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Notices to Airmen 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 Contraction Decode A BRG Bearing ABN Airport BYD Beyond ABV Above ACC Area Control Center (ARTCC) C ACCUM Accumulate CAAS Class A Airspace ACFT CAT Category ACR Air Carrier CBAS Class B Airspace ACT Active CBSA Class B Surface Area ADJ Adjacent CCAS Class C Airspace ADZD Advised CCLKWS Counterclockwise AFD Airport Facility Directory CCSA Class C Surface Area AGL Above ground level CD Clearance Delivery ALS Approach Light System CDAS Class D Airspace ALT CDSA Class D Surface Area ALTM Altimeter CEAS Class E Airspace ALTN Alternate CESA Class E Surface Area ALTNLY Alternately CFR Code of Federal Regulations ALSTG Altimeter Setting CGAS Class G Airspace AMDT Amendment CHG Change AMGR Airport Manager CIG Ceiling AMOS Automatic Meteorological Observing System CK Check AP Airport CL Centerline APCH Approach CLKWS Clockwise AP LGT Airport Lights CLR Clearance, clear(s), cleared to APP Approach control CLSD Closed ARFF Aircraft Rescue & Fire Fighting CMB Climb ARR Arrive, arrival CMSND Commissioned ASOS Automated Surface Observing System CNL Cancel ASPH Asphalt COM Communications ATC Air Traffic Control CONC Concrete ATCSCC Air Traffic Control System Command Center CPD Coupled ATIS Automatic Terminal Information Service CRS Course AUTH Authority CTC Contact AUTOB Automatic Weather Reporting System CTL Control AVBL Available AWOS Automatic Weather Observing/Reporting System D AWY Airway DALGT Daylight AZM Azimuth DCMSND Decommissioned DCT Direct B DEGS Degrees BA FAIR Braking action fair DEP Depart/Departure BA NIL Braking action nil DEPPROC Departure procedures BA POOR Braking action poor DH Decision Height BC Back Course DISABLD Disabled BCN Beacon DIST Distance BERM Snowbank(s) Containing Earth/Gravel DLA Delay or delayed BLW Below DLT Delete BND Bound DLY Daily

1 Contractions Notices to Airmen

Contraction Decode Contraction Decode DME Distance Measuring Equipment HR Hour DMSTN Demonstration DP Dew Point I DRFT Snowbank(s) Caused By Action IAF Initial approach fix DSPLCD Displaced IAP Instrument Approach Procedure INBD Inbound E ID Identification E East IDENT Identify/Identifier/Identification EB Eastbound IF Intermediate fix EFAS En Route Flight Advisory Service ILS Instrument Landing System ELEV Elevation IM Inner Marker ENG Engine IMC Instrument Meteorological Conditions ENRT En route IN Inch/Inches ENTR Entire INDEFLY Indefinitely EXC Except INFO Information INOP Inoperative F INSTR Instrument FAC Facility or facilities INT Intersection FAF Final Approach fix INTL International FAN MKR Fan Marker INTST Intensity FDC Flight Data Center IR Ice On Runway(s) FI/T Flight inspection temporary FI/P Flight inspection permanent K FM From KT Knots FREQ Frequency FNA Final approach L FPM Feet per minute L Left FREQ Frequency LAA Local Airport Advisory FRH Fly Runway Heading LAT FRI Friday LAWRS Limited Aviation Weather Reporting Station FRZN Frozen LB Pound/Pounds FSS Automated/Flight Service Station LC Local Control FT Foot, feet LOC Local/Locally/Location LCTD Located G LDA Localizer Type Directional Aid GC Ground Control LGT Light or lighting GCA Ground Control Approach LGTD Lighted GOVT Government LIRL Low Intensity Runway Lights GP Glide Path LLWAS Low Level Wind Shear Alert System GPS Global LM Compass Locator at ILS Middle Marker GRVL Gravel LDG Landing LLZ Localizer H LO Compass Locator at ILS Outer Marker HAA Height Above Airport LONG Longitude HAT Height Above Touchdown LRN Loran HDG Heading LSR Loose Snow on Runway(s) HEL Helicopter LT Left Turn HELI Heliport HIRL High Intensity Runway Lights M HIWAS Hazardous Inflight Weather Advisory Service MAG Magnetic HLDG Holding MAINT Maintain, maintenance HOL Holiday MALS Medium Intensity Approach Light System HP Holding Pattern

2 Notices to Airmen Contractions

Contraction Decode Contraction Decode Medium Intensity Approach Light System with P MALSF Sequenced Flashers PAEW Personnel and Equipment Working Medium Intensity Approach Light System with MALSR PAPI Precision Approach Path Indicator Runway Alignment Indicator Lights PAR Precision Approach MAPT Missed Approach Point PARL Parallel MCA Minimum Crossing Altitude PAT Pattern MDA Minimum Descent Altitude PAX Passenger MEA Minimum Enroute Altitude PCL Pilot Controlled Lighting MED Medium PERM Permanent/Permanently MIN Minute PJE Parachute jumping exercise MIRL Medium Intensity Runway Lights PLA Practice Low Approach MLS Microwave Landing System PLW Plow/Plowed MM Middle Marker PN Prior Notice Required MNM Minimum PPR Prior Permission Required MNT Monitor/Monitoring/Monitored PREV Previous MOC Minimum Obstruction Clearance PRN Psuedo random noise MON Monday PROC Procedure MRA Minimum reception altitude PROP Propeller MSA Minimum Safe Altitude/Minimum Sector Altitude PSR Packed Snow on Runway(s) MSAW Minimum Safe Altitude Warning PTCHY Patchy MSG Message PTN Procedure Turn MSL Mean Sea Level PVT Private MU MU meters MUD Mud R MUNI Municipal RAIL Runway Alignment Indicator Lights Remote Automatic Meteorological Observing RAMOS N System N North RCAG Remote Communication Air/Ground Facility NA Not Authorized RCL Runway Centerline NAV Navigation RCLL Runway Centerline Light System NB Northbound RCO Remote Communication Outlet NDB Nondirectional Beacon REC Receive/Receiver NE Northeast RELCTD Relocated NGT Night REIL Runway End Identifier Lights NM Nautical Mile(s) REP Report NMR Nautical Mile Radius RLLS Runway Lead'in Lights System NONSTD Nonstandard RMNDR Remainder NOPT No Procedure Turn Required RNAV Area Navigation NR Number RPLC Replace NTAP Notice To Airmen Publication RQRD Required NW Northwest RRL Runway Remaining Lights RSR En Route Surveillance Radar O RSVN Reservation OBSC Obscured RT Right Turn OBST Obstruction RTE Route OM Outer Marker RTR Remote /Receiver OPR Operate RTS Return to Service OPS Operation RUF Rough ORIG Original RVR Runway Visual Range OTS Out of Service RVRM Runway Visual Range Midpoint OVR Over RVRR Runway Visual Range Rollout RVRT Runway Visual Range Touchdown

3 Contractions Notices to Airmen

Contraction Decode Contraction Decode RWY Runway TIL Until S TKOF Takeoff S South TM Traffic Management SA Sand, sanded TMPA Traffic Management Program Alert SAT Saturday TRML Terminal SAWR Supplementary Aviation Weather Reporting Station TRNG Training SB Southbound TRSN Transition SDF Simplified Directional Facility TSNT Transient SE Southeast TUE Tuesday SFL Sequence Flashing Lights TWR Tower SID Standard Instrument Departure TWY Taxiway SIMUL Simultaneous SIR Packed or Compacted Snow and Ice on Runway(s) U SKED Scheduled UFN Until further notice SLR Slush on Runway(s) UNAVBL Unavailable SN Snow UNLGTD Unlighted SNBNK Snowbank(s) Caused by Plowing UNMKD Unmarked SNGL Single UNMNT Unmonitored SPD Speed UNREL Unreliable Simplified Short Approach Lighting System with UNUSBL Unusable SSALF Sequenced Flashers Simplified Short Approach Lighting System with V SSALR Runway Alignment Indicator Lights VASI Visual Approach Slope Indicator SSALS Simplified Short Approach Lighting System VDP Visual Descent Point SSR Secondary Surveillance Radar VGSI Visual Glide Slope Indicator STA Straight'in Approach VIA By Way Of STAR Standard Terminal Arrival VICE Instead/Versus SUN Sunday VIS Visibility SVC Service VMC Visual Meteorological Conditions SW Southwest VOL Volume SWEPT Swept or Broom/Broomed VOR VHF Omni'Directional Radio Range VORTAC VOR and TACAN (colocated) T W T Temperature W West TAA Terminal Arrival Area WB Westbound TACAN Tactical Air Navigational Aid WED Wednesday TAR Terminal area surveillance radar WEF With effect from or effective from TDZ Touchdown Zone WI Within TDZ LG Touchdown zone lights WIE With immediate effect or effective immediately TEMPO Temporary WKDAYS Monday through Friday TFC Traffic WKEND Saturday and Sunday TFR Temporary Flight Restriction WND Wind TGL Touch and Go Landings WPT Waypoint THN Thin WSR Wet Snow on Runway(s) THR Threshold WTR Water on Runway(s) THRU Through WX Weather THU Thursday

4 Notices to Airmen Contractions

WEATHER CONTRACTIONS

Contraction Decode Contraction Decode A BECMG Becoming (expected between 2 digit beginning A Absolute (temperature) hour and 2 digit ending hour) (TAF) A Alaskan Standard Time (time groups only) BFDK Before Dark A Arctic (air mass) BINOVC Breaks in Overcast A01 Automated Observation without Precipitation BKN Broken Discriminator (rain/snow) (METAR) BL Between Layers A02 Automated Observation with Precipitation BL Blowing (METAR) Discriminator (rain/snow) (METAR) BLD Build AAWF Auxiliary Aviation Weather Facility BLDUP Buildup AC Altocumulus BLKHLS Black Hills ACC Altocumulus Castellanus BLKT Blanket ACSL Standing Lenticular Altocumulus BLZD Blizzard ACYC Anticyclonic BMS Basic Meteorological Services ADRNDCK Adirondack BNDRY Boundary ADV Advise BOVC Base of Overcast ADVCTN Advection BR Mist (METAR) ADVY Advisory BRF Brief AFC Area Forecast Center BRKHIC Breaks in Higher Overcast AFDK After Dark BRKSHR Berkshire ALF Aloft BRM ALGHNY Allegheny BTWN Between ALQDS All Quadrants ALSEC All Sectors C ALTA Alberta C Central Standard Time (time groups only) ALUTN Aleutian C Continental (air mass) ALWF Actual Wind Factor CAN Canada AM Ante Meridiem CARIB Caribbean AMD Amended Forecast (TAF) CASCDS Cascades AMPLTD Amplitude CAVOK Cloud and Visibility OK (METAR) AMS Air Mass CAVU Clear or Scattered Clouds and Visibility Greater AMS American Meteorological Society Than Ten Miles ANLYS Analysis CAWS Common Aviation Weather Sub'system APLCN Appalachian CB Cumulonimbus AS Altostratus CBMAM Cumulonimbus Mamma ASOS Automated Surface Observing System CC Cirrocumulus ATLC Atlantic CCLKWS Counterclockwise AURBO Aurora Borealis CCSL Standing Lenticular Cirrocumulus AWP Aviation Weather Processors CDFNT Cold Front CFP Cold Front Passage B CHARC Characteristic B Beginning of Precipitation (time in minutes) CHSPK Chesapeake (weather reports only) CI Cirrus B Bering Standard Time (time groups only) CIG Ceiling BACLIN Baroclinic or Baroclinic Prognosis CLD Cloud BATROP Barotropic or Barotropic Prognosis CLR Clear at or below 12,000 feet (AWOS/ASOS BC Patches (METAR) report) (METAR) BC British Columbia CLRS Clear and Smooth BCFG Patchy Fog (METAR) CNCL Cancel BCH Beach CNDN Canadian BCKG Backing CNVTV Convective BDA Bermuda CONFDC Confidence

5 Contractions Notices to Airmen

Contraction Decode Contraction Decode CONTDVD Continental Divide EXTRM Extreme CONTRAILS Condensation Trails COR Correction to the observation (METAR) F CS Cirrostratus FA Area Forecast CST Coast FAH Fahrenheit CTGY Category FEW 1 or 2 octas (eighths) cloud coverage (METAR) CTSKLS Catskills FC Funnel Cloud (METAR) CU Cumulus +FC Tornado/ Water Spout (METAR) CUFRA Cumulus Fractus FG Fog (METAR) CYC Cyclonic FIBI Filed but Impractical to Transmit CYCLGN Cyclogenesis FILG Filling FINO Weather Report Will Not Be Filed for Transmission D FL Flash Advisory DABRK Daybreak FLDST Flood Stage DCAVU Clear or Scattered Clouds and Visibility Greater FLG Falling than Ten, Remainder of Report Missing (weather FLRY Flurry reports only) FLWIS Flood Warning Issued DKTS Dakotas FM From (4 digit beginning time in hours and minutes) DMSH Diminish (TAF) DNS Dense FNT Front DNSLP Downslope FNTGNS Frontogenesis DNSTRM Downstream FNTLYS Frontolysis DP Deep FORNN Forenoon DPNG Deepening FRMG Forming DPTH Depth FROPA Frontal Passage DR Low Drifting (METAR) FROSFC Frontal Surface DRFT Drift FRST Frost DS Dust Storm (METAR) FRWF Forecast Wind Factor DSIPT Dissipate FRZ Freeze DTLN International Dateline FRZLVL DTRT Deteriorate FRZN Frozen DU Widespread Dust (METAR) FT Terminal Forecast DVV Downward Vertical Velocity FU Smoke (METAR) DWNDFTS Downdrafts FULYR Smoke Layer Aloft DWPNT Dew Point FUOCTY Smoke Over City DZ Drizzle (METAR) FWC Fleet Weather Central FZ Supercooled/freezing (METAR) E

E Eastern Standard Time (time groups only) G E Ending of Precipitation (time in minutes) (weather G Gusts Reaching (knots) (weather reports only) reports only) GLFALSK Gulf of Alaska E Equatorial (air mass) GLFCAL Gulf of California E Estimated (weather reports only) GLFMEX Gulf of Mexico ELNGT Elongate GLFSTLAWR Gulf of St. Lawrence EMBDD Embedded GR Hail (METAR) EMSU Environment Meteorological Support Unit GRAD Gradient ENERN East'northeastern (weather reports only) GRBNKS Grand Banks ENEWD East'northeastward (weather reports only) GRDL Gradual EOF Expected Operations Forecast GRTLKS Great Lakes ESERN East'southeastern (weather reports only) GS Small Hail/Snow Pellets (METAR) ESEWD East'southeastward (weather reports only) GSTS Gusts EXTRAP Extrapolate GSTY Gusty H HCVIS High Clouds Visible

6 Notices to Airmen Contractions

Contraction Decode Contraction Decode HDFRZ Hard Freeze LOEAT Lowest Temperature Equaled for All Time HDSVLY Hudson Valley LOEFM Lowest Temperature Equaled for The Month HI Hi LOESE Lowest Temperature Equaled So Early HIEAT Highest Temperature Equaled for All Time LOESL Lowest Temperature Equaled So Late HIEFM Highest Temperature Equaled for The Month LOTMP Lowest Temperature HIESE Highest Temperature Equaled So Early LOXAT Lowest Temperature Exceeded for All Time HIESL Highest Temperature Equaled So Late LOXFM Lowest Temperature Exceeded for The Month HIFOR High Level Forecast LOXSE Lowest Temperature Exceeded So Early HITMP Highest Temperature LOXSL Lowest Temperature Exceeded So Late HIXAT Highest Temperature Exceeded for All Time LSR Loose Snow on Runway HIXFM Highest Temperature Exceeded for The Month LTGCC Lightning Cloud-to-Cloud HIXSE Highest Temperature Exceeded So Early LTGCCCG Lightning Cloud-to-Cloud, Cloud-to-Ground HIXSL Highest Temperature Exceeded So Late LTGCG Lightning Cloud-to-Ground HLSTO Hailstones LTGCW Lightning Cloud-to-Water HLTP Hilltop LTGIC Lightning in Clouds HLYR Haze Layer Aloft LTLCG Little Change HURCN Hurricane LTNG Lightning HUREP Hurricane Report LX Low Index HX High Index LYR Layer or Layered or Layers HZ Haze (METAR) M I M Maritime (air mass) IC Ice Crystals (METAR) M In temperature field means ”minus” or below zero ICG Icing (METAR) ICGIC Icing in Clouds M In RVR Field, indicates visibility less than lowest reportable sensor value (e.g. M0600FT) ICGICIP Icing in Clouds and Precipitation M Missing (weather reports only) ICGIP Icing in Precipitation M Mountain Standard Time (time groups only) IMDT Immediate MA Map Analysis INLD Inland MAN Manitoba INSTBY Instability MEGG Merging INTR Interior MEX Mexico INTRMTRGN Inter'Mountain Region MHKVLY Mohawk Valley INTS Intense MI Shallow (METAR) INTSFY Intensify MIDN Midnight INVRN Inversion MIFG Patches of Shallow Fog Not Deeper Than Two IOVC In Overcast Meters (METAR) IR Ice on Runway MLTLVL Melting Level MMO Main Meteorological Office J MNLD Mainland JTSTR MOGR Moderate or Greater MONTR Monitor K MOV Move K Cold (air mass) MRGL Marginal KFRST Killing Frost MRNG Morning

L MRTM Maritime MS Minus LABRDR Labrador MSTLY Mostly LCTMP Little Change in Temperature MSTR Moisture LDG Landing MTN Mountain LFT Lift MVFR Marginal VFR LGRNG Long Range MXD Mixed LIFR Low IFR (weather reports only) LK Lake

7 Contractions Notices to Airmen

Contraction Decode Contraction Decode N PDMT Predominate NB New Brunswick PDW Priority Delayed Weather NCWX No Change in Weather PL Ice Pellets (METAR) NELY Northeasterly (weather reports only) PEN Peninsula NERN Northeastern PGTSND Puget Sound NEW ENG New England PIBAL Pilot Observation NFLD Newfoundland PISE No Pilot Balloon Observation Due To Unfavorable NGT Night Sea Conditions NL No Layers PISO No Pilot Balloon Observation Due To Snow NMBR Number PIWI No Pilot Balloon Observation Due To High, or Gusty, Surface Wind NNERN North'northeastern (weather reports only) NNEWD North'northeastward (weather reports only) PLW Plow (snow) NNWRN North'northwestern (weather reports only) PNHDL Panhandle NNWWD Northwestward (weather reports only) PO Dust/Sand Whirls (METAR) NO Not available (e.g. SLPNO, RVRNO) PPINA Radar Weather Report Not Available (or omitted for a reason different than those otherwise stated) NORPI No Pilot Balloon Observation Will Be Filed Next Collection Unless Weather Changes Significantly PPINE Radar Weather Report No Echoes Observed NPRS Nonpersistent PPINO Radar Weather Report Equipment Inoperative Due To Breakdown NS Nimbostratus PPIOK Radar Weather Report Equipment Operation NS Nova Scotia Resumed NSCSWD No Small Craft or Storm Warning are Being PPIOM Radar Weather Report Equipment Inoperative Due Displayed To Maintenance NSW No Significant Weather (METAR) PR Partial (METAR) NVA Negative Vorticity Advection PRBLTY Probability NWLY Northwesterly (weather reports only) PRESFR Falling Rapidly NWRN Northwestern (weather reports only) PRESRR Pressure Rising Rapidly PRJMP Pressure Jump (weather reports only) O PROB40 Probability 40 percent (METAR) OBS Observation PROG Prognosis or Prognostic OBSC Obscure PRSNT Present OCFNT Occluded Front PS Plus OCLD Occlude PSG Passage OCLN Occlusion PSG Passing OFP Occluded Frontal Passage PTCHY Patchy OFSHR Offshore PTLY Partly OMTNS Over Mountains PVA Positive Vorticity Advection ONSHR On Shore PY Spray (METAR) ONT Ontario

ORGPHC Orographic Q OSV Ocean Station Vessel QSTNRY Quasi-stationary OTAS On Top and Smooth QUE Quebec OTLK Outlook OVC Overcast R R Runway (used in RVR measurement) P RA Rain (METAR) P Pacific Standard Time (time group only) RABA No RAWIN Obs., No Available P Polar (air mass) RABAL Balloon Wind Data P In RVR field, indicates visibility greater than RABAR Radiosonde Balloon Release highest reportable sensor value (e.g. P6000FT) RACO No RAWIN Obs., Communications Out P6SM Visibility greater than 6 statute miles (TAF only) RADAT Radiosonde Observation Data PAC Pacific RADNO Report Missing Account Radio Failure PBL Probable RAFI Radiosonde Observation Not Filed PCPN Precipitation RAFRZ Radiosonde Observation Freezing Levels PDMT Predominant RAHE No RAWIN Obs., No Gas Available

8 Notices to Airmen Contractions

Contraction Decode Contraction Decode RAICG Radiosonde Observation Icing at SLD Solid RAOB Radiosonde Observation SLP Sea Level pressure (e.g. 1013.2 reported as 132) RAREP Radar Weather Report SLR Slush on Runway RAVU Radiosonde Analysis and Verification Unit SLT Sleet RAWE No RAWIN obs., Unfavorable Weather SM Statute mile(s) RAWI No RAWIN Obs., High and Gusty SMK Smoke RAWIN Upper Winds Obs. (by radio methods) SMTH Smooth RCD Radar Cloud Detection Report SN Snow (METAR) RCDNA Radar Cloud Detection Report Not Available SNBNK Snowbank RCDNE Radar Cloud Detection Report No Echoes SNFLK Snowflake Observed SNOINCR Snow Depth Increase in Past Hour RCDNO Radar Cloud Detector Inoperative Due to SNW Snow Breakdown Until SNWFL Snowfall RCDOM Radar Cloud Detector Inoperative Due to SP Station Pressure Maintenance Until SPECI Special Report (METAR) RCKY Rockies (mountains) SPKL Sprinkle RDG Ridge SPLNS South Plains RDWND Radar Dome Wind SPRD Spread RESTR Restrict SQ Squall (METAR) RGD Ragged SQAL Squall RH Relative SQLN Squall Line RHINO Radar Echo Height Information Not Available SS Sandstorm (METAR) RHINO Radar Range Height Indicator Not Operating on Scan SSERN South-southeastern (weather reports only) RIOGD Rio Grande SSEWD South-southeastward (weather reports only) RMK Remark(s) SSWRN South-southwestern (weather reports only) RNFL Rainfall SSWWD South'southwestward (weather reports only) ROBEPS Radar Operating Below Prescribed Standard ST Stratus RPD Rapid STAGN Stagnation RSG Rising STFR Stratus Fractus RUF Rough STFRM Stratiform RY/RWY Runway STG Strong STM Storm S STNRY Stationary SA Sand (METAR) SWLG Swelling SASK Saskatchewan SWLY Southwesterly (weather reports only) SBSD Subside SWRN Southwestern (weather reports only) SC Stratocumulus SX Stability Index SCSL Standing Lenticular Stratocumulus SXN Section SCT Scattered SYNOP Synoptic SELS Severe Local Storms SYNS Synopsis SELY Southeasterly (weather reports only) T SERN Southeastern (weather reports only) SFERICS Atmospherics T Trace (weather reports only) SG Snow Grains (METAR) T Tropical (air mass) SGD Solar'Geophysical Data TCU Towering Cumulus SH Showers (METAR) TEMPO Temporary changes expected (between 2 digit beginning hour and 2 digit ending hour) (TAF) SHFT Shift (weather reports only) THD Thunderhead (non METAR) SHLW Shallow THDR Thunder (non METAR) SHRTLY Shortly THK Thick SHWR Shower THN Thin SIERNEV Sierra Nevada TKOF Takeoff SIR Snow and Ice on Runway TOP Cloud Top SKC Sky Clear (METAR) TOVC Top of Overcast

9 Contractions Notices to Airmen

Contraction Decode Contraction Decode TPG Topping VSBYIR Visibility Increasing Rapidly TRIB Tributary VV Vertical Visibility (Indefinite Ceiling) (METAR) TROF Trough TROP Tropopause W TRPCD Tropical Continental (air mass) W Warm (air mass) TRPCL Tropical WA AIRMET TRPLYR Trapping Layer WDC'1 World Data Centers in Western Europe TS Thunderstorm (METAR) WDC'2 World Data Centers Throughout Rest of World TSHWR Thundershower (non METAR) WDLY Widely TSQLS Thundersqualls (non METAR) WDSPRD Widespread TSTM Thunderstorm (non METAR) WEA Weather TURBC Turbulence WFP Warm Front Passage TURBT Turbulent WINT Winter TWRG Towering WND Wind WNWRN West'northwestern (weather reports only) U WNWWD West'northwestward (weather reports only) UAG Upper Atmosphere Geophysics WPLTO Western Plateau UDDF Up and Down Drafts WR Wet Runway UNSBL Unseasonable WRM Warm UNSTBL Unstable WRMFNT Warm Front UNSTDY Unsteady WRNG Warning UNSTL Unsettle WS Wind Shear (in TAFs, low level and not associated UP Unknown Precipitation (Automated Observations) with convective activity) UPDFTS Updrafts WS SIGMET UPR Upper WSHFT Wind Shift UPSLP Upslope WSOM Weather Service Operations Manual UPSTRM Upstream WSR Wet Snow on Runway UVV Upward Vertical Velocity WSWRN West'southwestern (weather reports only) UWNDS Upper Winds WSWWD West'southwestward (weather reports only) WTR Water V WTSPT Waterspout V Varies ( and RVR) WV Wave V Variable (weather reports only) WW Forecast VA Volcanic Ash (METAR) WXCON Flight VC Vicinity X VLCTY Velocity XCP Except VLNT Violent XPC Expect VLY Valley Y VR Veer VRB Variable wind direction when speed is less than or Y Yukon Standard Time (time groups only) equal to 6 knots YKN Yukon VRISL Vancouver Island, BC YLSTN Yellowstone VRT MOTN Vertical Motion VSBY Visibility Z VSBYDR Visibility Decreasing Rapidly ZI Zonal Index ZI Zone of Interior

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