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Outdoor Public Warning System

This project, started in Fall 2004 and to be completed in July 2021, aims to replace the old 1940’s mechanical system with 65 sirens covering San Francisco, TI, and YBI. The electronic, battery, and/or solar-powered system includes public address capability, customizable coverage, and a community education program. It also addresses tsunami risk with a comprehensive operational process.

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Outdoor Public Warning System

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  1. Outdoor Public Warning System

  2. Project AnnouncementConference: Nov. 9, 2004

  3. Project started Fall of 2004, will be completed in July $ 2.1 M cost Replacement for the old 1940’s mechanical system 65 sirens cover San Francisco, TI, YBI Electronic, battery and/or solar powered Public address (voice) capability Outdoor Public Warning System Click icon to play tone

  4. Customized Coverage • The siren system can be sub-divided into zones to customize coverage • Police and fire personnel can activate voice feature at one or more locations, based on situation • Two portable systems allow quick relocationof the control point

  5. Community Education Program • Multiple strategies: • Advertising campaign using external and internal signs in buses and bus shelters • Brochure • Outreach to City/County employees & families • 72 hours.org website • Presentations at community forums • Weekly test (noon on Tuesday) • Tri-Lingual educational material

  6. Bus Signage

  7. English

  8. Chinese

  9. Spanish

  10. San Francisco’s Tsunami Run-up Zone Map provided by State OES For evacuation planning purposes only Intended as a worst case scenario

  11. San Francisco Tsunami Risk • Approximately 48 blocks could be impacted by a significant tsunami • A distant event may offer up to several hours of warning, a trigger event off the California Coast would provide very limited warning • Primary outdoor notification system controls located at the Emergency Communications Department - 911 Dispatch Center

  12. TsunamiWarning/Watch Information CLERS Palmer Center Issues Watch/Warning State OES Issues Warning EDIS Disaster Occurs Operational Areas CALWAS NWS OES Region OES Op. Area Call-down NOAA Radio Alert

  13. System Activation Process(Internal) EAS & EDIS message issued for CCSF OES Requests ECD trigger system ECD receives: CALWAS EDIS CLERS NOAA OES Duty Officer Notified (also by NOAA & EDIS) Notification begins OES Director Consulted CCSF Policy Group advised

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