Wireless Emergency Alerts (WEA) are emergency messages sent by authorized government alerting authorities through your mobile carrier.
If you travel into a threat area after an alert is first sent, your WEA-capable device will receive the message when you enter the area.
These alerts are not meant to replace other, more detailed sources of weather information, including NOAA Weather Radio, cell phone apps, local media, and the internet.
You can opt-out of receiving WEA messages for imminent threats and AMBER alerts, but not for Presidential messages. Your cell phone will pick up the tornado warning alert since it was issued for a part of the county you are located in (only county code is used - all or nothing).
While it's a little later than expected, the free SMS emergency notification system has now gone live. With a unique sound and vibration, Wireless Emergency Alerts keep you in the know, wherever you are.
Wireless Emergency Alerts (WEA) are emergency messages sent by authorized government alerting authorities through your mobile carrier. If you travel into a threat area after an alert is first sent, your WEA-capable device will receive the message when you enter the area. The Extreme alerts from the National Weather Service include warnings for tsunamis, tornadoes, extreme winds, hurricanes and typhoons. The graphic below shows how to set your iPhone Notifications to receive emergency alerts from government agencies. Government partners include local and state public safety agencies, FEMA, the FCC, the Department of Homeland Security, and the National Weather Service.


With WEA, alerts can be sent to your mobile device when you may be in harm's way, without need to download an app or subscribe to a service. Other sources include NOAA Weather Radio, news media coverage, the Emergency Alert System on radio and TV broadcasts, desktop applications, mobile applications, and other alerting methods offered by local and state public safety agencies. America’s wireless industry is helping to build a Weather-Ready Nation through a nationwide text emergency alert system, called Wireless Emergency Alerts (WEA), which will warn you when weather threatens. All kinds of radio frequencies estimates, and recognize danger for an emergency, but keep in mind. Emergency alert system scheduled to launchThe federal government and wireless phone service providers have built a system - called Commercial Mobile Alert System (CMAS) or Wireless Emergency Alerts (WEA) - that will send a text-like message to your phone.
Government partners include local and state public safety agencies, FEMA, the FCC, the Department of Homeland Security, and the National Weather Service.
The current (2012) software program isn't capable of narrowing down the alert for just those cell phones located within the polygon warning. Wireless Emergency Alert (WEA) messages will be delivered to cell towers in affected areas, which will then broadcast them to all compatible devices in their range.
You can opt-out of receiving WEA messages for imminent threats and AMBER alerts, but not for Presidential messages.
FEMA has produced Public Service Announcements that demonstrate how wireless alerts save lives.
WEA use radio technology to broadcast the alert from cell towers to mobile devices in the area of the threat. IPAWS also serves as collection point for non-weather alerts, such as civil and child abduction emergency messages which are issued by other emergency authorities.


Alerts are broadcast from cellular telephone towers in the threat area only (which for weather warnings will be the certain counties affected), and will activate all WEA-capable cell phones which are receiving a signal from these towers. While the system is looking to cover over 97 percent of the country, it's being gradually rolled out across carriers.
The NWS pushes our suite of warnings, advisories, and watches to a national collection point called the Integrated Public Alert and Warning System (IPAWS) The NWS specially marks our most critical NWS alerts for WEA distribution, so that when they reach IPAWS, they are pushed to commercial wireless carriers who broadcast the alert from cell towers in the threat area to your cell phone. The Severe alerts from National Weather Service include warnings for flash floods and dust storms.
Government’s emergency alert system was launched in May 2012, and this was the first alert to be sent out in NYC since the system launched.
Sprint and Verizon are both apparently ready for action and while we haven't heard about the status of T-Mobile or AT&T, the National Weather Service has stated that hundreds of smaller carriers haven't yet enabled the broadcasts. Therefore, an alert can reach cell phones outside of the actual warning area depending on the broadcast range of the cell towers which broadcast the alert. However, not all phones -- especially the more elderly bricks still in circulation -- will work with the system.




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