MET forecast-contraction glossary
Contractions in Canadian aviation forecasts (TAF, GFA, SIGMET/AIRMET). Excludes METAR present-weather codes and TAF change-group syntax.
| Contraction | Plain language |
|---|---|
UPSLP |
upslope: wind climbing terrain |
DNSLP |
downslope: wind descending terrain |
FZRA |
freezing rain |
INSTBY |
instability |
ICEIC |
icing in cloud |
ICEIP |
icing in precipitation |
MTW |
mountain wave |
TURB |
turbulence |
EMBD |
embedded in a cloud layer |
LTNG |
lightning |
SQLN |
squall line |
TSGR |
thunderstorm(s) with hail |
OTLK |
outlook |
PROG |
prognosis / prognostic (a forecast chart) |
TROWAL |
trough of warm air aloft |
TS |
thunderstorm(s) |
TOP |
cloud top(s) |
- UPSLP vs DNSLP: opposites.
- ICEIC vs ICEIP: differ by location: cloud vs precipitation.
- Core set only; TC AIM MET Table 15.1: "not exhaustive".
References
- TC AIM MET Table 15.1 (Aviation Forecast Abbreviations, pp.179-182)