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How does the NWS activate a Wireless Emergency Alert on my cell phone? 

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. 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. Once an alert is in IPAWS, the alert may be made available through a variety of channels for further distribution, such as broadcast over television/radio stations, sirens, display on highway signs, desktop and mobile alert software application, and the Wireless Emergency Alert system.

WEA Factsheet (PDF) - Download a factsheet on Wireless Emergency Alerts.




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