature which automatically alerts you when a watch or warning is issued.