These warnings are also relayed to local emergency management and public safety officials who can activate local warning systems to alert communities. The NOAA Weather Radio network has more than 480 stations in the 50 states and in Puerto Rico, the U.S. Virgin Islands and U.S. Pacific Territories. National Weather Service forecasters provide routine weather programming all the time to help you plan. The radios also send out a special alarm tone to alert you to a life-threatening situation. This is important because sometimes weather can turn deadly very fast.
Tornadoes are the best example.
At that time many houses have a radio or TV on. These are excellent sources for severe weather information. Tornadoes may strike when people are sleeping or unaware of the forecast. With the NOAA Weather Radio, you will be alerted to dangerous weather with time to take shelter. NOAA Weather Radio broadcasts more than just warnings about natural hazards.