Contractions
NOTAM contractions
This list contains most of the commonly used contractions currently in use in Notices to Airmen (NOTAMS) and the standard aviation weather products, such as METAR/TAF, area forecasts, SIGMETs, AIRMETs, etc.
Contraction | Decode |
ABN | Airport Beacon |
ABV | Above |
ACFT | Aircraft |
ACT | Active |
AD | Aerodrome |
ADJ | Adjacent |
AGL | Above Ground Level |
ALS | Approach Light System |
ALT | Altitude |
ALTN | Alternate |
AP | Airport |
APCH | Approach |
APP | Approach Control |
ARR | Arrive, Arrival |
ASPH | Asphalt |
ATC | Air Traffic Control |
ATIS | Automatic Terminal Information Service |
AUTH | Authority |
AVBL | Available |
AWY | Airway |
AZM | Azimuth |
BA GOOD | Braking action good |
BA GOOD TO MEDIUM | Braking action good to medium |
BA MEDIUM | Braking action medium |
BA MEDIUM TO POOR | Braking action medium to poor |
BC | Back Course |
BCN | Beacon |
BLW | Below |
CAT | Category |
CK | Check |
CL | Center line |
CLSD | Closed |
CMB | Climb |
COM | Communications |
CONC | Concrete |
CTC | Contact |
CTL | Control |
DCT | Direct |
DEG | Degrees |
DH | Decision Height |
DIST | Distance |
DLA | Delay or Delayed |
DLY | Daily |
DME | Distance Measuring Equipment |
DP | Dew Point Temperature |
E | East |
ELEV | Elevation |
ENG | Engine |
EXC | Except |
FAF | Final Approach fix |
FAN MKR | Fan Marker |
FDC | Flight Data Center |
FM | From |
FREQ | Frequency |
FNA | Final Approach |
FRI | Friday |
FSS | Automated/Flight Service Station |
FT | Foot, feet |
GCA | Ground Control Approach |
GP | Glide Path |
GPS | Global Positioning System |
GRVL | Gravel |
HDG | Heading |
HEL | Helicopter |
HELI | Heliport |
HIRL | High Intensity Runway Lights |
HIWAS | Hazardous Inflight Weather Advisory Service |
HLDG | Holding |
HR | Hour |
IAF | Initial approach fix |
IAP | Instrument Approach Procedure |
INBD | Inbound |
ID | Identification |
IDENT | Identify/Identifier/Identification |
IF | Intermediate approach fix |
ILS | Instrument Landing System |
IM | Inner Marker |
IN | Inch/Inches |
INFO | Information |
INOP | Inoperative |
INSTR | Instrument |
INT | Intersection |
INTL | International |
INTST | Intensity |
KT | Knots |
L | Left |
LAA | Local Airport Advisory |
LAT | Latitude |
LAWRS | Limited Aviation Weather Reporting Station |
LB | Pound/Pounds |
LC | Local Control |
LOC | Localizer |
LGT | Light or Lighting |
LGTD | Lighted |
LIRL | Low Intensity Runway Lights |
LM | Locator Middle |
LDG | Landing |
LO | Outer Locator |
LONG | Longitude |
MAINT | Maintain, maintenance |
MALS | Medium Intensity Approach Light System |
MALSF | Medium Intensity Approach Light System with Sequenced Flashers |
MALSR | Medium Intensity Approach Light System with Runway Alignment Indicator Lights |
MAPT | Missed Approach Point |
MCA | Minimum Crossing Altitude |
MDA | Minimum Descent Altitude |
MEA | Minimum En Route Altitude |
MIN | Minute |
MIRL | Medium Intensity Runway Lights |
MLS | Microwave Landing System |
MM | Middle Marker |
MNM | Minimum |
MNT | Monitor/Monitoring/Monitored |
MOC | Minimum Obstruction Clearance |
MON | Monday |
MSG | Message |
MSL | Mean Sea Level |
N | North |
NA | Not Authorized |
NAV | Navigation |
NB | Northbound |
NDB | Nondirectional Radio Beacon |
NE | North-east |
NGT | Night |
NM | Nautical Mile(s) |
NTAP | Notice To Airmen Publication |
NW | North-west |
OBSC | Obscured |
OBST | Obstacle |
OM | Outer Marker |
OPR | Operate |
OPS | Operation |
PAPI | Precision Approach Path Indicator |
PAR | Precision Approach Radar |
PARL | Parallel |
PAX | Passenger |
PCL | Pilot Controlled Lighting |
PERM | Permanent/Permanently |
PJE | Parachute Jumping Exercise |
PLA | Practice Low Approach |
PN | Prior Notice Required |
PPR | Prior Permission Required |
PRN | Psuedo random noise |
PROC | Procedure |
PTN | Procedure Turn |
RAIL | Runway Alignment Indicator Lights |
RCL | Runway Centerline |
RCLL | Runway Centerline Light System |
REC | Receive/Receiver |
REDL | Runway Edge Light |
REIL | Runway End Identifier Lights |
REP | Report |
RLLS | Runway Lead-in Lights System |
RNAV | Area Navigation |
RPLC | Replace |
RSR | En route Surveillance Radar |
RTS | Return to Service |
RVR | Runway Visual Range |
RWY | Runway |
S | South |
SAT | Saturday |
SB | Southbound |
SE | Southeast |
SID | Standard Instrument Departure |
SIMUL | Simultaneous |
SKED | Scheduled |
SSALF | Simplified Short Approach Lighting System with Sequenced Flashers |
SSALR | Simplified Short Approach Lighting System with Runway Alignment Indicator Lights |
SSALS | Simplified Short Approach Lighting System |
SSR | Secondary Surveillance Radar |
STA | Straight-in Approach |
STAR | Standard Terminal Arrival |
SUN | Sunday |
SW | Southwest |
T | Temperature |
TACAN | Tactical Air Navigational Aid |
TAR | Terminal Area Surveillance Radar |
TDZ | Touchdown Zone |
TEMPO | Temporary |
TFC | Traffic |
TFR | Temporary Flight Restriction |
TGL | Touch and Go Landings |
THR | Threshold |
THRU | Through |
THU | Thursday |
TKOF | Takeoff |
TUE | Tuesday |
TWR | Tower |
TWY | Taxiway |
U/S | Unserviceable |
UNREL | Unreliable |
VASI | Visual Approach Slope Indicator |
VIS | Visibility |
VOR | VHF Omni-Directional Radio Range |
VORTAC | VOR and TACAN (colocated) |
W | West |
WB | Westbound |
WED | Wednesday |
WI | Within |
WPT | Waypoint |
WX | Weather |
Weather Contractions
Contraction | Decode |
|---|---|
A | Absolute (Temperature) |
A | Alaskan Standard Time (Time Groups Only) |
A | Arctic (Air Mass) |
A01 | Automated Observation Without Precipitation Discriminator (Rain/Snow) (METAR) |
A02 | Automated Observation With Precipitation Discriminator (Rain/Snow) (METAR) |
AAWF | Auxiliary Aviation Weather Facility |
AC | Altocumulus |
ACC | Altocumulus Castellanus |
ACSL | Standing Lenticular Altocumulus |
ACYC | Anticyclonic |
ADRNDCK | Adirondack |
ADV | Advise |
ADVCTN | Advection |
ADVY | Advisory |
AFC | Area Forecast Center |
AFDK | After Dark |
ALF | Aloft |
ALGHNY | Allegheny |
ALQDS | All Quadrants |
ALSEC | All Sectors |
ALTA | Alberta |
ALUTN | Aleutian |
ALWF | Actual Wind Factor |
AM | Ante Meridiem |
AMD | Amended Forecast (TAF) |
AMPLTD | Amplitude |
AMS | Air Mass |
AMS | American Meteorological Society |
ANLYS | Analysis |
APLCN | Appalachian |
AS | Altostratus |
ASOS | Automated Surface Observing System |
ATLC | Atlantic |
AURBO | Aurora Borealis |
AWP | Aviation Weather Processors |
B | Beginning of Precipitation (Time in Minutes) (Weather Reports Only) |
B | Bering Standard Time (Time Groups Only) |
BACLIN | Baroclinic or Baroclinic Prognosis |
BATROP | Barotropic or Barotropic Prognosis |
BC | Patches (METAR) |
BC | British Columbia |
BCFG | Patchy Fog (METAR) |
BCH | Beach |
BCKG | Backing |
BDA | Bermuda |
BECMG | Becoming (Expected Between 2 Digit Beginning Hour and 2 Digit Ending Hour) (TAF) |
BFDK | Before Dark |
BINOVC | Breaks in Overcast |
BKN | Broken |
BL | Between Layers |
BL | Blowing (METAR) |
BLD | Build |
BLDUP | Buildup |
BLKHLS | Black Hills |
BLKT | Blanket |
BLZD | Blizzard |
BMS | Basic Meteorological Services |
BNDRY | Boundary |
BOVC | Base of Overcast |
BR | Mist (METAR) |
BRF | Brief |
BRKHIC | Breaks in Higher Overcast |
BRKSHR | Berkshire |
BRM | Barometer |
BTWN | Between |
C | Central Standard Time (Time Groups Only) |
C | Continental (Air Mass) |
CAN | Canada |
CARIB | Caribbean |
CASCDS | Cascades |
CAVOK | Cloud and Visibility OK (METAR) |
CAVU | Clear or Scattered Clouds and Visibility Greater Than Ten Miles |
CAWS | Common Aviation Weather Sub-system |
CB | Cumulonimbus |
CBMAM | Cumulonimbus Mamma |
CC | Cirrocumulus |
CCLKWS | Counterclockwise |
CCSL | Standing Lenticular Cirrocumulus |
CDFNT | Cold Front |
CFP | Cold Front Passage |
CHARC | Characteristic |
CHSPK | Chesapeake |
CI | Cirrus |
CIG | Ceiling |
CLD | Cloud |
CLR | Clear at or below 12,000 feet (AWOS/ASOS report) (METAR) |
CLRS | Clear and Smooth |
CNCL | Cancel |
CNDN | Canadian |
CNVTV | Convective |
CONFDC | Confidence |
CONTDVD | Continental Divide |
CONTRAILS | Condensation Trails |
COR | Correction to the Observation (METAR) |
CS | Cirrostratus |
CST | Coast |
CTGY | Category |
CTSKLS | Catskills |
CU | Cumulus |
CUFRA | Cumulus Fractus |
CYC | Cyclonic |
CYCLGN | Cyclogenesis |
DABRK | Daybreak |
DCAVU | Clear or Scattered Clouds and Visibility Greater than Ten, Remainder of Report Missing (Weather Reports Only) |
DKTS | Dakotas |
DMSH | Diminish |
DNS | Dense |
DNSLP | Downslope |
DNSTRM | Downstream |
DP | Deep |
DPNG | Deepening |
DPTH | Depth |
DR | Low Drifting (METAR) |
DRFT | Drift |
DS | Dust Storm (METAR) |
DSIPT | Dissipate |
DTLN | International Dateline |
DTRT | Deteriorate |
DU | Widespread Dust (METAR) |
DVV | Downward Vertical Velocity |
DWNDFTS | Downdrafts |
DWPNT | Dew Point |
DZ | Drizzle (METAR) |
E | Eastern Standard Time (Time Groups Only) |
E | Ending of Precipitation (Time in Minutes) (Weather Reports Only) |
E | Equatorial (Air Mass) |
E | Estimated (Weather Reports Only) |
ELNGT | Elongate |
EMBDD | Embedded |
EMSU | Environment Meteorological Support Unit |
ENERN | East-northeastern (weather reports only) |
ENEWD | East-northeastward (weather reports only) |
EOF | Expected Operations Forecast |
ESERN | East-southeastern (weather reports only) |
ESEWD | East-southeastward (weather reports only) |
EXTRAP | Extrapolate |
EXTRM | Extreme |
FA | Area Forecast |
FAH | Fahrenheit |
FEW | 1 or 2 Octas (eighths) Cloud Coverage (METAR) |
FC | Funnel Cloud (METAR) |
+FC | Tornado/ Water Spout (METAR) |
FG | Fog (METAR) |
FIBI | Filed but Impractical to Transmit |
FILG | Filling |
FINO | Weather Report Will Not Be Filed for Transmission |
FL | Flash Advisory |
FLDST | Flood Stage |
FLG | Falling |
FLRY | Flurry |
FLWIS | Flood Warning Issued |
FM | From (4 Digit Beginning Time in Hours and Minutes) (TAF) |
FNT | Front |
FNTGNS | Frontogenesis |
FNTLYS | Frontolysis |
FORNN | Forenoon |
FRMG | Forming |
FROPA | Frontal Passage |
FROSFC | Frontal Surface |
FRST | Frost |
FRWF | Forecast Wind Factor |
FRZ | Freeze |
FRZLVL | Freezing Level |
FRZN | Frozen |
FT | Terminal Forecast |
FU | Smoke (METAR) |
FULYR | Smoke Layer Aloft |
FUOCTY | Smoke Over City |
FWC | Fleet Weather Central |
FZ | Supercooled/Freezing (METAR) |
G | Gusts Reaching (Knots) (Weather Reports Only) |
GLFALSK | Gulf of Alaska |
GLFCAL | Gulf of California |
GLFMEX | Gulf of Mexico |
GLFSTLAWR | Gulf of St. Lawrence |
GR | Hail (METAR) |
GRAD | Gradient |
GRBNKS | Grand Banks |
GRDL | Gradual |
GRTLKS | Great Lakes |
GS | Small Hail/Snow Pellets (METAR) |
GSTS | Gusts |
GSTY | Gusty |
HCVIS | High Clouds Visible |
HDFRZ | Hard Freeze |
HDSVLY | Hudson Valley |
HI | Hi |
HIEAT | Highest Temperature Equaled for All Time |
HIEFM | Highest Temperature Equaled for The Month |
HIESE | Highest Temperature Equaled So Early |
HIESL | Highest Temperature Equaled So Late |
HIFOR | High Level Forecast |
HITMP | Highest Temperature |
HIXAT | Highest Temperature Exceeded for All Time |
HIXFM | Highest Temperature Exceeded for The Month |
HIXSE | Highest Temperature Exceeded So Early |
HIXSL | Highest Temperature Exceeded So Late |
HLSTO | Hailstones |
HLTP | Hilltop |
HLYR | Haze Layer Aloft |
HURCN | Hurricane |
HUREP | Hurricane Report |
HX | High Index |
HZ | Haze (METAR) |
IC | Ice Crystals (METAR) |
ICG | Icing |
ICGIC | Icing in Clouds |
ICGICIP | Icing in Clouds and Precipitation |
ICGIP | Icing in Precipitation |
IMDT | Immediate |
INLD | Inland |
INSTBY | Instability |
INTR | Interior |
INTRMTRGN | Inter-Mountain Region |
INTS | Intense |
INTSFY | Intensify |
INVRN | Inversion |
IOVC | In Overcast |
IR | Ice on Runway |
JTSTR | Jet Stream |
K | Cold (air mass) |
KFRST | Killing Frost |
LABRDR | Labrador |
LCTMP | Little Change in Temperature |
LDG | Landing |
LFT | Lift |
LGRNG | Long Range |
LIFR | Low IFR (Weather Reports Only) |
LK | Lake |
LOEAT | Lowest Temperature Equaled for All Time |
LOEFM | Lowest Temperature Equaled for The Month |
LOESE | Lowest Temperature Equaled So Early |
LOESL | Lowest Temperature Equaled So Late |
LOTMP | Lowest Temperature |
LOXAT | Lowest Temperature Exceeded for All Time |
LOXFM | Lowest Temperature Exceeded for The Month |
LOXSE | Lowest Temperature Exceeded So Early |
LOXSL | Lowest Temperature Exceeded So Late |
LSR | Loose Snow on Runway |
LTGCC | Lightning Cloud-to-Cloud |
LTGCCCG | Lightning Cloud-to-Cloud, Cloud-to-Ground |
LTGCG | Lightning Cloud-to-Ground |
LTGCW | Lightning Cloud-to-Water |
LTGIC | Lightning in Clouds |
LTLCG | Little Change |
LTNG | Lightning |
LX | Low Index |
LYR | Layer or Layered or Layers |
M | Maritime (Air Mass) |
M | In Temperature Field Means "Minus" or Below Zero (METAR) |
M | In RVR Field, Indicates Visibility Less than Lowest Reportable Sensor Value (e.g. M0600FT) |
M | Missing (Weather Reports Only) |
M | Mountain Standard Time (Time Groups Only) |
MA | Map Analysis |
MAN | Manitoba |
MEGG | Merging |
MEX | Mexico |
MHKVLY | Mohawk Valley |
MI | Shallow (METAR) |
MIDN | Midnight |
MIFG | Patches of Shallow Fog Not Deeper Than Two Meters (METAR) |
MLTLVL | Melting Level |
MMO | Main Meteorological Office |
MNLD | Mainland |
MOGR | Moderate or Greater |
MONTR | Monitor |
MOV | Move |
MRGL | Marginal |
MRNG | Morning |
MRTM | Maritime |
MS | Minus |
MSTLY | Mostly |
MSTR | Moisture |
MTN | Mountain |
MVFR | Marginal VFR |
MXD | Mixed |
NB | New Brunswick |
NCWX | No Change in Weather |
NELY | Northeasterly (weather reports only) |
NERN | Northeastern |
NEW ENG | New England |
NFLD | Newfoundland |
NGT | Night |
NL | No Layers |
NMBR | Number |
NNERN | North-northeastern (weather reports only) |
NNEWD | North-northeastward (weather reports only) |
NNWRN | North-northwestern (weather reports only) |
NNWWD | Northwestward (weather reports only) |
NO | Not available (e.g. SLPNO, RVRNO) |
NORPI | No Pilot Balloon Observation Will Be Filed Next Collection Unless Weather Changes Significantly |
NPRS | Nonpersistent |
NS | Nimbostratus |
NS | Nova Scotia |
NSCSWD | No Small Craft or Storm Warning Are Being Displayed |
NSW | No Significant Weather (METAR) |
NVA | Negative Vorticity Advection |
NWLY | Northwesterly (Weather Reports Only) |
NWRN | Northwestern (Weather Reports Only) |
OBS | Observation |
OBSC | Obscure |
OCFNT | Occluded Front |
OCLD | Occlude |
OCLN | Occlusion |
OFP | Occluded Frontal Passage |
OFSHR | Offshore |
OMTNS | Over Mountains |
ONSHR | On Shore |
ONT | Ontario |
ORGPHC | Orographic |
OSV | Ocean Station Vessel |
OTAS | On Top and Smooth |
OTLK | Outlook |
OVC | Overcast |
P | Pacific Standard Time (Time Group Only) |
P | Polar (Air Mass) |
P | In RVR Field, Indicates Visibility Greater Than Highest Reportable Sensor Value (e.g. P6000FT) |
P6SM | Visibility Greater Than 6 Statute Miles (TAF Only) |
PAC | Pacific |
PBL | Probable |
PCPN | Precipitation |
PDMT | Predominant |
PDMT | Predominate |
PDW | Priority Delayed Weather |
PL | Ice Pellets (METAR) |
PEN | Peninsula |
PGTSND | Puget Sound |
PIBAL | Pilot Balloon Observation |
PISE | No Pilot Balloon Observation Due To Unfavorable Sea Conditions |
PISO | No Pilot Balloon Observation Due To Snow |
PIWI | No Pilot Balloon Observation Due To High, or Gusty, Surface Wind |
PLW | Plow (snow) |
PNHDL | Panhandle |
PO | Dust/Sand Whirls (METAR) |
PPINA | Radar Weather Report Not Available (Or Omitted For A Reason Different Than Those Otherwise Stated) |
PPINE | Radar Weather Report No Echoes Observed |
PPINO | Radar Weather Report Equipment Inoperative Due To Breakdown |
PPIOK | Radar Weather Report Equipment Operation Resumed |
PPIOM | Radar Weather Report Equipment Inoperative Due To Maintenance |
PR | Partial (METAR) |
PRBLTY | Probability |
PRESFR | Pressure Falling Rapidly |
PRESRR | Pressure Rising Rapidly |
PRJMP | Pressure Jump (Weather Reports Only) |
PROB40 | Probability 40 Percent (METAR) |
PROG | Prognosis or Prognostic |
PRSNT | Present |
PS | Plus |
PSG | Passage |
PSG | Passing |
PTCHY | Patchy |
PTLY | Partly |
PVA | Positive Vorticity Advection |
PY | Spray (METAR) |
QSTNRY | Quasi-stationary |
QUE | Quebec |
R | Runway (Used in RVR Measurement) |
RA | Rain (METAR) |
RABA | No RAWIN Obs., No Balloons Available |
RABAL | Radiosonde Balloon Wind Data |
RABAR | Radiosonde Balloon Release |
RACO | No RAWIN Obs., Communications Out |
RADAT | Radiosonde Observation Data |
RADNO | Report Missing Account Radio Failure |
RAFI | Radiosonde Observation Not Filed |
RAFRZ | Radiosonde Observation Freezing Levels |
RAHE | No RAWIN Obs., No Gas Available |
RAICG | Radiosonde Observation Icing at |
RAOB | Radiosonde Observation |
RAREP | Radar Weather Report |
RAVU | Radiosonde Analysis and Verification Unit |
RAWE | No RAWIN obs., Unfavorable Weather |
RAWI | No RAWIN Obs., High and Gusty Winds |
RAWIN | Upper Winds Obs. (By Radio Methods) |
RCD | Radar Cloud Detection Report |
RCDNA | Radar Cloud Detection Report Not Available |
RCDNE | Radar Cloud Detection Report No Echoes Observed |
RCDNO | Radar Cloud Detector Inoperative Due to Breakdown Until |
RCDOM | Radar Cloud Detector Inoperative Due to Maintenance Until |
RCKY | Rockies (Mountains) |
RDG | Ridge |
RDWND | Radar Dome Wind |
RESTR | Restrict |
RGD | Ragged |
RH | Relative Humidity |
RHINO | Radar Echo Height Information Not Available |
RHINO | Radar Range Height Indicator Not Operating on Scan |
RIOGD | Rio Grande |
RMK | Remark(s) |
RNFL | Rainfall |
ROBEPS | Radar Operating Below Prescribed Standard |
RPD | Rapid |
RSG | Rising |
RUF | Rough |
RY/RWY | Runway |
SA | Sand (METAR) |
SASK | Saskatchewan |
SBSD | Subside |
SC | Stratocumulus |
SCSL | Standing Lenticular Stratocumulus |
SCT | Scattered |
SELS | Severe Local Storms |
SELY | Southeasterly (Weather Reports Only) |
SERN | Southeastern (Weather Reports Only) |
SFERICS | Atmospherics |
SG | Snow Grains (METAR) |
SGD | Solar-Geophysical Data |
SH | Showers (METAR) |
SHFT | Shift (Weather Reports Only) |
SHLW | Shallow |
SHRTLY | Shortly |
SHWR | Shower |
SIERNEV | Sierra Nevada |
SIR | Snow and Ice on Runway |
SKC | Sky Clear (METAR) |
SLD | Solid |
SLP | Sea Level Pressure (e.g. 1013.2 Reported as 132) |
SLR | Slush on Runway |
SLT | Sleet |
SM | Statute Mile(s) |
SMK | Smoke |
SMTH | Smooth |
SN | Snow (METAR) |
SNBNK | Snowbank |
SNFLK | Snowflake |
SNOINCR | Snow Depth Increase in Past Hour |
SNW | Snow |
SNWFL | Snowfall |
SP | Station Pressure |
SPECI | Special Report (METAR) |
SPKL | Sprinkle |
SPLNS | South Plains |
SPRD | Spread |
SQ | Squall (METAR) |
SQAL | Squall |
SQLN | Squall Line |
SS | Sandstorm (METAR) |
SSERN | South-southeastern (Weather Reports Only) |
SSEWD | South-southeastward (Weather Reports Only) |
SSWRN | South-southwestern (Weather Reports Only) |
SSWWD | South-southwestward (Weather Reports Only) |
ST | Stratus |
STAGN | Stagnation |
STFR | Stratus Fractus |
STFRM | Stratiform |
STG | Strong |
STM | Storm |
STNRY | Stationary |
SWLG | Swelling |
SWLY | Southwesterly (Weather Reports Only) |
SWRN | Southwestern (Weather Reports Only) |
SX | Stability Index |
SXN | Section |
SYNOP | Synoptic |
SYNS | Synopsis |
T | Trace (Weather Reports Only) |
T | Tropical (Air Mass) |
TCU | Towering Cumulus |
TEMPO | Temporary Changes Expected (Between 2 Digit Beginning Hour and 2 Digit Ending Hour) (TAF) |
THD | Thunderhead (non METAR) |
THDR | Thunder (non METAR) |
THK | Thick |
THN | Thin |
TKOF | Takeoff |
TOP | Cloud Top |
TOVC | Top of Overcast |
TPG | Topping |
TRIB | Tributary |
TROF | Trough |
TROP | Tropopause |
TRPCD | Tropical Continental (Air Mass) |
TRPCL | Tropical |
TRPLYR | Trapping Layer |
TS | Thunderstorm (METAR) |
TSHWR | Thundershower (non METAR) |
TSQLS | Thundersqualls (non METAR) |
TSTM | Thunderstorm (non METAR) |
TURBC | Turbulence |
TURBT | Turbulent |
TWRG | Towering |
UAG | Upper Atmosphere Geophysics |
UDDF | Up and Down Drafts |
UNSBL | Unseasonable |
UNSTBL | Unstable |
UNSTDY | Unsteady |
UNSTL | Unsettle |
UP | Unknown Precipitation (Automated Observations) |
UPDFTS | Updrafts |
UPR | Upper |
UPSLP | Upslope |
UPSTRM | Upstream |
UVV | Upward Vertical Velocity |
UWNDS | Upper Winds |
V | Varies (Wind Direction and RVR) |
V | Variable (Weather Reports Only) |
VA | Volcanic Ash (METAR) |
VC | Vicinity |
VLCTY | Velocity |
VLNT | Violent |
VLY | Valley |
VR | Veer |
VRB | Variable Wind Direction when Speed Is Less Than or Equal To 6 Knots |
VRISL | Vancouver Island, BC |
VRT MOTN | Vertical Motion |
VSBY | Visibility |
VSBYDR | Visibility Decreasing Rapidly |
VSBYIR | Visibility Increasing Rapidly |
VV | Vertical Visibility (Indefinite Ceiling) (METAR) |
W | Warm (Air Mass) |
WA | AIRMET |
WDC-1 | World Data Centers in Western Europe |
WDC-2 | World Data Centers Throughout Rest of World |
WDLY | Widely |
WDSPRD | Widespread |
WEA | Weather |
WFP | Warm Front Passage |
WINT | Winter |
WND | Wind |
WNWRN | West-northwestern (Weather Reports Only) |
WNWWD | West-northwestward (Weather Reports Only) |
WPLTO | Western Plateau |
WR | Wet Runway |
WRM | Warm |
WRMFNT | Warm Front |
WRNG | Warning |
WS | Wind Shear (in TAFs, Low Level and Not Associated with Convective Activity) |
WS | SIGMET |
WSHFT | Wind Shift |
WSOM | Weather Service Operations Manual |
WSR | Wet Snow on Runway |
WSWRN | West-southwestern (Weather Reports Only) |
WSWWD | West-southwestward (Weather Reports Only) |
WTR | Water |
WTSPT | Waterspout |
WV | Wave |
WW | Severe Weather Forecast |
WXCON | Weather Reconnaissance Flight Pilot Report |
XCP | Except |
XPC | Expect |
Y | Yukon Standard Time (Time Groups Only) |
YKN | Yukon |
YLSTN | Yellowstone |
ZI | Zonal Index |
ZI | Zone of Interior |
