Aeronautical Terms
14 CFR
Title 14 of the Code of Federal Regulations
3D
Three Dimensional
A
Arctic
AAG
Alaska Aviation Guidance
AAWU
Alaska Aviation Weather Unit
AC
Advisory Circular
ACARS
Aircraft Communications Addressing and Reporting System
ACFJ
Australia, Canada, France, and Japan
ACSL
Altocumulus Standing Lenticular
ADS-B
Automatic Dependent Surveillance-Broadcast
AFD
Aviation Forecast Discussion
AFIS
Automatic Flight Information Service
AGL
Above Ground Level
AIM
Aeronautical Information Manual
AIREP
Aircraft Report
AIRMET
Airmen’s Meteorological Information
ALP
Airport Location Point
AMDAR
Aircraft Meteorological Data Relay
AP
Anomalous Propagation
app
Application
ARTCC
Air Route Traffic Control Center
ASI-AD
Aviation Safety Inspector—Aircraft Dispatcher
ASOS
Automated Surface Observing System
ATC
Air Traffic Control
ATCSCC
Air Traffic Control Systems Command Center
ATCT
Air Traffic Control Tower
ATIS
Automatic Terminal Information Service
AWC
Aviation Weather Center
AWIPS
Advanced Weather Interactive Processing System
AWOS
Automated Weather Observing System
AWRP
Aviation Weather Research Program
AWW
Airport Weather Warning
c
Continental
C-MAN
Coastal-Marine Automated Network
cA
Continental Arctic
CAPE
Convective Available Potential Energy
CAT
Clear Air Turbulence
Cb
Cumulonimbus
CCSL
Cirrocumulus Standing Lenticular
CH
Certificate Holder
CIP
Current Icing Product
CIT
Convectively Induced Turbulence
cm
centimeter
CME
Coronal Mass Ejection
CMO
Certificate Management Office
CONUS
Contiguous United States
cP
Continental Polar
CPHC
Central Pacific Hurricane Center
CRC
China-Russian Federation Consortium
cT
Continental Tropical
CWA
Center Weather Advisory
CWSU
Center Weather Service Unit
dBZ
decibels of Z
DO
Director of Operations
DOC
Department of Commerce
DOD
Department of Defense
DOT
Department of Transportation
E
East
ECFP
Extended Convective Forecast Product
EDR
Eddy Dissipation Rate
EF
Enhanced Fujita
EFB
Electronic Flight Bag
ENE
East-Northeast
ESE
East-Southeast
ETA
Estimated Time of Arrival
EUV
Extreme Ultraviolet
EWINS
Enhanced Weather Information System
FAA
Federal Aviation Administration
FB
Wind and Temperature Aloft Forecast
FIP
Forecast Icing Product
FIR
Flight Information Region
FIS
Flight Information Service
FIS-B
Flight Information Service-Broadcast
FL
Flight Level
FOC
Flight Operations Center
fpm
feet per minute
FSS
Flight Service Station
ft
foot
g
gram
GA
General Aviation
GCR
Galactic Cosmic Rays
GFA
Graphical Forecasts for Aviation
GFS
Global Forecast System
GNSS
Global Navigation Satellite System
GOES
Geostationary Operational Environmental Satellite
GPS
Global Positioning System
GTG
Graphical Turbulence Guidance
HEMS
Helicopter Emergency Medical Services
HF
High Frequency
Hg
Mercury
HIWC
High Ice Water Content
hPa
hectopascal
hr
hour
HRRR
High Resolution Rapid Refresh
IAP
Instrument Approach Procedure
IATA
International Air Transport Association
ICAO
International Civil Aviation Organization
IFR
Instrument Flight Rules
IMC
Instrument Meteorological Conditions
in
inch
inHg
inches of mercury
IR
Infrared
ITCZ
Intertropical Convergence Zone
ITWS
Integrated Terminal Weather System
J
joule
J/g
joules per gram
J/kg
joules per kilogram
Jg1K1
joules per gram Kelvin
K
Kelvin
K-H
Kelvin-Helmholtz
kg
kilogram
kg/m
kilogram per meter
kg/m3
kilogram per cubic meter
km
kilometer
km/h
kilometers per hour
kt
knot
kW
kilowatt
LAA
Local Airport Advisory
LAMP
Localized Aviation MOS Program
lb
pound
LCL
Lifted Condensation Level
LFC
Level of Free Convection
LI
Lifted Index
LIFR
Low Instrument Flight Rules
LLWAS
Low-Level Wind Shear Alert System
LLWS
Low-Level Wind Shear
LRNS
Long-Range Navigation System
m
Maritime
m/s
meters per second
m3
cubic meter
mA
Maritime Arctic
mb
or mbar millibar
MCS
Mesoscale Convective System
MEL
Minimum Equipment List
METAR
Aviation Routine Weather Report
mg/m3
milligrams per cubic meter
MHz
megahertz
mi
mile
min
minute
MIS
Meteorological Impact Statement
MOS
Model Output Statistics
mP
Maritime Polar
mph
miles per hour
MSL
Mean Sea Level
mT
Maritime Tropical
MVFR
Marginal Visual Flight Rules
MWO
Meteorological Watch Office
MWT
Mountain Wave Turbulence
N
North
N/A
Not Applicable
NAM
North American Model
NAS
National Airspace System
NASA
National Aeronautics and Space Administration
NAVAID
Navigational Aid
NCEP
National Centers for Environmental Prediction
NCO
NCEP Central Operations
NCWF
National Convective Weather Forecast
NDFD
National Digital Forecast Database
NE
Northeast
NESDIS
National Environmental Satellite, Data, and Information Service
NEXRAD
Next Generation Weather Radar
NextGen
Next Generation Air Transportation System
NHC
National Hurricane Center
nm
nanometer
NNE
North-Northeast
NNW
North-Northwest
NOAA
National Oceanic and Atmospheric Administration
NOTAM
Notice to Air Missions
NW
Northwest
NWP
Numerical Weather Prediction
NWS
National Weather Service
OAT
Outside Air Temperature
ODP
Obstacle Departure Procedure
OMO
One-Minute Observation
OPC
Ocean Prediction Center
OPMET
Operational Meteorological
P
Polar
PECASUS
Pan-European Consortium for Aviation Space Weather User Services
PGF
Pressure Gradient Force
PIC
Pilot in Command
PIREP
Pilot Weather Report
POES
Polar Operational Environment Satellite
POI
Principal Operations Inspector
Prog
Prognostic
psi
pounds per square inch
QA
Quality Assurance
Radar
Radio Detection and Ranging
RCM
Radar Coded Message
RCO
Remote Communications Outlet
RH
Relative Humidity
ROFOR
Route Forecast
RTMA
Real-Time Mesoscale Analysis
RVR
Runway Visual Range
S
South
SAA
Special Activity Airspace
SAB
Satellite Analysis Branch
SAS
Safety Assurance System
SATCOM
Satellite Communications
SAW
Aviation Watch Notification Message
SE
Southeast
SFRA
Special Flight Rules Area
SI
International System of Units
SIC
Second in Command
SID
Standard Instrument Departure
SIGMET
Significant Meteorological Information
SIGWX
Significant Weather
SLD
Supercooled Large Drop
SLWC
Supercooled Liquid Water Content
sm
statute mile
SMS
Safety Management System
SO2
Sulfur Dioxide
SPC
Storm Prediction Center
SPECI
Aviation Selected Special Weather Report
SRM
Safety Risk Management
SSE
South-Southeast
SSW
South-Southwest
STOP
Special Terminal Operation Procedures
SUA
Special Use Airspace
SW
Southwest
SWPC
Space Weather Prediction Center
T
Tropical
TAF
Terminal Aerodrome Forecast
TCA
Tropical Cyclone Advisory
TCAC
Tropical Cyclone Advisory Center
TCF
TFM Convective Forecast
TCu
Towering Cumulus
TDWR
Terminal Doppler Weather Radar
TDZ
Touchdown Zone
TFM
Traffic Flow Management
TFR
Temporary Flight Restriction
TMS
Traffic Management System
TMU
Traffic Management Unit
TRACON
Terminal Radar Approach Control
TUTT
Tropical Upper Tropospheric Trough
UAT
Universal Access Transceiver
UCAR
University Corporation for Atmospheric Research
UTC
Coordinated Universal Time
VAA
Volcanic Ash Advisory
VAAC
Volcanic Ash Advisory Center
VAD
Velocity Azimuth Display
VAG
Graphical Version of the Volcanic Ash Advisory
VAR
Volcanic Activity Report
VCP
Volume Coverage Pattern
VEIA
Visibility Estimation through Image Analytics
VFR
Visual Flight Rules
VHF
Very High Frequency
VMC
Visual Meteorological Conditions
VNR
VFR Flight Not Recommended
VOR
Very High Frequency Omni-Directional Range Station
VR
Rotation Speed
W
watt
WADL
West African Disturbance Line
WAFC
World Area Forecast Center
WAFS
World Area Forecast System
WARP
Weather and Radar Processor
WFO
Weather Forecast Office
WIFS
WAFS Internet File Service
Wm1K1
watt per meter-Kelvin
WMO
World Meteorological Organization
WNW
West-Northwest
WPC
Weather Prediction Center
WSP
Weather Systems Processor
WSR-88D
Weather Surveillance Radar—1988 Doppler
WSW
West-Southwest
Wx
Weather
yd
yard
Zor z
Zulu
°C or C
degrees Celsius or Celsius
°F or F
degrees Fahrenheit or Fahrenheit
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