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.

Event codes:
Code Bulletin
BZW Blizzard warning
DSW Dust storm warning
FSW Flash freeze warning
HUA Hurricane watch
HUW2* Hurricane warning

High wind warning including…

Les suêtes wind warning
Wreckhouse 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
Required weekly and monthly tests
Code Bulletin
RMT1* Required monthly test
RWT Required weekly test
Event codes: for possible future implementation
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
Administrative bulletins
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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