Event codes for Specific Area Message Encoding
1*Note: Severe thunderstorm and Tornado warnings are also accompanied by a 1050 Hz warning tone to trigger basic tone alert receivers
2*Note: All overnight alerts (10:30 pm to 6 am, local time) will be delayed until 6 am. The exception are Severe thunderstorm, Tornado, Tropical storm, Hurricane, Tsunami warnings and Tsunami advisories.
| Code | Bulletin |
|---|---|
| BZW | Blizzard warning |
| DSW | Dust storm warning |
| FSW | Flash freeze warning |
| HUA | Hurricane watch |
| HUW2* | Hurricane warning |
| HWW | High wind warning including… Les suêtes wind warning |
| SMW | Special marine warning |
| SVA | Severe thunderstorm watch |
| SVR1*2* | Severe thunderstorm warning |
| SVS | Severe weather statement |
| TOA | Tornado watch |
| TOR1*2* | Tornado warning |
| TRA | Tropical storm watch |
| TRW2* | Tropical storm warning |
| TSA | Tsunami watch |
| TSW2* | Tsunami Advisory or Tsunami warning |
| WSA | Winter storm watch |
| WSW | Winter storm warning including... Blowing snow warning Freezing drizzle warning Freezing rain warning Snowfall warning Snow squall warning |
| ??A | Unrecognized watch |
| ??E | Unrecognized emergency |
| ??S | Unrecognized statement |
| ??W | Unrecognized warning |
| Code | Bulletin |
|---|---|
| RMT1* | Required monthly test |
| RWT | Required weekly test |
| Code | Bulletin |
|---|---|
| AVA | Avalanche watch |
| AVW | Avalanche warning |
| BHW | Biological hazard warning |
| BWW | Boil water warning |
| CAE | Child abduction emergency |
| CDW | Civil danger warning |
| CEM | Civil emergency |
| CFA | Coastal flood watch |
| CFW | Coastal flood warning |
| CHW | Chemical Hazard Warning |
| CWW | Contaminated water warning |
| DBA | Dam watch |
| DBW | Dam break warning |
| DEW | Contagious disease warning |
| EAN | Emergency action notification |
| EAT | Emergency action termination |
| EQW | Earthquake warning |
| EVA | Evacuation watch |
| EVI | Immediate evacuation |
| FCW | Food contamination warning |
| FFA | Flash flood watch |
| FFS | Flash Flood Statement |
| FFW | Flash flood warning |
| FLA | Flood watch |
| FLS | Flood statement |
| FLW | Flood warning |
| FRW | Fire warning |
| HLS | Hurricane statement |
| HMW | Hazardous materials warning |
| HWA | High wind watch |
| IBW | Iceberg warning |
| IFW | Industrial fire warning |
| LAE | Local area emergency |
| LEW | Law enforcement warning |
| LSW | Land slide warning |
| NUW | Nuclear power plant warning |
| POS | Power outage statement |
| RHW | Radiological hazard warning |
| SPS | Special weather statement |
| SPW | Shelter in-place Warning |
| TOE | 911 Telephone outage emergency |
| VOW | Volcano warning |
| WFA | Wild fire watch |
| WFW | Wild fire warning |
| Code | Bulletin |
|---|---|
| ADR | Administrative message |
| DMO | Practice/demo |
| NAT | National audible test |
| NIC | National Information Centre |
| NMN | Network notification essage |
| NPT | National periodic test |
| NST | National silent test |
| TXB | Transmitter backup on |
| TXF | Transmitter carrier off |
| TXO | Transmitter carrier on |
| TXP | Transmitter primary on |
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