NOAA Weather Radio (The National Oceanic and Atmospheric Administration) is a service provided by the United States Department of Commerce and can be received by radios that support the NOAA Band.
NOAA All Hazards Weather Radio (NWR) is a national network of transmitters that broadcast continuous weather information directly from National Weather Service Offices in your area. NWR broadcasts official Weather Service warnings, watches, forecasts and other hazard information 24 hours a day, 7 days a week.
Normal weather messages repeat every 5 minutes and are updated about every 2-3 hours (more frequently if conditions are developing). Regular broadcasts are tailored to weather information needs of people within the service area of the transmitter. For example, stations in coastal areas may receive information of interest to mariners. Other information, such as climate data and hydrological forecasts, may also be broadcast.
NWR works with the Federal Communication Commission's (FCC) Emergency Alert System making it your single source for "All Hazard", comprehensive weather and emergency information. In conjunction with Local, State, and Federal public officials and Emergency Managers, NWR also broadcasts warnings, alerts, and post-event information for all types of hazards – including earthquakes, wild fires, flash floods, thunderstorms, tornadoes, winter storms, tsunamis, avalanches, chemical releases, oil spills, and public safety alerts (such as AMBER alerts or 911 Telephone outages).
FEMA and the Department of Homeland Security recommend that all citizens have a radio that receives NOAA broadcasts in their emergency preparedness kit.