Washington State Military DepartmentPublic view layer for the All-hazard Alert Broadcast Sirens (AHAB) for WA state. Updated: 08/18/2025 Operational status updated real-time during Tsunami Watches / Warnings only. This data compiled by the Washington Military Department. The All Hazards Alert Broadcasting System (AHAB) data points supply visual depiction of where the siren locations are along the Washington State Coast and some inland waterways. If an actual tsunami event occurs the sirens supply not only audible but visual warnings of the impending danger via a wailing audio sound and an intense blue light for the hearing impaired, which can also cut through fog and is visible from a long distance. The sirens further supply a 4500-watt public address system to relay verbal information to the local populations or play digitally pre-recorded messages. The siren design enables a 360-degree coverage. Has the capability to make test and actual evacuation announcements in English and Spanish (These are pre-recorded on each siren's installed micro SD card.) Using pre-programmed phrases and words, messages can be created at any control point for such things as ‘Shelter in Place', and Hazardous Material Notification. Siren positional data is derived from the satellite transponder attached to each siren which derives its location from current GPS satellites deployed by the United States. Attribute Description RTU - Siren reference number Address - Nearest address of where the siren is located Name - Name of the siren LocationReference - Description of where the siren is located in relation to address City - City where the siren is location County - County where siren is located Elevation - Elevation in feet AMSL of the siren location Latitude - Latitude of siren location Longitude - Longitude of siren locationArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/a2671685cc604fbda84f6cf17f630ff3_0engState of Washington Geospatial Open Data PortalPublicAll Hazards Alert Broadcast (AHAB) view [Washington (State)]Web servicesWashington (State)Last Modified: 2025-12-04