- $
-
maintenance check indicator
- -
-
light intensity
- +
-
heavy intensity
- /
-
indicator that visual range data follows; separator between temperature and dew point data.
- ACC
-
altocumulus castellanus
- ACFT MSHP
-
aircraft mishap
- ACSL
-
altocumulus standing lenticular cloud
- ALP
-
airport location point
- AO1
-
automated station without precipitation discriminator
- AO2
-
automated station with precipitation discriminator
- APRNT
-
apparent
- APRX
-
approximately
- ATCT
-
airport traffic control tower
- AUTO
-
automated report
- B
-
began
- BC
-
patches
- BKN
-
broken
- BL
-
blowing
- BR
-
mist
- C
-
center (with reference to runway designation)
- CA
-
cloud-air lightning
- CB
-
cumulonimbus cloud
- CBMAM
-
cumulonimbus mammatus cloud
- CC
-
cloud-cloud lightning
- CCSL
-
cirrocumulus standing lenticular cloud
- CG
-
cloud-ground lightning
- CHI
-
cloud-height indicator
- CHINO
-
sky condition at secondary location not available
- CIG
-
ceiling
- CLR
-
clear
- CONS
-
continuous
- COR
-
correction to a previously disseminated report
- DOC
-
Department of Commerce
- DOD
-
Department of Defense
- DOT
-
Department of Transportation
- DR
-
low drifting
- DS
-
duststorm
- DSNT
-
distant
- DU
-
widespread dust
- DZ
-
drizzle
- E
-
east, ended
- FAA
-
Federal Aviation Administration
- FC
-
funnel cloud
- FEW
-
few clouds
- FG
-
fog
- FIBI
-
filed but impracticable to transmit
- FIRST
-
first observation after a break in coverage at manual station
- FROPA
-
frontal passage
- FRQ
-
frequent
- FT
-
feet
- FU
-
smoke
- FZ
-
freezing
- FZRANO
-
freezing rain sensor not available
- G
-
gust
- GR
-
hail
- GS
-
small hail and/or snow pellets
- HZ
-
haze
- IC
-
ice crystals, in-cloud lightning
- ICAO
-
International Civil Aviation Organization
- KT
-
knots
- L
-
left (with reference to runway designation)
- LAST
-
last observation before a break in coverage at a manual station
- LST
-
Local Standard Time
- LTG
-
lightning
- LWR
-
lower
- M
-
minus, less than
- METAR
-
aviation routine weather report
- MI
-
shallow
- MOV
-
moved/moving/movement
- MT
-
mountains
- N
-
north
- N/A
-
not applicable
- NCDC
-
National Climatic Data Center
- NE
-
northeast
- NOS
-
National Ocean Service
- NOSPECI
-
no SPECI reports are taken at the station
- NW
-
northwest
- NWS
-
National Weather Service
- OCNL
-
occasional
- OFCM
-
Office of the Federal Coordinator for Meteorology
- OVC
-
overcast
- OHD
-
overhead
- P
-
greater than
- PE
-
ice pellets
- PK WND
-
peak wind
- PNO
-
precipitation amount not available
- PO
-
dust/sand whirls (dust devils)
- PR
-
partial
- PRESFR
-
pressure falling rapidly
- PRESRR
-
pressure rising rapidly
- PWINO
-
precipitation identifier sensor not available
- PY
-
spray
- R
-
right (with reference to runway designation)
- RA
-
rain
- RVR
-
Runway Visual Range
- RVRNO
-
RVR system not available
- RWY
-
runway
- S
-
south
- SA
-
sand
- SCSL
-
stratocumulus standing lenticular cloud
- SCT
-
scattered
- SE
-
southeast
- SFC
-
surface
- SG
-
snow grains
- SH
-
shower(s)
- SKC
-
sky clear
- SLP
-
sea-level pressure
- SLPNO
-
sea-level pressure not available
- SM
-
statute miles
- SN
-
snow
- SNINCR
-
snow increasing rapidly
- SPECI
-
an unscheduled report taken when certain criteria have been met
- SQ
-
squalls
- SS
-
sandstorm
- SW
-
southwest
- TCU
-
towering cumulus
- TS
-
thunderstorm
- TSNO
-
thunderstorm information not available
- TWR
-
tower
- UP
-
unknown precipitation
- UTC
-
Coordinated Universal Time
- V
-
variable
- VA
-
volcanic ash
- VC
-
in the vicinity
- VIS
-
visibility
- VISNO
-
visibility at secondary location not available
- VRB
-
variable
- VV
-
vertical visibility
- W
-
west
- WG/SO
-
Working Group for Surface Observations
- WMO
-
World Meteorological Organization
- WND
-
wind
- WSHFT
-
wind shift
- Z
-
zulu, i.e., Coordinated Universal Time
