Wireless Emergency Alerts (WEA) are emergency messages sent by authorized government alerting authorities through your mobile carrier. Yes, if you have a WEA-capable phone and your wireless carrier participates in the program. 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). 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. Yes, if you have a WEA-capable phone and your wireless carrier participates in the program. 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.
You can opt-out of receiving WEA messages for imminent threats and AMBER alerts, but not for Presidential messages.


The Extreme alerts from the National Weather Service include warnings for tsunamis, tornadoes, extreme winds, hurricanes and typhoons. FEMA has produced Public Service Announcements that demonstrate how wireless alerts save lives. The NWS pushes our suite of warnings, advisories, and watches to a national collection pointcalled 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. SAN DIEGO – County and law enforcement officials announced Monday they will use the federal Wireless Emergency Alert system to send information to cellular phones. The Wireless Emergency Alert system is a new way the county plans to notify residents in an emergency, and it’s critical that people understand the system so they can respond appropriately to protect themselves when they receive an alerts on their phones. Gore said the alerts will be vital during natural disasters, especially with evacuations — and peak fire season is just ahead.
The cell alerts will be 90-character messages with basic information and instructions for people in harm’s way.
The first county-wide alert was last month — when an Amber Alert was issued in the Hannah Anderson abduction case.
Last we heard of the federal government's Wireless Emergency Alert system, only Sprint had signed on to deliver the SMS warnings. The current (2012) software program isn't capable of narrowing down the alert for just those cell phones located within the polygon warning. 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.


WEA use radio technology to broadcast the alert from cell towers to mobile devices in the area of the threat.
The Severe alerts from National Weather Service include warnings for flash floods and dust storms. 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.
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. 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. 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. Using a "point-to-multipoint system" that targets at-risk subscribers, the National Weather Service, FEMA, FCC and Department of Homeland Security-backed initiative works by sending location-based messages of 90 characters or less to nearby handsets in the event of an imminent meteorological threat. The mostly opt-out service will also accommodate AMBER and Presidential alerts, although you won't have that flexibility for missives sent from our head of state.



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