afi met bulletins exchange (ambex) handbook - ICAO

AFI Regional SIGMET Guide Page 30/60
APPENDIX D: List of the Abbreviations and Code Words Used in SIGMET
ABV Above
AND* And
APRX Approximate or approximately
AT At (followed by time)
BLW Below
BY* By
CB Cumulonimbus
CENTRE* Centre (used to indicate tropical cyclone centre)
CLD Cloud
CNL Cancel or cancelled
CTA Control area
DS Dust storm
E East or eastern longitude
ERUPTION* Eruption (used to indicate volcanic eruption)
EMBD Embedded in layer (to indicate CB embedded in layer of other clouds)
FCST Forecast
FIR Flight information region
FL Flight level
FRQ Frequent
FZRA Freezing rain
GR Hail
HVY Heavy (used to indicate intensity of weather phenomena)
ICE Icing
INTSF Intensify or intensifying
ISOL Isolated
KM Kilometers
KMH Kilometers per hour
KT Knots
LINE* Line
MOV Move or moving or movement
MT Mountain
MTW Mountain waves
N North or northern latitude
NC No change
NE North-east
NM Nautical miles
NW North-west
OBS Observed
OBSC Obscured
OCNL Occasional
OF* Of … (place)
RA Rain
RDOACT Radioactive
S South or southern latitude
SE South-east
SEV Severe (used e.g. to qualify icing and turbulence reports)
Ninth Edition September 2007 Amend1/2010