| Hazardous weather includes:
- thunderstorms
- tropical cyclones
- turbulence
- icing
- mountain wave
- duststorm
- sandstorm
- volcanic ash
- radioactive cloud
|
Some abbreviations used in SIGMET:
| Abbreviations |
Meaning |
| TS |
thunderstorm |
| TC |
tropical cyclone |
| VA |
volcanic ash |
| TURB |
turbulence |
| ICE |
icing |
| MTW |
mountain wave |
| GR |
hail |
| DS |
duststorm |
| SS |
sandstorm |
| CB |
cumulonimbus |
| OBSC |
obscured |
| EMBD |
embedded |
| FRQ |
frequent |
| SQL |
squally |
| HVY |
heavy |
| SEV |
severe |
| INTSF |
intensify |
| NC |
no change |
| WKN |
weaken |
| MOV |
move |
| RDOACT CLD |
radioactive cloud | |